Broken LP-FEBIAD used to out gas.

Monday, July 13, 2020, 14:52: Roughing.

Monday, July 13, 2020, 15:29: Turbo pumps on. 

Monday, July 13, 2020, 15:34: Ion gauge on.

Tuesday, July 14, 2020, 06:44: Waterlines opened.

Tuesday, July 14, 2020, 06:47: Power / sources on.

Tuesday, July 14, 2020, 06:49: Auto-ramping TGHT to 580 A @ 2 A per min.

Tuesday, July 14, 2020, 14:15: Vacuum @ 2.59e-06T 

Friday, July 17, 2020, 10:54: Auto-cooling @ 1 A per min. 

Monday, July 20, 2020, 06:51: Power /  sources off.

Monday, July 20, 2020, 06:52: Ion gauge / Turbo pumps off.

Monday, July 20, 2020, 06:53: Re-attached N bottle / regulator for purging.

Monday, July 20, 2020, 06:57: Waterlines Purged. N bottle @ 1300 PSI.

 Monday, March 01, 2021, 12:57: Roughing

Monday, March 01, 2021, 13:30: Turbos on. Started a bit late as I was distracted. They were ready at around 13:26

Monday, March 01, 2021, 13:41: IG1 on. 

 Monday, March 01, 2021, 14:08: Pumping aborted. I will install the ExTorr RGA available

Monday, March 01, 2021, 13:00 ExTorr RGA installed (e-log 859)

Monday, March 01, 2021, 16:07:Roughing 

Monday, March 01, 2021, 16:37: Turbos on. 

Monday, March 01, 2021, 16:46: IG1 on. 

Monday, March 01, 2021, 17:25: RGA on, recording trendlines 

Monday, March 01, 2021, 17:43: IG1 @ 1.1e-5 Torr

Monday, March 01, 2021, 17:43:  Waterlines open. No response on RGA nor striptool.

Monday, March 01, 2021, 18:20: Power/Optics on.

Monday, March 01, 2021, 19:02: IG1 @ 5.2e-6

Monday, March 01, 2021, 19:20: RGA shows a clear response on the opening and closing of the gas lines.

Monday, March 01, 2021, 19:53: IG1 @ 3.76e-6 T

Monday, March 01, 2021, 19:53: Auto-ramp up TGHT/TBHT to 580/290 @ 2 A/min.

Monday, March 01, 2021, 19:57: BIAS/EZL/EE @ 30/13/1.5 kV, anode bias @ 150 V, coil current @ 0 A.

Tuesday, March 02, 2021, 07:43: IG1 @ 2.96e-6T. 

Tuesday, March 02, 2021, 11:03: System tripped 

Tuesday, March 02, 2021, 11:06: Vacuum started to increase when coil was set to 80 A.

Tuesday, March 02, 2021, 11:08: IG1 started to drop as soon as the system tripped, this indicates that this was not a vacuum incursion from the gas or water but rather something related to heat.  Maybe some copper from the coil melted.

AS  checked thing were OK (see elog 860)

Tuesday, March 02, 2021, 12:35: Auto-ramp up TGHT/TBHT to 580/290 @ 4 A/min.

Tuesday, March 02, 2021, 15:25: IG1 @ 1.66e-7 T.

Tuesday, March 02, 2021, 15:26: Increasing coil current, response in vacuum. RGA increases mass 44 ( CO2).

* The coil jacket is made of fiberglass, that Si with mass 28. Hence,  the CO/N2  signal will increase if the jacket starts sublimating.

**from the future SiO with a mass of 44 will show an increase in "CO2" signal

Tuesday, March 02, 2021, 15:34: Coil @ 30 A IG1 @ 2.15e-6 T.

max IG1 = 2.25e-6T

Will remain at this current until vacuum  starts decreasing.

 Tuesday, March 02, 2021, 15:50:  BIAS/EZL/EE @ 30/13/1.5 kV, anode bias @ 150 V

Tuesday, March 02, 2021, 17:23: IG1 @ 2.15e-6 T. 

Tuesday, March 02, 2021, 17:26: Coil @ 40 A. 

Tuesday, March 02, 2021, 17:33: Coil @ 45 A 

max IG1 = 3.3e-6 T.

Tuesday, March 02, 2021, 18:39: IG1 @ 2.68e-6 

Tuesday, March 02, 2021, 18:40: Coil to 55 A. 

max IG1 = 3.87e-6 T

Tuesday, March 02, 2021, 20:07: IG1 @ 2.6e-6 T.

 Tuesday, March 02, 2021, 20:07: Coil to 60 A.

max IG1 = 3.07e-6 T

Tuesday, March 02, 2021, 21:25: IG1 @ 2.59e-6T 

Tuesday, March 02, 2021, 21:25: Coil to 70 A. 

 max IG1 = 4.1e-6 T

Tuesday, March 02, 2021, 22:31: IG1 @2.76e-6 T.

 Tuesday, March 02, 2021, 22:32: Coil @ 80 A.

 max IG1 = 4.35e-6 T

Tuesday, March 02, 2021, 23:31: IG1 @ 2.68e-6

Tuesday, March 02, 2021, 23:32 Coil @ 90 A. 

  max IG1 = 4.26e-6 T

Wednesday, March 03, 2021, 00:33: IG1 @ 2.68e-6 T.

Wednesday, March 03, 2021, 00:33: Coil to 100 A.

Voltage limited. Increasing from 1 A to 1.1 A.

  max IG1 = 3.87e-6 T

Wednesday, March 03, 2021, 01:03: IG1 @ 3.23e-6 T.

Will let sit on here until it outgasses 

  max IG1 = 3.87e-6 T

Wednesday, March 03, 2021, 07:27 : IG11.59e-6 T.

Wednesday, March 03, 2021, 07:28: Coil @ 110 A.

Voltage limited. Increasing from 1.1 A to 1.2 A.

 Wednesday summary: tght remained at 400 A. Several tbht, anode, and coil scans. Went up to 345 on the TBHT, the current on the cathode was above 250 mA for a voltage of around 300 V. I stopped there as the large electron current could melt the grid.

Thursday, March 04, 2021, 08:43: Re taking some points from yesterday 

Took several mass scans and emittance scans

Friday, March 05, 2021,

Investigated beam composition at different temperatures, I couldn't find a peak that is affected by argon injection. species with m/1 above 50 u only appear with tght>580 and tbht>295. These values are a bit tricky to work on as the FEBIAD has melted before near these values.

I will continue mass scans, emittance, and efficiency measurements.  On the last day I will push towards higher temperatures.

Saturday, March 06, 2021,

Investigating beam composition. Mass scans and the parameter sweep on the dominant peaks both with and without gases.  THBT is at 315 A.

Sunday, March 07, 2021:

Investigating  Ar++ both with and without gas.

Investigating  Ta++

Sunday, March 07, 2021, 11:15: TBHT to 320 A @ 2A/min 

Sunday, March 07, 2021, 11:45: During a parameter scan, epics cut communication with my notebook. It seems like the HLA server might be down :/ 

Sunday, March 07, 2021, 12:32: Discussed with  Spencer, he was upgrading jaya. Now things are up and running gain. 

Sunday, March 07, 2021, 13:36:  Ar+++ observed now at mass ~13.33 u, with a current of 3e-10A.

Sunday, March 07, 2021, 16:32: TBHT to 325 A @ 1A/min  

Sunday, March 07, 2021, 20:06: Emittance measurements for same efficiency parameters of anode, coil. The tail of the emittance gets larger on some combinations. 

Sunday, March 07, 2021, 20:07: TBHT to 330 A @ 1A/min  

Sunday, March 07, 2021, 20:22: After increasing the TBHT to 330 A, the anode leakage current started to drop, this hasn't happened before. The TBHT  voltage look stable so I don't think the cathode is failing ...yet 

systematic measurement of emittance: fixed anode sweeping coild, and also fixed coil sweeping anode

Monday, March 08, 2021, 01:55: Investigating 39K at very low voltages. Taking emittance measurements and RPMs. 

Monday, March 08, 2021, 02:25: Anode@ 0V Coil @ 50A. FC0 in 

Monday, March 08, 2021, 07:22:  TBHT to 335 A @ 1A/min  

Monday, March 08, 2021, 09:48: Water cooling values. The temperature on the HS are likely higher because of the high temperature we are running the ion source. The flow on TBHT seems lower compared to what was registered on elog 856

Monday, March 08, 2021, 10:44: At anode voltgae aroun 400 the system got unstable in high voltage, likely due to almost 600 mA being sink on the anode PS.

Monday, March 08, 2021, 10:45 : TBHT to 331 A @ -1A/min 

Monday, March 08, 2021, 13:38:

 08-Mar-21 16:47:54    32.463    3.517    21.183    2.701    22.075    1.61    23.494    4.918    

Tuesday, March 09, 2021: 

Investigating doubly charged species, increase tbht in steps of 1A. Anode voltage gets limited at around 300 V due to the high electron current

Tuesday, March 09, 2021, 08:30: TBHT to 340 A. 

Tuesday, March 09, 2021, 10:27: TBHT to 341 A. 

Tuesday, March 09, 2021, 11:26:  TBHT to 345 @ 1A/min 

Tuesday, March 09, 2021, 15:50:  TBHT to 350 @ 1A/min. I think above this value there will be an anode-cathode short, or the transfer line will melt.

 Tuesday, March 09, 2021, 17:1: TBHT to 360 @ 1A/min.

Tuesday, March 09, 2021, 19:26: TBHT to 370 @ 1A/min.

Tuesday, March 09, 2021, 19:32: TBHT voltage increasing but not the current. Increasing the TBHT voltage from 3.5 to 4 V. 

Tuesday, March 09, 2021, 20:17:  358 A is stable, 359 A is a bit jumpy, but 360 A is quite jumpy.

Tuesday, March 09, 2021, 20:29: CG1A reached 1 T, tapping down from 363 to 361. 

Wednesday, March 10, 2021, 00:20: It has been quite challenging to reach 370 A on the TBHT, the highest current reached is 368 A. At this current, it seems that an efficiency flattening has definitely started.

Wednesday, March 10, 2021, 00:21: Bringing TBHT to 325 A @ 2A/min

After a spark and during the last bit of the scan, it seems the anode shorted. The source is dead :/

 Wednesday, March 10, 2021, 02:43: Auto-cooling TGHT/TBHT to 0 A  @ 2A/min

Wednesday, March 10, 2021, 02:49: IV4 closed 

Wednesday, March 10, 2021, 02:49: IV4 timed out. 

Wednesday, March 10, 2021, 02:51: Cooling aborted.

 Wednesday, March 10, 2021, 02:51:  Auto-cooling TGHT/TBHT to 0 A  @ 4A/min

Wednesday, March 10, 2021, 02:55: Biases to 0 kV. 

Wednesday, March 10, 2021, 03:1:  Cooling aborted.

Wednesday, March 10, 2021, 03:11   Auto-cooling TGHT/TBHT to 0 A  @ 10A/min

Wednesday, March 10, 2021, 03:20: Short is not present anymore. Anode can hold voltage. 

Wednesday, June 30, 2021, 19:08: Roughing

Thursday, July 01, 2021, 08:57: Turbos on 

Thursday, July 01, 2021, 09:11: TP1A timed out. Reset it. Waiting for CG1A to drop a bit more. 

Thursday, July 01, 2021, 09:19: TSG:BV1A interlock bypassed so that can be opened. TSGTP1A open

TP1A at speed

Thursday, July 01, 2021, 09:20: Interlock bypassed was removed.

Thursday, July 01, 2021, 09:20: IG1 on. 

Wednesday, July 07, 2021, 08:52 : IgG1 @ 4.64e-7 T.

