Thursday, February 18, 2021, 15:01: With the help of Spencer Kiy, we tested the proper communication from python to epics.

Getting TSP:Q1 PV: successful both from the web application and jupyter notebook.

Setting TSP:Q1 PV: successful from the web application, failed jupyter notebook.

Issue fixed on the HLA server side

Setting TSP:Q1 PV: successful both from the web application and jupyter notebook.

Testing other potentially useful apps for ramping routines and a  customized "striptool".

HLA developments only available from the ISAC test stand's PC and Fernando's PC.

Thursday, February 18, 2021, 15:19: Gas lines roughed and refilled. Gauge reads -50 kPa. Absolute pressure is 50 kPa.

IG1 @ 9.7 e-7 T.

Thursday, February 18, 2021, 15:27: BIAS/EZL/EE @ 30/13/1.5 kV. No sign of instabilities as before. Bias current=0.08 mA.

This also means the leak, in this clean environment is fine.

Thursday, February 18, 2021, 15:28

Slightly drop in flow. Will check later as well.

Thursday, February 18, 2021, 15:37: BIAS/EZL/EE @ 35/13/1.5 kV.

Thursday, February 18, 2021, 15:39. Spark inside. Recover with no problem

Thursday, February 18, 2021, 16:27 : BIAS/EZL/EE @ 40/13/1.5 kV.

Thursday, February 18, 2021, 16:28: Spark

Thursday, February 18, 2021, 16:42:

 Thursday, February 18, 2021, 17:1: Logging water temperature and flow in the PC.

Thursday, February 18, 2021, 17:19: BIAS/EZL/EE @ 0.000 kV.

Thursday, February 18, 2021, 17:20: Auto-ramping TGHT/TBHT to

Thursday, February 18, 2021, 17:26: Anode is shorted. It seems that the  Ta capillary  is touching the HS. I have to open.

Thursday, February 18, 2021, 17:35: IG1 and turbos off.

 Thursday, February 18, 2021, 18:2: Venting

Thursday, February 18, 2021, 18:42: Gauge reader at the service cap is now at -40 kPa. A 10 kPa incursion over 4 hours.

Friday, February 19, 2021, 11:04: The anode still has a short, returning all previous jumpers. Short present.

Unhooked anode cable can sustain voltage, hence the electric circuit has a short,

Friday, February 19, 2021, 11:48: Target removed. No short on anode-target. However there is no short in the service tray either, the voltage from the anode supply is held with no problem.

Friday, February 19, 2021, 12:41: Only when the tbht is bolted the power supply goes current limited.

Friday, February 19, 2021, 12:44: Source tray can hold anode voltage without drawing any current, as expected.

Friday, February 19, 2021, 12:52: Target legs to HS presents a short. When HS is removed the short is gone. Will try to find the contact point.

Friday, February 19, 2021, 12:56: Suspecting that is the gas line that goes to the back of the TGHT; is too high and touches the HS. Putting and insulator and installing the HS cover. No short.

Removing the insulator there is a short.

Will bend the gas line.

Friday, February 19, 2021, 13:08: Installed the open assembly, and the anode voltage is held in the system without drawing current, as expected.

Friday, February 19, 2021, 13:21: TIS assy re-installed, short is fixed.

Friday, February 19, 2021, 13:28: Roughing

Friday, February 19, 2021, 13:43: Power on

Friday, February 19, 2021, 13:59: Turbos on

Friday, February 19, 2021, 14:07: IG1 on.

 Friday, February 19, 2021, 15:06:  Water open. No vacuum response.

Friday, February 19, 2021, 15:06: IG1 @ 3.13e-5 T.

Friday, February 19, 2021, 15:47 :

Friday, February 19, 2021, 15:48: IG1 @ 1.65 e-5 T

Saturday, February 20, 2021, 09:19. IG1 @ 1e-6 T

Saturday, February 20, 2021, 09:20: Auto-ramping TGHT/TBHT to 300,150 A @ 2A/min

Saturday, February 20, 2021, 13:26:  IG1 @ 1.78e-6 T

Saturday, February 20, 2021, 13:29: Anode @ 50 V. Coil @ 20 A. 

Saturday, February 20, 2021, 13:52: Bias voltage only reaches 6 kV, the bias current seems a bit unstable, not  sure now what the problem is.