Wednesday, July 07, 2021, 08:53: Waterlines open. No vacuum response. RGA does not respond, probably the filament burnt out.

Wednesday, July 07, 2021: Gas system has a tiny leak, probably from my initial checks about two weeks ago

Wednesday, July 07, 2021: During adjustments on the gas system the copper pipe yielded a bit and the leak clearly increases. I asked Maico to prepare new VCR connection for replacement (thanks!)

Thursday, July 08, 2021: The gas system inside the Faraday cage is not leaking anymore. However, the gauge inside the service cap does not respond to any pressure changes. It needs replacement.

Friday, July 09, 2021: Gas system troubleshooted with a small nitrogen bottle. Problem was on the two-stage regulator. Tighter connection fixed it.

Power supplies respond normal

Friday, July 09, 2021, 15:19: IV4 open.

Emittance meter power supply on.

Friday, July 09, 2021, 15:22: IG1 @ 4.40e-7 T.

Friday, July 09, 2021, 15:22: Auto-ramping TGHT/TBHT to 300 A / 150A @ 2A/min

Friday, July 09, 2021, 16:06: Emittance meter was not workin. Mike Rowen rebooted the IOC and that fixed the issue.

 Sunday, July 11, 2021, 16:40: IG1 @ 5.13e-7 T.

Sunday, July 11, 2021, 16:42:  Auto-ramping TGHT/TBHT to 550A / 250A @ 2A/min

Sunday, July 11, 2021, 16:43. Anode @ 100 V and  500 mA current limit. 

Monday, July 12, 2021, 09:15: BIAS / EE / EZL @ 30 / -1.5 / 13 kV. - AS

FM

Monday, July 12, 2021, 09:41:  Auto-ramping TGHT/TBHT to 580A / 280A @ 2A/min

There seems to be an issue with the emittance meter. The scans seems to be successful but the plot is only noise.

Tuesday, July 13, 2021, 11:51: Telescope set on the magnet viewport: Grid is fine and I will check it continuosly.

The gauge inside the service cap is working now, as it actually never broke, a manual valve was still close inside the faraday cage.

I measured the voltage sent from the emittance PS, so the emittance meter receives voltage. I think the problem might be the faraday cup, either internally, or with the signal.

Tuesday, July 13, 2021, 15:54: Venting the beamline after the magnet to re-install the mass slit.

HV off

Tuesday, July 13, 2021, 16:19: TMS:BV6 open.

Tuesday, July 13, 2021, 16:21: TMS:BV2 open.

Tuesday, July 13, 2021, 16:27: TMSTP6 and TMSTP2 on.

Tuesday, July 13, 2021, 16:32: TMSIG6 On.

Tuesday, July 13, 2021, 16:40: HV on.

 Wednesday, July 14, 2021: Troubleshooting the emittance meter. I think I saw some indications of beam so it might be that I just need more intensity for a proper measurement.

Moving on, I tested the code as I want to implement a a couple of things: record a bidimensional anode current to make sure I capture any chance with the coil (if any), use temperature estimation from heating power as well.

When running a magnet-anode scan on sodium I triggered the high efficienct regime. This indicates that the cathode is either hotter or closer. With 280 A I am inclined on the latter.

The regime is unstable as the voltage fluctates as well as the ion current. Over a period of two hours

Friday, July 16, 2021, 12:08: Hv off to increase upstream pressure from |200| to |240| kPa, which is the maximum I can achieve with my two-stage regulator.

Friday, July 16, 2021, 12:15: Mass scan.

Friday, July 16, 2021, 13:54: TBHT to 260 @ -2A/min.

 Friday, July 16, 2021, 14:09: HV off.

Friday, July 16, 2021, 14:17: BIAS / EE / EZL @ 30 / -1.5 / 12.5 kV.

Friday, July 16, 2021, 14:17: Mass scan ongoing. Done for the day (on-site)

Saturday, July 17, 2021: Mass scans in both normal and anomalous regime.

Sunday, July 18, 2021, 07:42: Found TSG:CBC in a red state. Using the cfg button on the canbus utilities does not work. Likely the canbus card needs to be replaced.

Monday, July 19, 2021: AS fixed the CBC

Increased anode current limit to 600 mA. More ion current.

Anode voltage setpoint=500 A, anode voltage readback=250 V.

Moving the setpoint to 250 causes no effect. But when moving the setpoint to 245 V, the ion current, and the drain current decrease.

Putting together previous findings to discuss what to do next.

Grid still fine.

Tuesday, July 20, 2021, 17:22:   TBHT to 240 @ -2A/min.

Around 16:30 there was a slight target voltage drop. This coincided with the anode getting current limited (500mA) at 100V.

 Tuesday, July 20, 2021, 17:47:  IG1 reacts to the "sparks" observed on the anode leackage current.

Lowering the anode voltage to 0 V. I'll go on-site tomorrow to check the state of the grid and to check if there are visible sparks inside the chamber.

Wednesday, July 21, 2021, 12:40: entries from early today lost I'll try to summarize what has happened:

grid still fine

Manually sweeping the anode but no visual of any kind inside the vacuum. IG1 still reacts to sudden increase of leakage current but nothing observed inside the vacuum chamber.

 anode leakage current responds to decreasing the target heating current when lowering to 235A.

When going to 200 A, the anode leakage current drop to 0 mA when the cathode reached 211.

Now the cathode gets current limited as of 1 V.

grid still fine.

Wednesday, July 21, 2021, 12:44: TGHT/TBHT to 0 A @ -2A/min 

 Wednesday, July 21, 2021, 14:43: TBHT @ 0 A, TGHT @ 340 A. Setting the anode voltage to 500 V has a leakage current of 102.5 mA.

Wednesday, July 21, 2021, 22:19: IV4 closed

 Wednesday, July 21, 2021, 22:21:  BIAS / EE / EZL @ 0.000 kV.

Wednesday, July 21, 2021, 22:22:  IG1 off. Turbos off.

Thursday, July 22, 2021, 10:44: Venting:

 Thursday, July 22, 2021, 17:43: Roughing

New argon gas bottle installed.

Thursday, July 22, 2021, 18:16: Turbos on.

Thursday, July 22, 2021, 18:25: TP1A  timed out. TSG:CG1A is larger than TSG:CG1, that is the roughing lines are higher than the vacuum chamber. 

Thursday, July 22, 2021, 18:27: Bypassing TSG:BV1 to open it.

Thursday, July 22, 2021, 18:28: Turbo at speed.

Thursday, July 22, 2021, 18:28: Bypass removed.

Thursday, July 22, 2021, 18:28: IG1 on. 

Friday, July 23, 2021, 09:16: IG1 @ 1.69e-6 T.

Friday, July 23, 2021, 09:17: Waterlines open. No vacuum response

Friday, July 23, 2021, 10:09: While checking the gas connections I found out that inside the faraday cage there are a couple of connections missing:

Coil PS chasis ground disconnected

Resistor between  A and C (tbht pos and tght neg) disconnected.

Friday, July 23, 2021, 15:29: Gas system taken out to properly install a new "tee" union.

Friday, July 23, 2021, 15:29: IG1 @ 1.34e-6 T.

Friday, July 23, 2021, 15:52: Power/ sources on.

Friday, July 23, 2021, 15:54: Auto-ramping TGHT/TBHT to 580 A/ 280 A @ 2A/min

Friday, July 23, 2021, 15:58: IV4 open.

Saturday, July 24, 2021, 13:07: IG1 @ 1.25 e-6 T. 

Saturday, July 24, 2021, 18:34: BIAS / EE / EZL @ 30 / -1.5 / 13 kV. One spark when Bias reached 30 kV.

Saturday, July 24, 2021, 18:36: Two consecutive sparks. Lowering to bias  29.5  kV to let it conditioned there for at least 10 minutes.

Saturday, July 24, 2021, 18:46: Bias to 30 kV. No sparks. 

Saturday, July 24, 2021, 18:59. No sparks. IG1 @ 1.16e-6 

Saturday, July 24, 2021, 19:26: Anode gets current limited  as of 2 V. Maybe there is a short somewhere else either inside the vacuum box, or on the service cap. Will check tomorrow

Saturday, July 24, 2021, 19:30: BIAS / EE / EZL @ 0 kV.

Saturday, July 24, 2021, 19:30: Auto-cooling to 0 A @ -2A/min

Monday, July 26, 2021, 09:00: IG1 @ 4.58e-7 T.

Monday, July 26, 2021, 09:17: No visible sparks 

Monday, July 26, 2021, 09:22: Power sources off. 

Monday, July 26, 2021, 13:20: After some tests I can conclude a couple of things:

• Anode/Cathode voltage power supply works fine and draws the right current for a 100 kOhm resistor. 
• When all cables are disconnected from TBHT and TGHT F/Ts there is continuity between them and HV common.

Monday, July 26, 2021, 14:52: IV4 closed

Monday, July 26, 2021, 14:53: Turbos off.

Oops!, forgot to turned off IG1 but interlock did it for me :p

 Monday, July 26, 2021, 17:19: After opening the vaccum chamber I found the portion of the capillary that goes to the target was touching the heatshield. Confirmed continuity with a multimeter.

Manually move it away and no continuity confirmed with multimeter.

FTs A-D recconected.

Bypassing anode interlock to check there is no short. Confirmed.

Preparing to close and pump.

 Monday, July 26, 2021, 17:23: Roughing

Monday, July 26, 2021, 17:55: Turbos on.

Monday, July 26, 2021, 18:03 : TP1A timed out ...again

Monday, July 26, 2021, 18:03: Bypassing BV1A. TP1A reset and on. turbos at speed.

 Monday, July 26, 2021, 18:05: IG1 on.

Monday, July 26, 2021, 18:26: IG1 @ 1.97e-5 T. 

Monday, July 26, 2021, 22:33: IG1 @ 2.41e-6 T

Monday, July 26, 2021, 22:33: IV4 open. 

Monday, July 26, 2021, 22:55: BIAS/EZL/EE to 10/6/1 kV. No problem. All set to 0.000 kV again 

Monday, July 26, 2021, 22:57: Coil to 10 A. Anode to 100 V.. No problem. All set to 0 again.

 Monday, July 26, 2021, 22:59: Auto-ramping TGHT/TBHT to 580/280 A @ 2A/min.

Tuesday, July 27, 2021, 06:32: IG1 @ 1.52e-6 T.

At 01:30, approximately 10 minutes after TBHT heater reached the desired current, the anode went from 0 to 1.5 V.

Tried to put anode voltage to 100 V but it got current limited as of 2 V.

Given that before heating the anode voltage was fine, I think the gas tube move again and made contact with the heatshield.

I will need to open this again :(

 Tuesday, July 27, 2021, 06:41: Auto-cooling TGHT/TBHT to 0 A @ -4A/min

Tuesday, July 27, 2021, 09:08: Heaters @ 0 A. Anode still gets current limited.

Tuesday, July 27, 2021, 09:09: IV4 close. Timed out. 

 Tuesday, July 27, 2021, 09:09: IG1 off.

Tuesday, July 27, 2021, 09:09: Turbos off. 

Tuesday, July 27, 2021, 11:13: Venting.

Tuesday, July 27, 2021, 11:58: Gas tube move and end up touching the  heatshield again. When try to adjust it to add an insulator as an spacer, the gas line de-coupled from the target.

removing the target for re-installation and clearance addition.

 Replace Ta capillary going into the target with the one from previous febiad as it felt sturdy and had better shape for clearance with the HS.

Assembly has new gas tube to the target for better fit and clearance to the HS.

Electric checks before closing shows no short between TIS and HS.

Tuesday, July 27, 2021, 12:57: Venting

Tuesday, July 27, 2021, 13:28: Turbos on. 