Saturday, February 20, 2021, 14:58: Auto-cooling TGHT/TBHT to 0 A @ 2 A/min 

Sunday, February 21, 2021, 11:24: Auto-ramping TGHT/TBHT to 580/290A @ 2A/min  

Sunday, February 21, 2021, 16:39: Ramp up complete. IG1 @ 2.15e-6 T. 

Will wait until vacuum is stable to try  to put high voltage.

Sunday, February 21, 2021, 21:51: IG1 @ 2.06e-6 T.  Unable to go above 5 kV.  

Sunday, February 21, 2021, 22:00:  Auto-cooling TGHT/TBHT to 0 A @ 2 A/min 

Monday, February 22, 2021, 09:12: IG1@1.01e-7 T. Bias gets current limited as of 11 kV. The system does not spark so the current is leaking through somewhere.

Monday, February 22, 2021, 09:29: Grounding the TM2 F/T. No effects, same bias issues.

 Monday, February 22, 2021, 11:3: the only way for this instabilities to occur is with a short between ground and HV. No such touch is occurring inside.

Monday, February 22, 2021, 11:37: Instability reacts with punching the cage, that is, shaking up the cage causes the instability to decrease.

Will re-accommodate the cage as it seemed slightly crooked, hence the motivation to punch it.

Monday, February 22, 2021, 14:00: Cage re-accommodated with the help of Aaron. Move a insulating cable that was touching a FT.

Monday, February 22, 2021, 14:30: Now sparks are visible between the coil/HS waterlines and ground waterlines (see pictures attached). I have to open the vacuum chamber.

Monday, February 22, 2021, 14:54: IG1 off. Turbos off.

Monday, February 22, 2021, 15:49: Venting

Monday, February 22, 2021, 16:43: Made clearance between HS/COIL to GND.

Monday, February 22, 2021, 17:48 Roughing

Monday, February 22, 2021, 18:17: Turbos on.

Monday, February 22, 2021, 18:25: IG1 on.

Monday, February 22, 2021, 19:01: Gas lines refilled with |50 kPa| or argon. Gauge reads -40kPa.

Monday, February 22, 2021, 19:01: IG1@3.48e-5T

Monday, February 22, 2021, 19:01: Waterlines open

Monday, February 22, 2021, 19:06: IG1 @ 3.04e-5 T.

Tuesday, February 23, 2021, 08:34: IG1@1.56e-6T.

Tuesday, February 23, 2021, 08:43: BIAS/EZL/EE @ 30/13/1.5 kV, anode bias @ 200 V. No problems with the bias ramp up.  I will wait some time in here just to make sure it's OK, but it looks like the problem is solved now.  

Tuesday, February 23, 2021, 08:52:  BIAS/EZL/EE/AND @ 0.000 kV.

Tuesday, February 23, 2021, 08:55: Auto-ramp up TGHT/TBHT to 580/290 @ 4A/min 

Tuesday, February 23, 2021, 09:35:  Gauge reads -20kPa, that is, there was  a 20 kPa air incursion over 18 hours.

Tuesday, February 23, 2021, 9:36: Roughing and re-filling the gas lines. Gauge reads again -40 kPa 

 Tuesday, February 23, 2021, 11:30: BIAS/EZL/EE @ 30/13/1.5 kV, anode bias @ 200 V.

Tuesday, February 23, 2021, 11:31: IV4 open.

Tuesday, February 23, 2021, 11:47: Sparks when anode is @ 500 V. 

AS

Tuesday, February 23, 2021, 14:18: Mass & wire scans taken. Word doc attached.

FM

Tuesday, February 23, 2021, 22:17: All afternoon and evening running my code to get systematic measurements. They are still going but in summary:

For TGHT=580 A and TBHT=290 A, the temperature estimation is 1740 C, which is extremely cold for a FEBIAD. This explains why with this assembly I need to go around 310 to get something reasonable.

Tuesday, February 23, 2021, 22:52: Between 100 and 200 V the current always increases with coil current  > 50 A. The maximum increase factor is around 4. As the voltage increases the current stops increases at coil >50A.

 Tuesday, February 23, 2021, 23:59: Refilling gas lines.