TP1A timed out again! Bypassing BV1A to open it, then reset TP1A and turn  it on.  Turbo show that is at speed right away.

Tuesday, July 27, 2021, 13:38: IG1 on

Tuesday, July 27, 2021, 15:24: IG1 @ 7.07e-6.

Tuesday, July 27, 2021, 15:28: Waterlines open. No vacuum response.

Tuesday, July 27, 2021, 15:33. IV4. Timed out a couple of times.

Tuesday, July 27, 2021, 15:37: Power/Sources on.

 Tuesday, July 27, 2021, 17:57: IG1 @ 2.76e-6 T.

Tuesday, July 27, 2021, 18:04: Auto-ramping TGHT/TBHT to 560/280 A. @ 2A/min. 

Wednesday, July 28, 2021, 00:46: Found out that anode got current limited around 9 pm. I wonder if the tube got moved again

Wednesday, July 28, 2021, 00:48: Auto-cooling to 0 A to investigate. 

 Wednesday, July 28, 2021, 06:44: IV4 closed

Wednesday, July 28, 2021, 06:44: IG1 off. Turbos off. 

Wednesday, July 28, 2021, 08:01: Venting.

 Once more, the tube was touching the heatshield in the same way as before.

• The cause is likely the spiral line coming from the VCR as in "rest" state in pointing towards the grip handles.
• I was trying to put an insulator piece and I noticed (and recall) how much force I had to put in order to accommodate the spiral  line in order to align it with the target capillary.
• This lead me to think that when the targets gets hot and the capillary deforms, this will be pushed towards the HS.
• To fixed it, I modified the spiral to have less torque or at least make it push to the other side (touching the tbht is no problem).

Closing everything and pumping down.

Modified spiral tube from VCR to counteract torque towards the HS. Now points towards TBHT.

Electric checks before closing shows no short between TIS and HS.

Wednesday, July 28, 2021, 08:48: Venting

Wednesday, July 28, 2021, 09:18 Turbos on. 

Wednesday, July 28, 2021, 09:26: IG1 on. TP1 didn't timed out.

Wednesday, July 28, 2021, 10:24: IG1 @ 4.13e-6 T. All voltages can be set with no problem.

Wednesday, July 28, 2021, 11:48: IG1 @ 1.98e-6 T. Anode @ 10 V.

Wednesday, July 28, 2021, 11:49: Auto-ramping TGHT/TBHT to 560/280 A @ 4A/min. 

Wednesday, July 28, 2021, 14:10: Heaters reached setpoints. No shorts!

Wednesday, July 28, 2021, 14:14: IG1 @  1.71e-6 T.

Wednesday, July 28, 2021, 14:30: Spark when ramping voltage @ 20 kV.

Wednesday, July 28, 2021, 14:30: IV4 open. 

Wednesday, July 28, 2021, 14:32: Bias/ EZL/EE @ 30/13/1.5 kV. Anode @ 0 V.

Wednesday, July 28, 2021, 14:33: FC0 = 1.09e-10 A 

 Wednesday, July 28, 2021, 14:34: IG1 @ 1.62e-6 T.

Wednesday, July 28, 2021, 14:35:  Auto-ramping TGHT to 580 A @ 4A/min. 

Wednesday, July 28, 2021, 14:48: IG1 @1 .60e-6 T 

Wednesday, July 28, 2021, 14:48: FC0 = 2.35e-10 

Ready to start systematic measurements.

 Wednesday, July 28, 2021, 15:00: Mass scan with anode = 0 V started.

Couple more mass scans, and parameter scans with a python notebook.

Wednesday, July 28, 2021, 20:37:   Auto-ramping TBHT to 285 A @ 2A/min. 

Thursday, July 29, 2021, 11:46: Manually tapping to 279 A as this provides a similar power to an older measurement. Even though the anode-cathode gap distance might be different, this is a preliminary measurement to make sure things look relatively similar. 

 Thursday, July 29, 2021, 21:38: Most of the day I was running parameter scans with similar parameter to an older measurement.

For this I varied TBHT and TGHT and some look closer than other, which indicates how much the sources varies from each other.

I tried running an emittance measurement but it seems the voltage is not been swept. I need to check if the power supply is working.

 Thursday, July 29, 2021, 21:38: TBHT to 270 A  @ -2A/min. TGHT @ 580 A

Friday, July 30, 2021, 09:57: Things stay fine overnight and only TPS:CBC was found off . The plan for today is the following:

• Check grid integrity
• Flush and refill gas line
• Start systematic measurements at low temperature.
  • Mass scan nominal values of coil and anode
  • Anode-coil scans
  • Mass scan interesting points
  • Emittance scan interesting points

 Friday, July 30, 2021, 11:43: Grid is fine. Voltages to 0 to  open cage.

Friday, July 30, 2021, 11:44:  Gas lines flushed and refilled with a pressure of |200| kPa. Similar to older measurements. It seems that yesterday measurements were with |240| kPa.

Friday, July 30, 2021, 11:51: Noticed that TP6 was red. Likely a consequence of a spark. Not sure since when. The vacuum seem ok before. 

Friday, July 30, 2021, 11:55: TP1A interlock due to vacuum on CG1A. When opening it the system pressure peak and trip the heaters :/. Waiting for the backing lines to evacuate before heating again.

 Friday, July 30, 2021, 14:39: TSG:CG1A&B are not coming down. Bypassing TSG:BV1A increase the pressure reading on IG1, indicating that the signal is real. The question is why there is such buildup in the backing lines.

Digging the archive this seems common but only after march 2021, the pressure does not decrease as good as before. This matches a big water leak. Maybe a new pump is needed as it was the case in August 2020.

Friday, July 30, 2021, 14:49: IG1 off. TP1B off. 

Friday, July 30, 2021, 16:05: Backing lines @ 0.025 T. An order of magnitude decrease after swapping RP1 (see elog 889).

Turbos on, IG1 On. Things look to be ok again. TP1A epics readback is 9.92 A at all times but controller reads 6 A upon start (normal) and at full speed reads 0.7 A (normal). To check with control group.

Friday, July 30, 2021, 16:14: IG1 @ 7.02e-7 T.

Restarting everything after swapping RP1 (see elog 889).

Friday, July 30, 2021, 16:14: IG1 @ 7.02e-7 T.

Friday, July 30, 2021, 16:26: IV4 open. IG1 @ 6.3e-7 T.

Friday, July 30, 2021, 16:27: Auto-ramping TGHT/TBHT to 540/270 A @ 4A/min.

Friday, July 30, 2021, 16:32: Emittance meter power supply found at 500 V. Running a scan does not weep the voltage.

Cycling the PS and running a  scan. Now the voltage is swept.

Friday, July 30, 2021, 17:43: TBHT reached set current. TGHT @ 304 A and ramping up. IG1 @  6.36e-7 T. TIS glowing so I guess it didn't break from early trip.

Friday, July 30, 2021, 18:53: IG1 @ 7 e- 7 T.

Friday, July 30, 2021, 18:53 : Auto-ramping TGHT to 580A @ 4A/min.

Friday, July 30, 2021, 19:10. TGHT reached set current. IG1 @ 7.35e-7 T.

Friday, July 30, 2021, 19:22: BIAS/EZL/EE @ 30/13/1.5 kV. 

Friday, July 30, 2021, 19:25: IG1 @ 7.55e-7 T.

Friday, July 30, 2021, 19:26 :  Auto-ramping TBHT to 280A @ 4A/min.

 Friday, July 30, 2021, 19:29: TBHT reaches set current. IG1 @ 7.72e-7 T.

Friday, July 30, 2021, 21:24: Mass scans with gas on/off shows clear only contribution from gas line. 

Friday, July 30, 2021, 21:25: Anode=200C,Coil=30A. FC0=5.14e-9 A. FC6=9.35e-10 A for 40Ar+

Parameter scans performed on nominal heater current and also with heater at similar power to older measurements.

Leaving some devices that are typically at 0 V to something like 1 to 2 volts, to avoid the red 0 readback as a test.

Saturday, July 31, 2021, 08:13: System stable overnight. TMS:VCB5 was the only device found off.

Mass scans, anode-coil scans. gas line effects.

Sunday, August 01, 2021, 08:42: On-site: Grid is fine. Gas pressure stays at |200kPa| even after several line flushes. Continuing  remotely.

Several parameter scans all at 280A. All of the look remarkably similar, so reproducibility over two day is possible.  Mass scans at three different coil-anode combinations

Emittance scans still not possible @ 1.3e-9 A on FC6, when going to 290 A will try again.

Sunday, August 01, 2021, 22:52: IG1 @ 8.43e-7 T.

Sunday, August 01, 2021, 22:53:  Auto-ramping TBHT to 290A @ 4A/min.

Monday, August 02, 2021, 01:00: IG1 @ 860e-7T. FC1=1.59e-8.

Monday, August 02, 2021, 08:59: IG1 @ 7.44e-7 T.

Mass scans performed. Emittance scans are still not possible with FC6=2.2e-9 A. Parameter scans

 Monday, August 02, 2021, 09:02:  Auto-ramping TBHT to 300 A @ 4A/min.

Emittance scans are still not possible with FC6=3.1e-9 A

 Monday, August 02, 2021, 12:48: IG1 @ 7.6e-7 T.

Monday, August 02, 2021, 12:48:  Auto-ramping TBHT to 305 A @ 2A/min.

Monday, August 02, 2021, 16:40: IG1@ 8.01 e-7 T. 

 Parameter scans. Mass scans performed. Emittance scans are still not possible with FC6=6.21e-9 A. I think there is something wrong with the parameters or with the hardware. To check with Carla on Tuesday.

 I will take one more measurement at higher current and go tomorrow to check the emittance scan status.

Monday, August 02, 2021, 20:46:  Auto-ramping TBHT to 310 A @ 1A/min. IG1 @ 8.16e-7 T.

 Parameter scans. Mass scans. 

Monday, August 02, 2021, 23:47: IG1 @ 8.07e-7 T. FC0 = 3..8e-8 A.

Monday, August 02, 2021, 23:52:  Done for the day.

Tuesday, August 03, 2021, 07:34: Things were stable overnight. IG1 @ 7.92e-7 T. 

Parameter scans, and emittance meter troubleshooting.

Grid is fine.

Tuesday, August 03, 2021, 11:55: Emittance scans seem to work now( see e-log 891) 

Tuesday, August 03, 2021, 12:08: Done on-site. Continuing remotely. 

Emittance scan. Mass scans.

Tuesday, August 03, 2021, 20:21: Ramping TBHT to 315 A @ 1A/min. IG1 @ 8.2e-7 T.

Parameter scan. Mass scans. Emittances scans.

Tuesday, August 03, 2021, 22:55: IG1 @8.07e-6. Done for the day. Will continue tomorrow.

Wednesday, August 04, 2021:  Parameter scan. Mass scans. Emittances scans.

Data analysis on files generated so far. Efficiency as a function of temperature-voltage look similar.

Given that previous cathode heating current did not have emittance, I will go down to measure efficiency.

Thursday, August 05, 2021: Morning troubleshooting CANBUS signal with no luck (this is actually something good)

Mass scans. Parameter scans, and finally emittance scans at lower temperatures.

Thursday, August 05, 2021, 20:58: IG1 @ 7.35e-7 T. 

Friday, August 06, 2021: CANBUS analyzer up-and-running.

Parameter scan. Mass scans. Emittances scans.

Saturday, August 07, 2021, 06:00:  Found all my epics windows closed. Probably a network issue as I cannot connect from any of my pc's. Submitting a ticket.

 Saturday, August 07, 2021, 08:43: Reply from Steve McDonald says there are general network issues and someone is goin on-site to investigate the "network switch stack in the ISAC2 second floor"

Saturday, August 07, 2021, 10:12 : Communications restore after fix.

Saturday, August 07, 2021, 15:06: FC0 reading oscillates a lot and sometimes drop to 0. Mass scan shows almost no peaks without gas. With gas, the FC0  behaves the sames even thought 40Ar+ signal is 1e-8A and responds to the gas open/close.

Moreover, the RPM0s have an offset current. RPM0A is not showing beam.

I will turn the HV off in case there is weird dark current going on. 

Saturday, August 07, 2021, 17:29 : On-site

ISAC test stand PC lost connection to epics due to the same issue. Initiating striptools.

Nothing visible wrong on service cap nor around the ISAC test stand, however, FC0 still oscillates a lot.

I will change the signal cables to see if one controller can read from the other faraday cup.

 Things look better now (see entry 893)

Finished mass scans

Sunday, August 08, 2021, 00:35: Ramping TBHT to 300 A @ 4 A/min. IG1 @ 6.71e-7 T. 

Sunday, August 08, 2021:  Parameter scans, mass scans, emittance scans performed.

Sunday, August 08, 2021, 23:55: Checking other species given that  with TBHT=310 A I can see m=90, which I think it might be Ta++

Monday, August 09, 2021: TBHT increased to 315 A

Parameter scans, mass scans, and emittance scans performed.

Investigating the following species: O+, (H2O)+, Ar++, (N2)+/CO+, (O2)+,Ta++,(TaO)++ on masses 16,18,20,28,32,90,98, respectively.

Both the atomic, and molecular oxygen follow different tendencies wrt other species.

Tuesday, August 10, 2021, 09:57: TBHT @ 320 A. IG1 @ 6.53e-7T. 

Tuesday, August 10, 2021, 10:01: Increasing anode limit current to 200mA. All previous tests had 150 mA and the maximum current recorded was ~110mA. 

Tuesday, August 10, 2021, 11:42: Grid is fine (confirmed by Marla) 

Tuesday, August 10, 2021: Mass 60 observed, it might be (SiO2)+ coming from the coil jacket. The parameter scan shows that the ion current is only dependent on voltage. 

Wednesday, August 11, 2021. Mass scan, and parameter scan. For the first time I am measuring only FC0 with and without gas. I'm gonna investigate the higher peaks individually, likely they are H2O,O2,O,H2, and Ar

Thursday, August 12, 2021: All day measuring different ion currents with and without gas (H2,N,O,OH,H2O,N2/CO,O2).

Friday, August 13, 2021, 09:03: Currently measuring FCO with gas. 

 Friday, August 13, 2021, 10:42: On-site. Grid is fine

Friday, August 13, 2021, 19:50:Scans completed for different species, results seem consistent but required more in-depth. FC0 scans shows higher values towards high anode voltage and high coil current but not all species shows this behavior.

Friday, August 13, 2021, 19:51: Ramping tbht to 330 @ 1 A/min. 

Friday, August 13, 2021, 20:29L IG1@8.25e-7T. 

Saturday, August 14, 2021, 22:28: Parameter scans, mass scans. Some emittance scans unsuccessful.

Anode leakage current seems to creep a bit overnight. This could be an indication of a failure onset but I'll have to see. I won't increase the current remotely until being on-site

Sunday, August 15, 2021, 10:10: Anode leakage current has increased 10 mA overnight. 

Sunday, August 15, 2021, 20:43: Emittance scans for multiple anode/coil combinations. Visually there are differences on the geometrical emittance, not so much on the 90% intensity emittance. Requires proper  emittance  analysis.

Monday, August 16, 2021, 18:58: Data analysis and short summary. Systematic emittance measurements.

Request to add more PVs to control emittance and mass scans from jupyter notebook 

Tuesday, August 17, 2021, 10:22: On site. Grid is fine. Re-initianing epics as my pc reboot it.

Tuesday, August 17, 2021, 10:23: TBHT to 335A @ 1A/min. Anode leakage current =150 mA. IG1=6.51e-7T. Increase anode current limit to 250 mA.

Tuesday, August 17, 2021, 10:29: The grid is as bright as the cathode. This is the first time the grid shines this bright. 

Tuesday, August 17, 2021, 10:53: The grid looks normal at anode=200V. By making an anode sweep I was able to observe that at around 300 V there is an onset on how bright the anode get. Passing this voltage the grid start to shine and gets a maximum brightness when reaching 500V.

This seems to suggest that the power deposited on the grid is enough to cause substantial heating if it makes it as bright as the cathode. The maximum power into the anode body (at this cathode heating current (335A))  is 500V* 200mA=100W (just like a lightbulb)

Tuesday, August 17, 2021, 12:03: Done on-site. Will continue remotely. 

Tuesday, August 17, 2021, 20:19: Anode is drawing more current. During Ar+ scan, the maximum anode current registered was ~200 mA. Now is ~250 mA 

Schottky plot shows a tiny upwards kick.

Tuesday, August 17, 2021, 22:16: Once again, at the end of the scan the current increased. This time to 320 mA

Tuesday, August 17, 2021, 22:18: I think the grid will melt tonight  with anode/coil @ 200V/30A. 

Wednesday, August 18, 2021: Well, well, well. Grid didn't melt but the  anode leakage current has increased again. At some point the anode got current limited to 350 mA and from 490 V it drop to 470V.

Wednesday, August 18, 2021, 16:57: Increasing the anode limit current to 400 A.

Wednesday, August 18, 2021, 18:01: During the scan on FC0, the anode current went up to 400 mA so I increased to 500 mA, but I had to increase to 600 mA but it was still getting current limited. Scan aborted

Maybe now I am melting the grid 

I will run an FC0 scan with gas on while I'll go on-site to check the grid and the "anomalous" ionization..

Running a mass scan while I go on-site. Anode=200. Coil=90 A.

Wednesday, August 18, 2021, 19:42: Grid is melted. From the look of it half of the visible part collapsed into a blob while the other is gone (allowing to see the far backside of the target oven.

With this knowledge I can proceed with more aggressive tests in order to test the limit if the "anomalous" regime.

Wednesday, August 18, 2021, 23:24: After a mass scan with 0 V to check surfaces ionizes species I noticed there is a signal on mass ~ 137.5 which I am not sure what it is.

It might be Ba or a molecule but is coming from the transfer line as sweeping the voltage between 0 and 2 V changes the response but above this the signal is gone and reappears with 80 V.

Thursday, August 19, 2021, 08:08: mass ~137.5 disappeared. If I increased the anode voltage to 400 V or so some appears but quickly drops.

 Thursday, August 19, 2021, 11:35: Increased anode current limit to 800 mA.

Thursday, August 19, 2021, 14:08: Scan didn't cause an increased on leakage current. Maximum registered was around 200 mA. However, the contour plot looks different to the case when the grid was complete.

Thursday, August 19, 2021, 23:36: Finishing some scans at the current settings.

Thursday, August 19, 2021, 23:36: TBHT to 280A @ -1A/min. Tomorrow I will focused on temperature scans without caring much on emittance o mass composition. 

Friday, August 20, 2021, 11:28: Scans done for,280,285. Currently running 290 A.

The coil current dependence qualitatively follows the one from ISOLDE, in which a series of minimum and maxima occur and also vary a bit with voltage.

Friday, August 20, 2021, 13:34: Accidentally set TBHT to 226 A directly from 295 A. 

Friday, August 20, 2021, 13:36: Heating TBHT to 300 A @ 4A/min. 

Friday, August 20, 2021, 14:13: TBHT is at 295 A to check things are still the same. 

Friday, August 20, 2021, 23:46: TBHT @ 310 A. 

Saturday, August 21, 2021, 06:20: Scan on-going for TBHT 315 A. 

Saturday, August 21, 2021, 13:25: TBHT to 335 A. 

Saturday, August 21, 2021, 15:02: TBHT to 340 A. 

Saturday, August 21, 2021, 18:11: The voltage got current limited during the scan for 345 A. When setting the voltage to 0V, the anode seems to be shorted. 

Saturday, August 21, 2021, 22:46: Ramping down TGHT/TBHT to 0 (@-1A/min) but the short is still present. Currently  @ TGHT/TBHT 454/162 A. 

Sunday, August 22, 2021, 13:29: This morning the heaters reach 0 A but the anode remain current limited. I will proceed to turn off the TS to check tomorrow morning the ion source. 

Sunday, August 22, 2021, 13:31: IV4 closed.

 Sunday, August 22, 2021, 13:36: Sources off.

Sunday, August 22, 2021, 13:38: IG1 off

 Sunday, August 22, 2021, 13:38: Turbos off.

Monday, August 23, 2021, 07:19: Venting 

Monday, August 23, 2021, 08:30: Confirmed a short between target/cathode to anode/heatshield

Monday, August 23, 2021, 11:29: Confirmed that the anode power supply still works :) 

Tuesday, April 05, 2022, 13:57: Roughing. BV1B.

Tuesday, April 05, 2022, 14:04: BV1A on.

Tuesday, April 05, 2022, 14:28: TP1B on.

Tuesday, April 05, 2022, 14:36: TP1A on.

Tuesday, April 05, 2022, 14:46: IG1 on.

Wednesday, April 06, 2022, 07:42: Vacuum @ 2.50e-06T.

Wednesday, April 06, 2022, 07:44: Waterlines opened. Vacuum Remains stable.

Wednesday, April 06, 2022, 07:59: Cage fully closed up. Power/sources on.

Wednesday, April 06, 2022, 08:00: COIL / TGHT / TBHT @ 10 A manually. Check - Ok.

Wednesday, April 06, 2022, 08:02: Anode @ 50V - Ok.

Wednesday, April 06, 2022, 08:04: BIAS / EE / EZL @ 1 / -0.5 / 1 kV. Check - Ok.

Wednesday, April 06, 2022, 08:10: BIAS / EE / EZL @ 10 / -1 / 10 kV.

Wednesday, April 06, 2022, 08:16: BIAS / EE / EZL @ 30 / -1.5 / 13 kV. Ok. Vacuum @ 2.39e-06T.

Wednesday, April 06, 2022, 08:46: 1/2 hour. Stable.

Wednesday, April 06, 2022, 08:50: All sources off. PS off. Open Cage.

Wednesday, April 06, 2022, 08:54: Begin cycling source gas control.

Wednesday, April 06, 2022, 08:57: SV5 open.

Wednesday, April 06, 2022, 08:58: SV3 & SV4 open. Vacuum stable @2.32e-06T.

Wednesday, April 06, 2022, 09:02: Cage closed. Sources / PS  on. IV4 open.

Wednesday, April 06, 2022, 09:04: Auto-ramping TGHT / TBHT to 350 / 150 @ 2 A per min.

Wednesday, April 06, 2022, 09:05: Anode @ 50 V. Coil @ 10 A.

Wednesday, April 06, 2022, 09:10: Optics set.

Wednesday, April 06, 2022, 11:37: Gas lines closed. Abort ramping. TGHT / TBHT @ 306 / 150 A. HV lockout. Open cage.

***Gas bottles are not in the old configuration*** No gas.

Wednesday, April 06, 2022, 11:50: Begin Auto-cooling @ 2 A per min.

Thursday, April 07, 2022, 08:13: IG1 off. Turbo pumps off. Power off. 

Thursday, April 07, 2022, 09:17: Venting. 

Wednesday, March 29, 2023, 09:15: Roughing.

Wednesday, March 29, 2023, 12:22: TP1B on.

Wednesday, March 29, 2023, 12:40: TP1A on.

Wednesday, March 29, 2023, 13:03: IG1 on.

Thursday, March 30, 2023, 08:23: Vacuum @ 3.42e-07T.