TBHT to 310

Wednesday, February 24, 2021, 02:21: BIAS/EZL/EE/AND @ 0.000 kV:

Wednesday, February 24, 2021, 02:22: lowering tght/tbht to 520/250@ 4 A/min. 

Wednesday, February 24, 2021, 09:18: Opening cage to increase upstream pressure for the calibrated leak.. Will go to |100 kPa|

Wednesday, February 24, 2021, 09:26: No vacuum response.

Wednesday, February 24, 2021, 09:30: Cage locked.

Wednesday, February 24, 2021, 09:31: Auto-ramping TGHT/TBHT to 580/290 @ 4A/min

Wednesday, February 24, 2021, 09:42: BIAS/EZL/EE @ 30/13/1.5 kV, anode bias @ 200 V.

Wednesday, February 24, 2021, 11:23 :Opening cage to increase upstream pressure for the calibrated leak.. Will go to |250 kPa|

Wednesday, February 24, 2021, 11:31: Actually my two-stage regulator limits how much higher I can go. Limited to |200kPa| for and Ar leak rate of 4e-6 mbar l /s.

Wednesday, February 24, 2021, 11:33: Gas line refilled, no vacuum response.

Wednesday, February 24, 2021, 11:34: Cage locked.

Wednesday, February 24, 2021, 11:37 : BIAS/EZL/EE @ 30/13/1.5 kV, anode bias @ 200 V.

 Wednesday, February 24, 2021, 12:10: Mass scan completed.

Wednesday, February 24, 2021, 12:10: Auto-ramping TBHT to 310 A @ 2 A/min. This current should be around 1800-1850 C.

 Wednesday, February 24, 2021, 15:0: Temperature estimation says 1700 C, I wonder if the temperature is colde because of the high power target.

Wednesday, February 24, 2021, 15:02 : Argon signal is quite noticeable as roughing the gas lines drop the current down to 0 .

Wednesday, February 24, 2021, 18:55: Emittance scans have failed for both argon and m/q=28. It might be related to the very low intensity of the beam. FC0 reads ~10 nA at TBHT=310.

Change several parameters but only noise is recorded.

Wednesday, February 24, 2021, 18:57 Auto-ramping TBHT to 315 @ 1A/min

 Wednesday, February 24, 2021, 21:35: BIAS/EZL/EE/AND @ 0.000 kV:

Wednesday, February 24, 2021, 21:35: Cooling target @ 1 A/min

Thursday, February 25, 2021, 09:37: TGHT/TBHT @ 520,255 A IG1 @ 1.25e-6T. 

Thursday, February 25, 2021, 09:38: Auto-ramping TGHT/TBHT to 580/290 A @ 4 A/min 

Thursday, February 25, 2021, 09:46:  BIAS/EZL/EE @ 30/13/1.5 kV, anode bias @ 175 V.

Thursday, February 25, 2021, 14:04: Efficiency is decreasing as TBHT current increases. This seems to be correlated to the apparent reduction in estimated temperature coming from the anode current readback.

This could indicate that the increase in TBHT current heats up the TGHT-TBHT system but given this is a HP target, maybe the heat is dissipated through the target.

On previous tests both at the isac test stand and the evaporator 2, I have seen the effect of tght current in cathode temperature.

I will lower the TGHT current and I will keep increasing the TBHT current to see what happens.

Thursday, February 25, 2021, 22:46: Several attemps for efficiency measurements as a function of temperature. Partially sucessful

Thursday, February 25, 2021, 22:47: TGHT/TBTH @ 450/290.

 Thursday, February 25, 2021, 22:48: BIAS/EZL/EE/AND @ 0.000 kV:

Friday, February 26, 2021, 08:55: IG1 @ 1.07e-6 T.

Friday, February 26, 2021, 09:00:  BIAS/EZL/EE @ 30/13/1.5 kV, anode bias @ 175 V.

Friday, February 26, 2021, 17:20: All day running efficiency measurements as a function cathode input current.

With the colder target I estimated a maximum cathode temperature of 1820 coming from TBHT current=330 A.

Despite this being an estimated temperature from the anode drain current, the fact that the maximum total source beam current is only some tens of  nA, indicate very few electrons.