Thursday, March 30, 2023, 08:24: Waterline FS#5 open. Vacuum ok.

Thursday, March 30, 2023, 08:31: Manual Checks:

TGHT / TBHT @ 5 / 5 A ok

BIAS / EE / EZL @ 1 / 0.5 / 1 kV ok.

Thursday, March 30, 2023, 08:32: Anode @ 100 V ok. Coil @ 10 A ok.

Thursday, March 30, 2023, 08:56: Auto-ramping TGHT / TBHT to 350 / 100 A @ 2 A per minute.

Thursday, March 30, 2023, 11:45: Abort heating. TGHT / TBHT @ 233 / 100 A.

Thursday, March 30, 2023, 13:53: Auto-cooling @ 2 A per min 

Thursday, April 13, 2023, 11:07: New TMS:RP2 roughing pump installed: Elog 961

Thursday, April 13, 2023, 12:06: Gas lines opened. Ar gas @ 50 kPa

Thursday, April 13, 2023, 13:34: IG1 @ 2.27e-07T / IG6 @ 6.46e-06T. Open IV4

Thursday, April 13, 2023, 13:35: IG1 @ 3.66e-07T / IG6 @ 6.31e-06T7.

Thursday, April 13, 2023, 13:39: IG1 @ 4.03e-07T / IG6 @ 6.24e-06T. Power / Sources on.

Thursday, April 13, 2023, 13:42: Optics still require vacuum below 5.01e-06T on IG6. Wait.

Friday, April 14, 2023, 06:30: Optics still not configuring on TMS:Q2,Q5 or TMS:CB1. Controls group notified. 

Friday, April 14, 2023, 06:42: Auto-ramping TGHT / TBHT to 350 / 150 A @ 2A per minute.  

Friday, April 14, 2023, 11:26: Optics fixed / set. Continue ramping to 580 / 270 A @ 2A per minute.

Friday, April 14, 2023, 12:27: Halt & hold ramping. Vacuum @ 5.01e-06T. 

Friday, April 14, 2023, 13:54: Ramping continued. 

Friday, April 14, 2023, 14:57: Halt & hold ramping. Vacuum @ 5.01e-06T. 

Friday, April 14, 2023, 15:38: Ramping continued. 

Friday, April 14, 2023, 15:47: TGHT / TBHT @ 580 / 290 A.

BIAS / EE / EZL @ 30 / -1.5 / 13 kV. Anode @ 100 V. Coil @ 10 A

Friday, April 14, 2023, 15:51: Anode @ 400 V. 

Friday, April 14, 2023, 15:52: Anode back to 300 V / 41 mA. . Limited around 350 V. Current limit 50 mA.

Friday, April 14, 2023, 15:55: Adjusted current limit. Anode @ 400 V / 72.039 mA.

Friday, April 14, 2023, 15:58: Adjust Anode current limit further. 300 mA. 

Friday, April 14, 2023, 16:06: Anode stable. Reduced current limit to 150 mA. Anode @ 400 A / 91.575 mA

Friday, April 14, 2023, 16:35: Spark* during mass scan. Current limited on the Anode. Reset optics as well.  

Friday, April 14, 2023, 16:41: Reduced Anode to 100 V /  30.525 mA. Current limit reduced to 100 mA. 

Friday, April 14, 2023, 19:45: Auto-Cooling @ 2 A per min. HV, Coil, & Anode to 0. 

Monday, April 17, 2023, 07:35: Coil manually tapped up to 80 A @ 8 A per min.

Monday, April 17, 2023, 08:39: IV4 closed. 

Monday, April 17, 2023, 08:44: Power ? Sources off.

Monday, April 17, 2023, 08:45: IG1 off. Turbos pump TP1B & TP1A off.

Monday, April 17, 2023, 13:24: Venting.

Monday, April 17, 2023, 13:26: Odd, the venting is going very slowly. "Aiding" the venting process.

Target oven was inspected post TS. Risks of cracking due to crystallization.

Anode remade with a ceramic "elbow-cube". Empty target oven in use for testing.

Wednesday, April 26, 2023, 08:44: BV1B open. Roughing.

Wednesday, April 26, 2023, 08:46: BV1A open

Wednesday, April 26, 2023, 09:15: TP1B on.

Wednesday, April 26, 2023, 09:21: TP1A on.

Wednesday, April 26, 2023, 09:31: IG1 on.

Wednesday, April 26, 2023, 10:43: Vacuum @ 2.33e-06T.

Wednesday, April 26, 2023, 10:51: Waterline FS#5 opened. Vacuum stable.

Wednesday, April 26, 2023, 11:00: Gases set. IV4 opened. (Timed out repeatedly. Reset w/ screwdriver)

Wednesday, April 26, 2023, 11:16: System ready check - OK. Manually set.

TGHT / TBHT @ 5 / 5 A

BIAS / EE / EZL @ 1 / -0.5 / 1 kV

Anode @ 100 V - 7.326mA

Coil @ 10 A.

Wednesday, April 26, 2023, 11:19: Optics set after reset.

Wednesday, April 26, 2023, 11:57: System tapped back down. Hold off for better vacuum. Vacuum @ 1.26e-06T. 

Thursday, April 27, 2023, 07:21: Vacuum @ 3.57e-07T

Thursday, April 27, 2023, 07:32: Tapped up coil to 70 A @ 7 A per min. Hold. Vacuum @ 3.68e-07T.

Thursday, April 27, 2023, 07:42: Vacuum @ 4.96e-07T. Tap down coil @ 7 A per min.

Thursday, April 27, 2023, 07:55: Auto-ramp TGHT / TBHT to 200 / 150 A @ 2 A per min.

Thursday, April 27, 2023, 09:47: TGHT / TBHT @ 200 / 150 A.

Thursday, April 27, 2023, 10:00: Tap up Anode in steps @ 20 v per 20 seconds.

Anode @ 100 V = 4.884 mA

Anode @ 200 V = 7.326 mA

Anode @ 300 V = 10.989 mA

Anode @ 400 V = 13.431 mA

Thursday, April 27, 2023, 10:12: BIAS / EE / EZL @ 10 / -1.0 / 5 kV.

Thursday, April 27, 2023, 10:21: Auto-ramp TGHT / TBHT to 400 / 200 A @ 2 A per min.

Thursday, April 27, 2023, 11:43: Anode tapped down to 100 V -  8.547mA. Some instability noted.

Thursday, April 27, 2023, 12:17: Auto-ramp TGHT / TBHT to 580 / 290 A @ 2 A per min.

Thursday, April 27, 2023, 12:18: Anode to 20 V.

Thursday, April 27, 2023, 14:09: Tap up Anode in steps @ 20 v per 20 seconds.

Anode @ 100 V = 9.768

Anode @ 200 V = 13.431 mA

Anode @ 300 V = 15.873 mA

Anode @ 400 V = 18.315 mA

Thursday, April 27, 2023, 14:19: BIAS / EE / EZL @ 30 / -1.5 / 13 kV.

Thursday, April 27, 2023, 14:50: Mass & wire scans complete.

Thursday, April 27, 2023, 21:52 : Anode sat at 400V for ~8hrs. One spark early on when HV sparked, otherwise stable drawing ~18mA. Ramped anode to zero and BIAS/EL down to 10/5 for the night (Carla).

Friday, April 28, 2023, 07:01: Auto-cooling TGHT / TBHT @ 2 A per minute.  

Friday, April 28, 2023, 13:05: HV to 0. SV5 closed.  

Monday, May 01, 2023, 07:34: Power / Sources off. IG1 off. TP1A & TP1B off.

New TiC LP-FEBIAD Target installed.

Monday, May 01, 2023, 14:23: Roughing.

Monday, May 01, 2023, 21:42: TP1B on 

Monday, May 01, 2023, 21:49: TP1A on. 

Monday, May 01, 2023, 21:57: IG1 on. 

Tuesday, May 02, 2023, 08:39: Vacuum @ 1.16e-06T. Waterline FS#5 opened.

Tuesday, May 02, 2023, 08:48: Power / sources on. Source gas set. SV5 remains open.

Tuesday, May 02, 2023, 09:00: Optics set.

Tuesday, May 02, 2023, 09:13: System ready check - OK. Manually set.

TGHT / TBHT @ 5 / 5 A

BIAS / EE / EZL @ 1 / -0.5 / 1 kV

Anode @ 100 V - 10.989 mA

Coil @ 10 A.

Tuesday, May 02, 2023, 10:12: Coil @ 70 A. Tapped up manually @ 7 A per minute.  

Tuesday, May 02, 2023, 12:20:

Tap up Anode in steps @ 20 v per 20 seconds.

Anode @ 100 V = 10.989 mA

Anode @ 200 V = 12.210 mA

Anode @ 300 V = 12.210 mA

Anode @ 400 V = 13.431 mA 

Tuesday, May 02, 2023, 12:36: Anode @ 20 V. 

Tuesday, May 02, 2023, 12:53: BIAS / EE / EZL @ 10 / -0.5 / 5 kV

Wednesday, May 03, 2023, 04:30: Auto-ramping TGHT / TBHT to 550 / 280 A @ 1 A per minute. 

Wednesday, May 03, 2023, 10:42: BIAS / EE / EZL @ 30 / -1.5 / 13 kV.

TGHT / TBHT @ 360 / 280 A. Ramping ongoing. 

Wednesday, May 03, 2023, 14:04: TGHT / TBHT @ 550 / 280 A

Wednesday, May 03, 2023, 14:10: Anode tapped up to 100 V @ 20 V per 20 seconds.

Wednesday, May 03, 2023, 14:25: Large spark*. Reset Optics.  

Wednesday, May 03, 2023, 14:46: Mass & wire scans complete. 

Wednesday, May 03, 2023, 17:05: Anode & coil checks complete. Auto-cooling of TGHT / TBHT @ 1 / 2 A per minute.

Wednesday, May 03, 2023, 22:51: IV4 closed. 

Thursday, May 04, 2023, 07:35: SV5 closed. Sources / Power off.

Thursday, May 04, 2023, 07:37: IG1 off. TP off.

Thursday, May 04, 2023, 09:17: Venting.

 Thursday, March 14, 2024, 15:39: Roughing

Thursday, March 14, 2024, 16:20:TP1B on

Thursday, March 14, 2024, 16:40: TP1A on

Thursday, March 14, 2024, 16:51: IG1 on

Thursday, March 14, 2024, 17:28: Waterline FS#5 open

 Friday, March 15, 2024, 13:19:  Gradually increased BIAS to 25kV, then up to 50kV more slowly. Accompanied by increase in EZL voltage.

Friday, March 15, 2024, 13:50: Periodically increased BIAS voltage in 100V increments watching for sparks. Decrease BIAS whenever sparks. settled at 51.5 kV (cannot increase further without sparking), left at high voltage.

Friday, March 15, 2024, 15:48: Decreasing BIAS to 10kV 

Friday, March 15, 2024, 16:28: ran coil at 80A until vacuum recovered. 

Friday, March 15, 2024, 19:29: decrease coil to 0A, decrease BIAS to 0V

Monday, March 18, 2024, 10:08 increasing TGHT/TBHT to 440A/290A at 1A/30s

Monday, March 18, 2024, 16:00  increasing COIL to 40A, waiting for vacuum to return to normal 

Monday, March 18, 2024, 21:05:  decreasing COIL to 0A

Tuesday, March 19, 2024, 09:35: increased COIL to 40A.

Tuesday, March 19, 2024, 10:17: increased TDH:ANODE (cathode mode) to (-)200V

 Tuesday, March 19, 2024, 10:20: increasing BIAS to 30kV

Tuesday, March 19, 2024, 13:12:  turned on gas. vacuum jumped up and tripped everything off.  gas was immediately turned back off. TGHT and TBHT were off for approximately 1 minute before being turned back on.