I finally managed tom take emittance measurements, so far the  parameters on the emittance rig page were not compatible with the tune I am using.

Friday, February 26, 2021, 19:26: Mass scan left running at this high temperature. 

MAss scan run at different coils

Friday, February 26, 2021, 23:18: Cooling TBHT to 290 @ 2 A/min.

 Friday, February 26, 2021, 23:19: BIAS/EZL/EE/AND @ 0.000 kV:

Saturday, February 27, 2021, 18:12: TBHT voltage stable, IG1 stable. Despite putting a lot of heat, the system seems to be OK.

Most of the day I have been setting up routines for automatic sweeps. 

they work fine

Sunday, February 28, 2021, 02:48: Experimental run will finish in about 1hr.

Code will set anode=5V and coil=0A.

Lot's of parameter mapping, efficiency measurements, some emittance scans, some rpms, some mass scans

Sunday, February 28, 2021, 23:12: Increasing voltage limit on the tbht heater from 3.001 to 3.5, just in case is necessary to reach 340 A. 

bunch of mass scans run.

Monday, March 01, 2021, 05:02: BIAS/EZL/EE/AND @ 0.000 kV:

Monday, March 01, 2021, 05:0: Auto-cooling TGH/TBHT to 0 A at 2 A/min 

AS

Monday, March 01, 2021, 09:00: Coil from 90 to 0 A. Power / sources off.

Monday, March 01, 2021, 09:02: IV4 closed / reset

Monday, March 01, 2021, 09:05: IG1 & Turbo pumps off.

Monday, March 01, 2021, 09:07: Purge FS#5

Monday, March 01, 2021, 10:44: Vented

 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. 

 Monday, March 01, 2021, 16:03: An ExTorr RGA has been installed in the ISAC test stand.

The original SRS 100 is still broken ( e-log 778)

The SRS 100 from the conditioning station will not be available this week.

Tuesday, March 02, 2021, 11:40: Fully reset

TGHT / TBHT set to 20 A ok. Anode w/ 30 V. ok.

Tuesday, March 02, 2021, 11:42: 10 A on coil. Increment was at 75 A. Set back to 1 A.

Tuesday, March 02, 2021, 11:44: BIAS / EE / EZL @ 1 / 0.5 / 1 kV.

Wednesday, March 10, 2021, 10:48  : Venting beamline section only for installation of emittance meters.

Swapped RP2 out from a Varian SH-110 to a Varian PTS06001.

Wednesday, March 10, 2021, 14:20: RP2 on.

Wednesday, March 10, 2021, 14:27: Turbo pumps on

Monday, March 15, 2021, 16:09 Target and ion source ramped to 400A/330A this afternoon

Monday, March 15, 2021, 18:53 : Tune through to final RPMs but not optimized. 5e-8 on FC0. Will turn down target and ion source values to TGHT/TBHT 350/250 until tomorrow. BIAS/EZL/COIL/ANODE all off.

Tuesday, March 16, 2021, 15:04  Mike is finished with emittance meter controls so ramping everything back up and trying to get beam through.

Thursday, March 18, 2021, 18:06 : Vacuum has been rising slowly over the past 20hrs from 9.3e-7 to 9.9e-7. Everything has been up since Tuesday. No beam through emittance meter, though beam can be found on the regular test stand emittance meter. Just discovered that both voltage plates are plugged into positive power supplies so waiting for a controls fix on that then will retry.

Friday, March 19, 2021, 17:08 : Finally success. New emittance meter shows same results as the standard test stand emittance rig. Will continue testing new controls next week

Lot's of water visually present in the chamber.

Wednesday, March 24, 2021, 13:17: Water lines purged.

Vent & wipe out the water inside the chamber. Setup a fan to aid in drying. Manually purge the water from the RP1 Scroll pump through the exhaust.

Thursday, March 25, 2021, 08:06: Gradually open each line to check the water blocks & fittings for a visual leak. Open the ballast plug on RP1, as well as manually purge the water from the RP1 Scroll pump through the exhaust again.

Thursday, March 25, 2021, 08:34: Leak found on FS#3 - Left Coil return (G) water block.

Thursday, March 25, 2021, 09:15: FEBIAD assembly & L-Coil line removed.

Thursday, March 25, 2021, 11:38: Re-connect RP1 to the exhaust port & re-insert the ballast plug.

Thursday, March 25, 2021, 11:40: RP1 Ok. CG1A & CG1 B around 0.048T & dropping. Chamber still open.

Indium gasket installed on G, C-Seal on E.

Friday, March 26, 2021, 08:21: Roughing.

Friday, March 26, 2021, 09:08: Vacuum @ 2.001 T. Opened FS#3 waterline. Quick test.

Friday, March 26, 2021, 09:11: Vacuum @ 1.901 T. No observable spike on CG1.

Friday, March 26, 2021, 09:12: Close FS#3 & purge

Friday, March 26, 2021, 09:27: Quickly open ballast plug.

Friday, March 26, 2021, 09:30: Re-insert plug.

Friday, March 26, 2021, 09:38: CG1 @ 2.253 T.

Friday, March 26, 2021, 09:41: Close BV1A & B.

Friday, March 26, 2021, 09:45: Manually purge water from the RP1 Scroll pump through the exhaust.

Friday, March 26, 2021, 09:51: Re-open BV1A & B.

Friday, March 26, 2021, 10:17: Close BV1A & B. Manually purge water from the RP1 Scroll pump through the exhaust.

Friday, March 26, 2021, 10:26: Close the exhaust & give the pump time to recover.

Friday, March 26, 2021, 10:36: Briefly vent the chamber to 30 T. Re-open BV1A & B.

Friday, March 26, 2021, 11:20: Vacuum @ 1.706T. Open FS#3. Allow to fill with water, then close off. No observable spike on CG1.

Friday, March 26, 2021, 11:25: Opened ballast cap. Close BV1A & B.

Friday, March 26, 2021, 11:26: Close ballast.

Friday, March 26, 2021, 11:29: Briefly vent the chamber to 30 T. Re-open BV1A & B.

Friday, March 26, 2021, 12:11: Vacuum @ 2.75T. Close BV1A & B. Vent chamber to setup a fan.

Monday, March 29, 2021, 09:00: LD & He attached. LD#2 as supplied via Vacuum group.

Monday, March 29, 2021, 09:01: Sniffer set. Leak Rate @ 2.0E-07 to 2.3E-07 atm-cc/sec

Monday, March 29, 2021, 09:03: Pressurize (E)(G) to 75 PSI.

Monday, March 29, 2021, 09:05: No major spike seen on LD.

Monday, March 29, 2021, 09:06: Pressurize (E)(G) to 100 PSI.

Monday, March 29, 2021, 09:09: No major spike seen on LD. Purge He from the lines.

Monday, March 29, 2021, 09:12: Roughing.

Monday, March 29, 2021, 09:22: Opened ballast cap to release water vapour while roughing.

Monday, March 29, 2021, 09:42: Closed the ballast cap. Purge cycle RP1 on & off for the next hour or so.

To purge cycle RP1 for water vapour. Close BV1A & B. Disconnect exhaust line from RP1 & open the upper ballast. Close PV1, Vent with TSG:VV1A till the line reaches atmosphere with dry nitrogen.

Close VV1 & open PV1. Water should spew out of the exhaust. Rough the backing lines down. Open BV1A & B to rough then chamber. Repeat leaving the upper ballast open.

Monday, March 29, 2021, 14:00: Purge RP1. Close upper ballast, re-connect exhaust.

Monday, March 29, 2021, 14:36: TP1B on.

Monday, March 29, 2021, 19:47: TP1A on. 

Monday, March 29, 2021, 19:55: IG1 on. 

Tuesday, March 30, 2021, 08:52: Vacuum @ 4.48e-06T.

LD to TP1B base @ 1.4E-08 to 1.9E-08 atm-cc/sec.

Tuesday, March 30, 2021, 08:58: He @ 55 PSI

Tuesday, March 30, 2021, 09:04: LD to TP1B base @ 2.4E-08 atm-cc/sec.

Tuesday, March 30, 2021, 09:12: Reconnect FS#3 to DI.

Tuesday, March 30, 2021, 09:14: Opened FS#3 w/ DI

Tuesday, March 30, 2021, 09:20: Vacuum @ 4.40e-06T.