Tuesday, March 19, 2024, 13:46:   cooling. need to investigate possible leaks. 

Tuesday, March 19, 2024, 15:58: TGHT and TBHT at 0A. Turbo pumps turned off. waiting to slow before venting.

 Tuesday, March 19, 2024, 16:20 venting

Wednesday, March 20, 2024, 14:47: Target assembly was removed today and the tube from the inlet to the calibrated leak was replaced. Now reinstalled, roughing. Gas was turned on at ~0.2 bar during roughing. No effect on vacuum.

           water cooling also turned on.

Wednesday, March 20, 2024, 14:53 Turbo pumps turned on.

Wednesday, March 20, 2024, 20:24: begin ramping TGHT TBHT to 440/290A at 1A/30s

Thursday, March 21, 2024, 09:54:    Target heated, vacuum good.   Tested gas to ensure there is no noticeable effect on vacuum. Lines subsequently vented through the line roughing pump.

Thursday, March 21, 2024, 09:55    Optics switched on. increasing cathode to 200V and coil to 40A. Watching vacuum, checking beam tune 

Thursday, March 21, 2024, 10:20   ramping BIAS to 30kV 

 Thursday, March 21, 2024, 11:14 : scanned, data recorded

Thursday, March 21, 2024, 11:14  cathode reduced to 100V. scanned 

Thursday, March 21, 2024, 11:32:  coil reduced to 20A. scanned. 

Thursday, March 21, 2024, 11:50  cathode increased to 200V. scanned 

Thursday, March 21, 2024, 12:07 coil increased to 40A.  Argon gas on (-0.8bar at regulator). scanned 

Thursday, March 21, 2024, 12:31  reducing bias to 0kV 

Thursday, March 21, 2024, 13:02 argon regulator pressure increased to -.64bar

Thursday, March 21, 2024, 13:05 increasing bias to 30kV

Thursday, March 21, 2024, 13:15:  vented lines, scanning

 Thursday, March 21, 2024, 13:35 gas on. scanning

 Thursday, March 21, 2024, 15:05 cathode at 100V, scanning

Thursday, March 21, 2024, 15:20 coil at 20A, scanning

 Thursday, March 21, 2024, 15:55 coil off. scanning

Thursday, March 21, 2024, 16:10 cathode off, scanning

 Thursday, March 21, 2024, 17:23  - bias down. changing gas pressure

Friday, March 22, 2024, 09:08   increasing bias, checking tune,  increasing cathode to 200V, coil to 40A, EZL to 13kV

Friday, March 22, 2024, 09:48  gas vented, scanned, gas on, scanned.

Friday, March 22, 2024, 09:48  decreasing bias to 0V, changing gas pressure.

Friday, March 22, 2024, 10:12 pressure at 1bar.abs.  increased bias to 30kV, checked beam tune, cathode to 200V, coil to 40A, EZL to 13kV

Friday, March 22, 2024, 10:13   gas on. scanning 

Friday, March 22, 2024, 10:33   decrease bias, changing pressure. 

Friday, March 22, 2024, 10:57 gas line pressure at 1.5bar.a.   increasing bias to 30kV, checking beam tune, cathode to 200V, coil to 40A, EZL to 13kV

Friday, March 22, 2024, 11:42 decreased bias, changing pressure.

Friday, March 22, 2024, 11:52 gas line pressure at ~2bar.a  increasing bias to 30kV, checking beam tune, cathode to 200V, coil to 40A, EZL to 13kV

Friday, March 22, 2024, 15:40  bias down to 0V. reducing TGHT TBHT to 0/0

 Monday, March 25, 2024, 09:30 Turbo pumps turned off

 Monday, March 25, 2024, 10:00 venting chamber, purged water lines.

 Monday, March 25, 2024,11:00 removed target assembly

 Monday, March 25, 2024,13:00 replaced target assembly, began roughing

 Monday, March 25, 2024,13:50: turned on water cooling. Vacuum stable. Turned on turbo pumps.

 Monday, March 25, 2024, 15:16   turned on optics elements, cathode to 200V, coil to 80A, EZL to 13kV. monitoring vacuum. Gas leak test shows no effect on vacuum (5e-6T).

Monday, March 25, 2024, 15:22: Ramping TGHT TBHT to 440/290A at 1A/30s

 Tuesday, March 26, 2024, 10:32 Ran mass scans with gas off and on. 

Tuesday, March 26, 2024, 10:32 scanning parameter space for optimal beam output - cathode voltage and coil current.

 Tuesday, March 26, 2024, 15:29 ramping TBHT to 300A, scanning

 Tuesday, March 26, 2024, 16:10 ramping TBHT to 310A, scanning

 Tuesday, March 26, 2024, 16:40 ramping TBHT to 320A, scanning

 Wednesday, March 27, 2024, 09:25 - ramping bias to 30kV

Wednesday, March 27, 2024, 09:40 scanning cathode / coil parameter space to optimize output --- highest output at 200V 60A - 200V 62A - magnet drifted and is not right at Ar peak. corrected. scan repeated

Wednesday, March 27, 2024, 10:31 scanning cathode / coil parameter space to optimize output 

Wednesday, March 27, 2024, 11:02   mass scan with 200V 62A cathode coil.

Wednesday, March 27, 2024, 11:17 - lines evacuated. mass scan.

 Wednesday, March 27, 2024, 11:40 bias to 0V.  change gas pressure

 Wednesday, March 27, 2024, 11:50 bias to 30kV.  mass scan

 Wednesday, March 27, 2024, 12:10 bias to 0V.  change gas pressure

 Wednesday, March 27, 2024, 12:21 bias to 30kV.  mass scan

 Wednesday, March 27, 2024, 12:31 bias to 0V.  change gas pressure

 Wednesday, March 27, 2024, 12:43 Ramping bias to 30kV. 

Wednesday, March 27, 2024, 15:00 bias to 0V. changing pressure to .5 bar.

Wednesday, March 27, 2024, 15:13 bias at 30kV.  

Wednesday, March 27, 2024, 15:13 increasing TGHT to 468A (~2250W) - mass scan - monitoring vacuum. stable at 6e-7T

Wednesday, March 27, 2024, 15:39 increasing TGHT to 490A (~2500W) - mass scan - monitoring vacuum. stable at 6e-7T

Wednesday, March 27, 2024, 16:23 reduced cathode voltage to 50V to record the electron current (17.09mA). mass scan taken with coil at 35A

Wednesday, March 27, 2024, 16:35 ramping down BIAS to 0V.

 Wednesday, March 27, 2024, 16:38  decreasing TGHT TBHT to 0A 0A at 1A/30s in preparation to switch to anode mode in the morning.

 Thursday, March 28, 2024, 13:59 - Switched to anode mode

Thursday, March 28, 2024, 13:59 - ramping TGHT and TBHT to 100A at 1A/30s

Thursday, March 28, 2024, 14:37 increasing BIAS to 30kV 

 Thursday, March 28, 2024, 14:47 - ramping TGHT/TBHT to 440A/290A at 1A/7s

Thursday, March 28, 2024, 15:56    mass scan with 200V 62A cathode coil. gas on at 0.5 bar. (bias at 29.8kV)

Thursday, March 28, 2024, 15:56    mass scan with 200V 62A cathode coil. gas vented. (bias at 29.8kV)

Thursday, March 28, 2024, 16:29     ramping TGHT/TBHT to 490A/320A at 1.4A/10s

Thursday, March 28, 2024, 16:36     mass scan with 200V 62A cathode coil. gas on at 0.5 bar. (bias at 29.8kV)

Thursday, March 28, 2024, 16:56     mass scan with 200V 62A cathode coil. gas vented. (bias at 29.8kV)

Thursday, March 28, 2024, 17:13      dropping bias to 0

Thursday, March 28, 2024, 17:14      cooling tght and tbht at 1A/30s

Tuesday, April 09, 2024, 15:25: Roughing.

Wednesday, April 10, 2024, 05:41: TP1B on. 

Wednesday, April 10, 2024, 05:47: TP1A on. 

Wednesday, April 10, 2024, 06:01: IG1 on. 

Wednesday, April 10, 2024, 12:21: Waterline FS#5 open. Vacuum stable @ 1.23e-06T.

Wednesday, April 10, 2024, 12:25: Power / sources on.

Wednesday, April 10, 2024, 12:32: TGHT / TBHT @ 5/5A tapped up & back down manually. Ok.

Wednesday, April 10, 2024, 12:33: Anode @ 25 V, Coil @ 10 A. Tapped up & down manually. Ok.

Wednesday, April 10, 2024, 12:35: BIAS / EE / EZL @ 1 / -0.5 / 1 kV. Tapped up & down manually. Ok.

Wednesday, April 10, 2024, 12:37: Vacuum @ 1.19e-06T. Ok, but will allow to drop further.

Thursday, April 11, 2024, 10:21: Gas lines open.

Thursday, April 11, 2024, 10:34: BIAS / EE / EZL @ 30 / -1.5 / 13 kV.

Thursday, April 11, 2024, 10:38: BIAS / EE / EZL @ 40 / -2.0 / 17 kV.

Thursday, April 11, 2024, 10:41: Significant sparking for about 5 seconds. BIAS / EE / EZL @ 43 / -2.0 / 19 kV.

Thursday, April 11, 2024, 10:42: BIAS / EE / EZL @ 45 / -2.0 / 19 kV.

Thursday, April 11, 2024, 10:46: BIAS / EE / EZL @ 47.5 / -2.2 / 22 kV. Sparking again. On the spark gap.

Thursday, April 11, 2024, 10:56: BIAS / EE / EZL @ 50 / -2.5 / 25 kV.

Thursday, April 11, 2024, 11:26: 30 minutes @ 50 kV. 2 sparks in that time. The second spark tripped the optics & IG6. They were reset.

Thursday, April 11, 2024, 11:31: BIAS / EE / EZL @ 30 / -1.5 / 13 kV.

Thursday, April 11, 2024, 11:38: HV tapped to 0 kV.

Thursday, April 11, 2024, 11:39: Vacuum @ 8.27e-07T.

Thursday, April 11, 2024, 13:03: BIAS / EE / EZL @ 30 / -1.5 / 13 kV. Vacuum @ 8.16e-07T.

Thursday, April 11, 2024, 13:26: Coil @ 80 A. Tapped up manually at 4 A per min approx.

Thursday, April 11, 2024, 13:28: Vacuum @ 1.01e-06T

Thursday, April 11, 2024, 13:57: Vacuum @ 2.96e-06T

Thursday, April 11, 2024, 14:19: Coil @ 0 A.

Thursday, April 11, 2024, 14:21: Anode @ 100 V.

Thursday, April 11, 2024, 14:22: Anode @ 200 V.

Thursday, April 11, 2024, 14:24: Anode @ 500 V.

Thursday, April 11, 2024, 14:28: Anode @ 0 V.

Thursday, April 11, 2024, 14:32: HV to 0 kV.

Friday, April 12, 2024, 06:30: Auto-ramping TGHT / TBHT to 580 / 290 A @ 2 A per min. 

Friday, April 12, 2024, 13:23: Auto-ramping aborted. TGHT @ 556 A, Vacuum @  4.94e-06T. Allow 20 min for stabilization.

Friday, April 12, 2024, 13:44: Auto-ramping TGHT to 580 A @ 2 A per min. Vacuum @ 4.57e-06T. 

Friday, April 12, 2024, 14:15: Aborted auto-ramp. Vacuum @ 5.20e-06T. Will manually tap up. 

Friday, April 12, 2024, 14:32: BIAS / EE / EZL @ 30 / -1.5 / 13 kV. Vacuum @ 5.31e-06T. The extraction electrode is acting up. Doubling the voltage on what is input. Add 50 V on the slider, 100 V will go to the readback. 