Tuesday, March 30, 2021, 09:33: FS#2, 4, & 5 open. Vacuum ok @ 4.40e-06T

Tuesday, March 30, 2021, 09:34: Power/sources on.

Tuesday, March 30, 2021, 09:37: Auto-ramping TGHT / TBHT to 200 / 100 A @ 2 A per min.

Tuesday, March 30, 2021, 12:12: Auto-ramping TGHT / TBHT to 350 / 125 A @ 2 A per min. 

Tuesday, March 30, 2021, 13:50: Vacuum @ 4.66e-06T. Auto-ramping TGHT / TBHT to 450 / 150 A @ 2 A per min.

Tuesday, March 30, 2021, 21:59: Vacuum @ 5.01e-06T. TGHT / TBHT @ 393 / 150 A. Reset Auto-ramping TGHT / TBHT to 550 / 200 A @ 2 A per min.

Wednesday, March 31, 2021, 11:46: IV4 opened. Optics & HV power switched on.

Wednesday, March 31, 2021, 11:52: HV check ok. Optics reset. BIAS / EE / EZL @ 1 / 0.1 / 1 kV. Coil @ 4 A. Anode @ 100 V

Wednesday, March 31, 2021, 11:54: Optics remain on. HV & coil back to 0. Ready to run once the Vacuum returns to a reasonable level. Vacuum @ 5.45e-06T.

Wednesday, March 31, 2021, 15:05: Auto-ramping TGHT / TBHT to 580 / 270 A @ 2 A per min.

Vented beamline and removed ARIEL emittance meter. In the process of swapping components, beamline left vented until Monday when we will finish the job.

Emittance meter number 2 ready for beam shortly - installed and pumping down.

No beam found by Thursday evening, but beam seems to be coming out much differently than last time. Will check on emittance meter functionality and try to re-tune later.

Ramping things down for the next couple days.

Saturday, April 03, 2021, 10:41 :

Source heating ramped back up, everything back on. Will try to straighten out steering then see if I can get things back in the previous positions.

Saturday, April 03, 2021, 14:59 :

Nothing seems to be working, will vent the beamline and remove the slit.

Saturday, April 03, 2021, 15:36 :

Apparently closing the valve started a vacuum leak that tripped everything in the source. I noticed within the first minute and ramped everything back up, maybe too quickly....

Have now put everything in a holding state, will resume tomorrow.

Sunday, April 04, 2021, 14:17 :

Found everything off again this morning. Ramping back up in the hopes that I can get something done before the whole system trips again. The trips look like water leaks again.

Uninstalled the slit and left it in the bottom of the vacuum box. Swapped the window to the computer side for convenience. Seal on the other side on the CF flange is a bit weird, not sure if it is in properly...

Sunday, April 04, 2021, 18:43

Still no beam. TISA emittance FC won't come back on, so waiting for Mike Rowe to troubleshoot on Tuesday. Will ramp things down all the way, since I expect the vacuum to trip the source before I need it again.

Tuesday, April 06, 2021, 23:43

Found some beam, but looks really weird, like it is cut off. Good enough. Ramped everything down.

IG1 has been spiking randomly, causing everything to turn off. Looks like the water leak is still there.

AS - Multiple purges done on RP1 & the backing lines. Some water noted. FS#3 is closed.

Tuesday, April 06, 2021, 09:39: TP1B on.

Tuesday, April 06, 2021, 10:01: TP1A on.

Tuesday, April 06, 2021, 10:12: IG1 on. Vacuum @ 1.97e-05T.

Tuesday, April 06, 2021, 11:00: FS#2, #4, & #5 open. Vacuum @ 5.73e-06T.

Tuesday, April 06, 2021, 11:12: Vacuum @ 5.09e-06T. Open FS#3.

Tuesday, April 06, 2021, 11:17: IG1 @ 4.64e-06T. Open IV4. Reset optics & sources.

Tuesday, April 06, 2021, 11:20: Optics on.

Test were run

Thursday, April 08, 2021, 10:30: Power / sources off.

Thursday, April 08, 2021, 10:34: IG1 & turbo pumps off.

Changed the gaskets from C-seals on FS#3 water blocks E, F,& H. G was already done.

Tuesday, April 13, 2021, 13:23: FS#3 Waterline opened.