Friday, April 12, 2024, 14:49: HV back to 0 kV. 

Friday, April 12, 2024, 15:12: EE Troubleshooting. Cage open & multiple tests to adjust the voltage.

Friday, April 12, 2024, 15:19: Auto-cooling @ -2 A per min 

https://elog.triumf.ca/TIS/Test-Stand/1003

EE Issue resolved. TS closed up.

Wednesday, April 17, 2024, 14:08: IV4 opened. Vacuum @ 5.26e-07T.

Wednesday, April 17, 2024, 14:12: TGHT / TBHT manually tapped up to 5 / 5 A.

Wednesday, April 17, 2024, 14:13: BIAS / EE / EZL @ 2.5 / -1.0 / 1.0 kV. Ok.

Wednesday, April 17, 2024, 14:15: Anode to 100 V. Ok. Coil PS is still.

Wednesday, April 17, 2024, 14:19: Rear cage reopened. Coil PS on. Coil @ 5 A. Ok. Gas on in the morning.

Wednesday, April 17, 2024, 14:21: Auto-ramping TGHT / TBHT to 350 / 150 A @ 2 A per min. Coil back to 0 A.

Thursday, April 18, 2024, 05:57: Auto-ramping TGHT / TBHT to 580 / 290 A @ 2 A per min. 

Thursday, April 18, 2024, 08:26: Gas lines purged & reopened full of Ar.

Thursday, April 18, 2024, 08:39: Optics set with common tune.

Thursday, April 18, 2024, 08:48: BIAS / EE / EZL @ 30 / -1.5 / 13 kV.

Thursday, April 18, 2024, 08:50: Begin mass & wire scans w/o Anode & Coil

Thursday, April 18, 2024, 08:55: MB1 appears to be tripped & out of sync.

Thursday, April 18, 2024, 08:57: Switched MB1 PS off, controller off. Restart them. PS on, then controller. Reset on epics & Can Diagnostics TMS:HallMB1 (cfg)

Thursday, April 18, 2024, 08:59: MB1 ready. Continue testing / mass scan.

Thursday, April 18, 2024, 09:37: Anode to 100 V. Coil to 20 A.

Thursday, April 18, 2024, 10:15: Set optics to Dave's previous tune.

Thursday, April 18, 2024, 10:49: Primary mass & wire scans set complete.

Thursday, April 18, 2024, 11:01: Anode & Coil to 0. Scanning w/ Dave's previous tune.

Thursday, April 18, 2024, 11:52: BIAS / EE / EZL to 0 kV. Gas lines closed. IV4 closed.

Thursday, April 18, 2024, 11:53: Begin auto-cooling @ 2 A per min.

Friday, April 19, 2024, 06:56: Power off. IG1 off. TP1B & TP1A off.  

Friday, April 19, 2024, 09:03:   VV1 open -  venting 

 Friday, April 19, 2024, 11:32:   assembly installed in test stand.  VV1 closed, pumping down

Friday, April 19, 2024, 11:56:   TP1A and TP1B on. 

Friday, April 19, 2024, 12:34:   water cooling on. no effect on vacuum.

Friday, April 19, 2024, 12:34:  Argon gas set to 0.5 bar. No effect on vacuum.

Monday, April 22, 2024, 09:24  beginning TGHT TBHT ramp to 440A/290A at 1A/30s.    COIL increased to 80A for conditioning. vacuum monitored.

Monday, April 22, 2024, 09:47:   vacuum peaks at ~8e-7 T.

Monday, April 22, 2024, 10:49  vacuum recovered and stable at  4.2e-7 T. 

Monday, April 22, 2024, 10:49  TGHT TBHT ramp rate toward 440/290 increased to 1.4A/10s.  COIL increased to 90A for conditioning. vacuum continues to be closely monitored.

 Monday, April 22, 2024, 11:39  TGHT TBHT have reached 440/290.  Waiting for vacuum to drop to stable value. Currently at 1.12e-6 T.

 Monday, April 22, 2024, 13:10:    vacuum stable at 9.9e-7 T

Monday, April 22, 2024, 13:11   increasing bias to 30kV 

Monday, April 22, 2024, 14:30   Unintentionally, TBHT had been increased to 230 instead of 290. Increasing to 290. 

Monday, April 22, 2024, 14:40.  BIAS sparking. Decreasing bias and increasing COIL back to 90A to condition. (spark frequency approximately 1/min)

 Monday, April 22, 2024, 15:12   increasing TGHT TBHT to 490/320 for conditioning   -  monitoring vacuum and bias closely

Monday, April 22, 2024, 15:23   prior to vacuum recovering, bias sparked again. decreasing to 25kV while vacuum recovers. 

 Monday, April 22, 2024, 15:37 vacuum plateaued at 2.5e-6T

 Monday, April 22, 2024, 16:50 Vacuum significantly decreased to ~1.5e-6.  increased bias to 30kV to observe argon beam activity. looks normal. data to be collected tomorrow after vacuum down further. Sparks were still observed at 30kV although significantly less frequently. (1/5min)

 Monday, April 22, 2024, 16:52    decreasing bias to 0 V

 Tuesday, April 23, 2024, 09:24  Vacuum at 9.6e7 T.  decreasing COIL to 0, increasing bias to 30 kV

Tuesday, April 23, 2024, 09:51   BIAS at 30kV, no sparks seen. 

 Tuesday, April 23, 2024, 09:58.  Argon gas on. COIL at 40A, ANODE at 200V. Using short mass scan to find Ar-40 peak. 

Tuesday, April 23, 2024, 10:33:   ran degaussing script in anode mode - measure_id=6018

Tuesday, April 23, 2024, 10:36  COIL set to 80A, ANODE at 340V, BIAS at 29 660 V.  

Tuesday, April 23, 2024, 10:37 mass scan 

 Tuesday, April 23, 2024, 10:57 closed sv4, open sv1. to pump down argon gas lines. then closed sv5 and sv1. 

Tuesday, April 23, 2024, 10:57   mass scan

 Tuesday, April 23, 2024, 11:19   TGHT TBHT decreased to 440 290

Tuesday, April 23, 2024, 11:35  mass scan

Tuesday, April 23, 2024, 11:49    turned argon gas back on

Tuesday, April 23, 2024, 11:50    mass scan 

Tuesday, April 23, 2024, 12:13     decreasing bias to 0 V

Tuesday, April 23, 2024, 12:33   decreasing TGHT TBHT to 100A at 1.4A/10s 

 Tuesday, April 23, 2024, 13:29   decreasing TGHT TBHT to 0A at 1A/30s

 Tuesday, April 23, 2024, 14:13   increasing bias to test HV

Tuesday, April 23, 2024, 15:00   when bias was at ~50kV, epics shut down at the test stand computer. Internet disconnected. there were two sparks over ~10min at 50kV, but there was no spark at the same time as the epics shut down

Tuesday, April 23, 2024, 15:05  It appears that this also actuated BV1B and BV6, then turning off TP1B and TP6 turbo pumps.

Tuesday, April 23, 2024, 15:16:  continuing to increase HV remotely, while monitoring closely for any sparks. the HV appears to be stable. 

Tuesday, April 23, 2024, 15:20  at 54.6 kV, the bias current rapidly increased from 0.02mA to 0.135mA. There was no decrease in voltage and no accompanying spark. HV was decreased until current dropped, before increasing HV again.

Tuesday, April 23, 2024, 16:01  decreased bias to 0V. 

Tuesday, April 23, 2024, 16:01   Turbo pumps restarted. 

 Wednesday, April 24, 2024, 09:25    TP1B and TP1A off. winding down to begin venting

 Wednesday, April 24, 2024, 10:47    VV1 open. venting.

Friday, May 17, 2024, Spare FEBIAD Development target installed

Friday, May 17, 2024, 17:00: Roughing

Friday, May 17, 2024, 17:38:  TP1B started.

Friday, May 17, 2024, 17:43 TP1B Green. OK.

Friday, May 17, 2024, 17:46 : TP1A on.

Friday, May 17, 2024, 17:54 : TP1A Green. OK.

 Tuesday, May 21, 2024, 09:47 :   TP1A and TP1B switched off. Source tray calibrated leak to be removed.

 Tuesday, May 21, 2024, 10:13 :   VV1 open for venting to atmospheric pressure.

Tuesday, May 21, 2024, 11:26 :  Source tray calibrated leak removed, target calibrated leak connected to gas line. Chamber closed, roughing valves open. Roughing down.

 Tuesday, May 21, 2024, 12:02  TP1B on

Tuesday, May 21, 2024, 12:04: TP1A on. 

 Tuesday, May 21, 2024, 15:12  gradually raising BIAS/EL/EE voltages to 50kV/25kV/2kV.

Tuesday, May 21, 2024, 15:58  increasing BIAS to 50+kV, watching for sparks.

Tuesday, May 21, 2024, 16:38: voltage stable at 55kV. after 10 minutes, of high voltage with no sparks, dropping the voltages to 0V.

Wednesday, May 22, 2024, 11:36:  increasing voltage BIAS/EL/EE to 30kV/15kV/1.5kV.

Wednesday, May 22, 2024, 11:56 gradually increasing COIL to 80A, letting vacuum recover as necessary. 

Wednesday, May 22, 2024, 13:31:  COIL to 90A, recovering vacuum.

 Wednesday, May 22, 2024, 16:58 increasing TGHT TBHT to 440A/290A at 1A/30s. reducing COIL to 0A and voltages to 0V overnight

Thursday, May 23, 2024, 11:14 :  increasing voltage BIAS/EL/EE to 30kV/13kV/1.5kV.

Thursday, May 23, 2024, 11:33:  Sensor on beam line vacuum TMSIG6 not working. reports bad vacuum, despite both TMSTP6 TMSTP2 running at full speed. Likely that vacuum is at appropriate level.

Thursday, May 23, 2024, 11:35: turning on optics and confirming correct tune.  --- cannot do this due to interlock on TP6.  investigating problem. -- switched to filament 2 on control panel

Thursday, May 23, 2024, 13:14:  after setting magnet to argon-40, running degaussing script for coil / anode optimization  - measure_id= 6220.  heat map at bottom. . optimal point at 120V 40A (local maximum)

Thursday, May 23, 2024, 13:45:  allowing vacuum to recover after scan. vacuum during scan was approximately 4e-6 T

Thursday, May 23, 2024, 13:57 running mass scan with gas on -  2024-05-23-14-25 LP FEBIAD backup leak 1.txt

Thursday, May 23, 2024, 14:29 mass scan gas off (purged) - 2024-05-23-15-03 LP FEBIAD backup leak 2.txt

Thursday, May 23, 2024, 15:04   increasing tght tbht to 490A 320A 

Thursday, May 23, 2024, 15:26:  when at TGHT TBHT = 461A/313A, the anode power supply began current limiting (shorted to hvc)

Thursday, May 23, 2024, 15:28  cooling to 460A/310A

Thursday, May 23, 2024, 15:35  cooling to 450A/300A 

 Thursday, May 23, 2024, 15:44  stopped cooling at 455A/305A as the anode became UNshorted.

Thursday, May 23, 2024, 16:19  mass scan with gas off - 2024-05-23-16-18 LP FEBIAD backup leak 3.txt

Thursday, May 23, 2024, 16:21   gas on - mass scan -  2024-05-23-16-51 LP FEBIAD backup leak 4.txt

Thursday, May 23, 2024, 16:52 :  increasing TGHT TBHT again to test anode shorting threshold:  - shorted at: 458A/308A.  then decreased to 450A/300A, did not UNshort until after a few minutes at that current.  shorted when increased to 456/306

Thursday, May 23, 2024, 17:22   decreasing voltages to 0V

 Thursday, May 23, 2024, 11:14 :  increasing voltage BIAS/EL/EE to 30kV/13kV/1.5kV.