Tuesday, April 13, 2021, 13:25: No immediate water noticed visually or on the gloves.

Tuesday, April 13, 2021, 13:31: Visual leak present on (F). Purge the line.

Change the gasket.

Tuesday, April 13, 2021, 14:42: FS#3 Waterline opened.

Tuesday, April 13, 2021, 14:55: No water leak noticed visually or on the gloves.

Tuesday, April 13, 2021, 14:58: Roughing. Will leak check under vacuum tomorrow morning.

Tuesday, April 13, 2021, 16:01: TP1B on. 

Tuesday, April 13, 2021, 20:53: TP1A on. 

Tuesday, April 13, 2021, 20:58: IG1 on. 

 Wednesday, April 14, 2021, 10:18

Work started to bring the ATTS PS inside the ITS HV cage. HV grounding rod and metal sheet around breaker panel were removed - see picture.

 Friday, April 16, 2021, Afternoon

HS line purged and turbos shut down.

Monday, April 19

Morning, Anders vented ITS

11AM, Dan found o-ring and indium seal on the same connector - likely this was the cause of the leak. replaced by a brand new indium seal, punched with the RH punchers, which seems the way to go.

Evening, Luca disinstalls FEBIAD from Fernando, and installs the P2N target. It has not been leak checked in the cold lab prior to installation (I'm not sure where all the equipment is), and no resistance measurements were carried out since I couldn't find Travis's ohm-meter.

Vacuum coming down, but slowly than I expected (took 1h to get from 2e-5 to 1e-5 T, is this right?)

Tuesday, April 20, 2021, 15:33

This morning Ray installed the controls cables connecting the ATTS PSs. They are still attached to the ATTS PLC, but their interlock signal now comes from the TBHT "enable" , through a 15V signal. Once the power is ON, he recommends checking that the TBHT sends the proper 15V (has to be higher than 12V) to the ATTS PLC, checking the voltage between the red and green/while cables on the PLC module labelled "TGHT:MAS". This should be done once the TBHT is "enabled", so the signal is sent.

The DC cables were installed going from the positive and negative poles of the ATTS:SLV. The order and number of 4/0 cables are:

Positive: One cable to G and two cables to E

Negative: One cable to H amd two cables to F

This should be checked with Arthur once he's on site (tomorrow).

A water leak was still seen, while the pressure was around 1E-6 T. Checking all three loops of FS#3, it's confirmed again that the leak is in HF. Will need top open up and pinpoint the leak.  

Thursday, April 22, 2021, 13:45

The lines F and G were inspected for water leaks. After blanking them to inspect the solder joint along the lines, two new indium seals were repositioned, the lines sniffed and no signs of leaks were detected. TS closed up again, pumping down now.

 Friday, April 23, 2021, 21:06

Pressure in ITS slowly coming down. This morning was ~3E-6T and now is 2E-6T. Water was flowing for most of the day, but I turned it off and purged FS#3 with no significant difference. I re-turned it on in order to run short PS tests with little current (up to ~10 A) for few seconds every time. Now I purged FS#3 again to leave the TS pumping over the weekend with air, so that opening the water in few hours/days might give us a better idea if the leak is still there.

As far as power supplies, we ran lots of tests today with Ray and Arthur (both were remotely connected through Teams). Initially the tests were unsuccesful because I kept turning off the main breaker when testing the electronics, and only later realized the ITS-PLC is connected to the same breaker.

After this realization, we progressed step by step: we confirmed that the enable signal (~13 V) was seen by both the ITS-TBHT and the ATTS-MASTER, however we realized that the ATTS:MASTER was *not* turning OFF when it should have. This is because the shutoff voltage signal was not zero, but was around ~1V, and was enough to turn OFF the TBHT (Xantrex) but not the ATTS:MASTER (TDK). Arthur suggested this could be due to the fact that two PLC are tied to each other, and see different "grounds", hence some voltage confusion might be coming from here. After taking a look at the connections in the ATTS PLC, we decided to try isolating the ATTS:MASTER module from its ground connection by disconnecting the yellow and green wires coming from the top of its PLC module, and this resolved the issue when the DB25 connector of the ATTS"MASTER is disconnected from the PS; however, once this DB25 is connected, the voltage seen by the MASTER is still ~1V and not zero, and still enables the PS when it should instead be shutoff. 