 Tuesday, May 28, 2024, 12:59  cooling target to 0A. will remove target to attempt fix on anode short.

 Tuesday, May 28, 2024, 17:17   TGHT TBHT at 0A. TP1A and TP1B off.

Anode short repaired (Should be :) )

Thursday, May 30, 2024, 15:56: Roughing.

Thursday, May 30, 2024, 16:10: Waterline FS#5 open. Vacuum ok & roughing down.

Bypassed IG1. TGHT / TBHT @ 5 A. Ok.

Anode to 100 V. Ok.

Thursday, May 30, 2024, 16:12: TGHT / TBHT / Anode to 0. Bypass removed.

Thursday, May 30, 2024, 16:26: TP1B on.

Thursday, May 30, 2024, 16:33: TP1A on.

Thursday, May 30, 2024, 16:41: IG1 on.

Friday, May 31, 2024, 08:50: Anode to 400 V. OK. Tapped back down. Vacuum @ 5.07e-07T 

Friday, May 31, 2024, 09:12   increasing TGHT TBHT to 440 230A at 1A/30s- dn

 Friday, May 31, 2024, 10:20  at ~130A, increased heating rate to 1.4A/10s - dn

 Friday, May 31, 2024, 11:22  anode increased to 200V, TGHT TBHT at 440 230A.  increasing TBHT to 290A

Friday, May 31, 2024, 11:38  ANODE shorted to hvc at TBHT=286A

Friday, May 31, 2024, 11:39  decreased TBHT to 285A. waiting to reestablish ANODE voltage.

Friday, May 31, 2024, 11:48 decreased TBHT to 280A, waiting to reestablish ANODE voltage. 

 Friday, May 31, 2024, 12:59 decreased TBHT to 275A, waiting to reestablish ANODE voltage.  

Friday, May 31, 2024, 12:09 decreased TBHT to 270A, waiting to reestablish ANODE voltage.  ---> recovered after 2 min at 270

Friday, May 31, 2024, 14:09 decreased TGHT TBHT to 0 for target removal monday.

Monday, June 03, 2024, 09:04 TP1A TP1B off. Waiting 30min for turbo pumps to slow, prior to venting to atmosphere.

 Monday, June 03, 2024, 10:07 venting. VV1 open. - target subsequently removed for testing possible shorting fix

Friday, June 14, 2024, 16:37:  Ceramic spacer placed between the anode and plasma electrode.

Target returned to test stand. Rough vacuum on.

Monday, June 17, 2024, 09:34:  TP1A on, TP1B on.

 Monday, June 17, 2024, 16:54  increasing tght tbht to 440 230 A at 1A/30s

 Tuesday, June 18, 2024, 14:14 Increasing ANODE to 100V .    Voltage holding.  Increasing TBHT to 290A, watching anode voltage for possible temperature induced short.

 Tuesday, June 18, 2024, 14:54   ANODE shorted at TBHT = 290A.   cooling TBHT to reestablish ANODE OL.

Tuesday, June 18, 2024, 15:04 ANODE OL reestablished at TBHT = 283A

Tuesday, June 18, 2024, 15:05  Increasing TBHT again. 1A/2min

Tuesday, June 18, 2024, 15:32 ANODE shorted again when TBHT reached 290A

Tuesday, June 18, 2024, 15:32   cooling tght tbht. ANODE OL reestablished at TBHT 275A

Tuesday, June 18, 2024, 15:42 reheating to 440A 290A with ANODE at zero, to see if there is a difference compared to heating with ANODE ON/OFF

 Tuesday, June 18, 2024, 15:55  confirmed shorted when hot. cooling to zero. 1A/30s

Tuesday, December 02, 2024, 15:35    - Target loaded into the test stand

Thursday, December 03, 2024, 14:33 - as per elog entry 1033, test stand has been changed to CATHODE mode, and wiring within the Faraday cage has been altered appropriately. Additionally, a GeMov resistor has been added to potentially reduce the sparking problems that have previously tripped the TGHT power supply

Thursday, December 04, 2024, 10:00    - Roughing pump having trouble reaching suitable vacuum - possible replacement required.

Thursday, December 05, 2024, 13:37  - Turbo pumps on

Wednesday, December 11, 2024, 15:02   dropped bias/ee/ezl to 0

Wednesday, December 11, 2024, 15:02    Must cool target to investigate Cathode short. Prior to installation, target isolation was confirmed. If the cathode dropped to contact the copper plate shielding the coil, this would be evidence to support keeping the retainer.

Thursday, December 12, 2024, 09:24   after cooling, cathode power supply was checked to see if shorted and it is indeed still shorted out.

 Thursday, December 12, 2024, 09:25   turning off turbo pumps to spin down 

Thursday, December 12, 2024, 11:30:     venting chamber  

 Friday December 13:   after venting the chamber and removing the target. The target appears to be unshorted and intact. However, upon inspection of the test stand, there appears to be a ~100Ω load between the cathode and ground. This load is able to sustain voltage from the cathode power supply, but draws a significant amount of current. It is too much for operation, and might be further aggravated by the presence of the target. Further, when the TGHT and TBHT terminals are shorted together, the resistance from cathode to ground drops to ~1Ω. Perhaps this could be associated with the installation of the TGHT power supply, as FEBIAD has not been run on this machine since it was installed.   Wiring at the feedthroughs as been quadruple checked, I don't believe that the problem lies there.

With no target in place, the cathode was able to hold a voltage, despite drawing 100+mA current. However, I was unable to repeat further tests, as the power supply stopped responding. Despite ramping up to ~10V in epics, the readback is 0V/0A, unlike before.

 Tuesday, January 07, 2025, 16:00 -  Target assembly installed in test stand. electrical connections assessed:

Prior to installation:  oven and cathode isolated from heatshield. no shorts

After installation:  Oven and Cathode 35kΩ from HVC. 

Tuesday, January 07, 2025, 16:05  -  pumping down to rough vacuum

Tuesday, January 07, 2025, 16:45  TP1B on.      TP1A on.  Pumping down

Prior to proceeding, ensure that ALL water cooling is turned on, as it was all drained and empty for the past 2 weeks.

Tuesday, January 07, 2025, 17:10   Beam line TP1 and TP2 on. 

Wednesday, January 08, 2025, 09:01    chamber pressure at 1.0E-6 T,  beamline pressure at 3.7E-7 T

 Wednesday, January 08, 2025, 10:32 - water cooling all on. no effect on vacuum pressure. 

Wednesday, January 08, 2025, 10:33    - Increased argon pressure in the gas line has no effect on vacuum pressure. it is registered on the pressure gauge at feedthrough.- 

  - However, roughing pump doesn't seem to be venting the argon gas line. I disconnected the copper line to the venting valve to confirm pump activity. - no activity detectable. 

- removed pump from assembly. switching on by itself shows no evidence of pump functionality. When on, pump is heating to very hot temperatures. I've emailed Edi at vacuum group to investigate further.

Wednesday, January 08, 2025, 15:02   - Vacuum group says that the pump is dead. We can replace it if we'd like, but i've created a temporary solution by connecting the argon venting valve to the backing pumps. For the sake of being careful (although this may be overly cautious), we must avoid opening this venting valve without first isolating the connection from the turbo pumps via closing TSG:PV1

Wednesday, January 08, 2025, 15:04  ramping up COIL to ensure conditioning against outgassing later.  vacuum appears to be stabilizing below 2e-6 T

Wednesday, January 08, 2025, 16:32   vacuum recovered, beginning to heat at 1A/30s up to 580A/230A    TGHT/TBHT

Wednesday, January 08, 2025, 22:32   with COIL on, the vacuum pressure increased to ~2.2E-6 T before beginning to recover, leaving on to encourage vacuum recovery.

Thursday, January 09, 2025, 08:27 Vacuum at 1.0E-6 T.  COIL off.

Thursday, January 09, 2025, 10:15   Argon gas line at 0.5 bar.a

Thursday, January 09, 2025, 10:56   increasing BIAS/EE/EZL  to 30/1.5/13 kV 

Thursday, January 09, 2025, 11:19    turning on optics elements. TMS:Q2 is timed out and possibly unalive. - must be investigated

Thursday, January 09, 2025, 12:38  HV at 30kV. monitoring for spark activity 

Thursday, January 09, 2025, 12:53  over 15 minutes, there was just one possible spark.  I see also that TPS:Q2 (quadrupole prior to FC0) seems to be half-down. i can't seem to get it to stop timing out and recharge. must investigate further

after investigating further and attempting to reset/reconfigure. I tried power cycling the canbus controller as well. In the end, controls group determined that this controller needed to be replaced.

 Thursday, January 09, 2025, 14:34   all optics set.  setting COIL CATHODE to 40A 120V.   CATHODE is leaking 0 current. (0.000 mA readback).  

Thursday, January 09, 2025, 14:37   reading 2.91e-8A at FC0 . found Argon peak at 40 exactly. MB1 current 96.4561 A

Thursday, January 09, 2025, 14:42 using COIL CATHODE scan program to optimize. (data file measure_id=9106)  A local maximum was identified at 140V with 40A coil current. However, a short seems to show up when the cathode voltage reaches ~130V. it lets through only ~10mA at 130 and then will release up to at least 100mA at 140V.

As time passes, the sustained voltage drops over time, given a current limit of 100mA. it dropped to ~50V. On subsequent increases of the power supply, current begins leaking through at ~65V. 

Given this, I will continue (while monitoring the cathode power supply) with a cathode coil of 50V 90A.

Thursday, January 09, 2025, 15:28  FC0 = 2.21 e-8 A.    FC6 at 3.21e-10A   RPM taken for all 4.

Thursday, January 09, 2025, 16:04   mass scan complete  -  2025_01_09-16_01 FEBIAD no retainer 1.txt CATHODE voltage was stable at 50V throughout.

 Thursday, January 09, 2025, 16:07  decreasing BIAS/EE/EZL to 0, 0, 0

 Friday, January 10, 2025, 09:09    ramping BIAS/EE/EZL  to 30/1.5/13 kV 

Friday, January 10, 2025, 11:51 Increasing COIL and CATHODE to 90A and 50V (was able to ramp cathode up to 100V before seeing current loss)

Friday, January 10, 2025, 11:53   FC0 = 1.7e-8 A.    FC6 = 4.9e-10 A    wire scans taken.

Friday, January 10, 2025, 12:00     Beginning mass scan with COIL CATHODE at 90A 50V   - 2025_01_10-12_28 FEBIAD no retainer 2.txt

Friday, January 10, 2025, 12:28   decreasing BIAS/EE/EZL to 0, 0, 0

 Friday, January 10, 2025, 13:15   gas inflow OFF (at rough vacuum pressure). Ramping up again BIAS/EE/EZL  to 30/1.5/13 kV 

Friday, January 10, 2025, 14:27   FC0 = 1.22e-8A.   FC6 = 2.93e-12A  (at 40) .   mass scan taken  = 2025_01_10-14_18 FEBIAD no retainer 3 argon off.txt     wire scans taken.

Friday, January 10, 2025, 14:28   TGHT TBHT cooling to 0A 0A at 1A/30s
 

Monday, January 13, 2025, 11:00   testing cathode isolation on cold target by ramping up cathode voltage until breakdown.   At 120V, CATHODE current is 2.4mA. (125V, 8.5mA), at 130V, current limiting and dropping voltage.

 Monday, January 13, 2025, 11:10   power supplies off. Winding down turbo pumps for chamber evac

Monday, January 13, 2025, 13:07   venting