Next week we should try to find the proper wire configuration that allows seeing zero V as shutdown signal and not ~1V.   

Tuesday, April 27, 2021, 20:56

The new P2NHT power supply configuration is now operational at the test stand. A relay was added in the PLC cabinet to take a +15V signal from the TBHT PLC module and close a short circuit to "enable" the P2NHT master and slave (TDK-LAMBDA).

After initial ramping up to ~222A, I noticed the voltage read by the PS was about 0.45V, while extrapolating the results from the previous ITS-P2N run, the voltage should have been ~0.9V. I would like to measure the resistances of the lines to pick up potential shorts in the copper conductors in the vacuum chamber.  

Wednesday, April 28, 2021, 11:30 

This morning, the resistance matrix was measured between the feedthroughs of the test stand, see attached picture.   

TBHT+ = A

TBHT- = B

P2NM- = C

P2NM+ = D

P2NS+ = G,E

P2NS- = F,H

Talking to Carla, we agree that the matrix seems correct and does not show any signs of short in the lines. But still, the voltages read by the PS seem too low compared to the previous run on July 2020.

Wednesday, April 28, 2021, 19:14

To make sure that current is not flowing where it is not supposed to be, the ion source only (A, B) was hooked up  to the TBHT

Voltages: 

A/C (TBHT+ / P2NM-)=-0.11 V

A/D (TBHT+ / P2NM+)=-0.11 V

B/C (TBHT- / P2NM-)=0.21 V

A/B (TBHT+ / TBHT-) = 0.33 V

While the PS reads 0.42 V --> The two lines made up by two welding cables each make up for the remaining 0.09 V

There's no current flowing anywhere else, all other feedthrough have V=0 between each other.

Wednesday, April 28, 2021, 20:01

Welding cables attached so that the P2NM and P2NS only (TGHT and COIL) are delivering current to the target.  

At 230A of the P2N heater (130 on the master, 102 on the slave), the sum of all current coming and going to the feedthroughs balances out. 

The voltages across feedthroughs make sense:

B/C (TBHT+ / P2NM-)= 0.20 V

B/D (TBHT+ / P2NM+)=0.22 V

A/B (TBHT+ / TBHT-) = 0.0 V

C/D (P2NM- / P2NM+) = 0.44 V

E/C (P2NS+/P2NM-) = 0.46V

The current going from I (HV common) to H (P2NS-) is zero (0.3A)

After checking these values, I see no reasons to believe the wiring is incorrect, and will proceed with the full installation of P2N heater and TBHT, and ramping up the whole system together. It was noticed though that the TBHT cannot be ramped automatically since the ITS TGHT is not connected to the PLC, and needs to be ramped by hand.

Determined on Friday April 16th that the water leak was on the coil negative circuit. This was determined by circulating water through once circuit at the time. Only HF and GE tested (not Extraction Electrode).

 Wednesday, April 28, 2021, 22:30

First P2N heating test ongoing.

At P2NHT ~ 570 A and TBHT ~ 100 A shine is already seen, which suggests that current is flowing in the P2N target properly, see picture attached.

Most of the ramping is carefully monitored because the good vacuum signal from the TTS ramping procedure is obviously not working (bypassed), and if the pressure goes past 1E-5T the whole ITS should interlock and abruptly drop the currents, which we want to avoid.

Wednesday, April 28, 2021, 23:16

P2NHT set current = 810 A

P2NHT read current = 800 A

Master and slave have balanced fully, TBHT ramping still proceeds manually. I'm trying to get it to ~200A before leaving.

 Thursday, April 29, 2021, 00:54

Ramping successfully achieved.

P2NHT_Master = 594 A - 4.59 V

P2NHT_Slave = 611 A - 4.89 V

P2NHT = 1207 A

TBHT = 231 A - 2.29 V

Max temperature of welding cables = 40 deg

Zero current from the HV ground terminal (feedthrough I) to slave negative (feedthrough H)

Parasitic assemblies on the lid & end plate included. Online HS.

Wednesday, May 19, 2021, 16:00: Roughing.

Thursday, May 20, 2021, 08:42: Turbo pumps were turned on last night. Vacuum @ 9.99e-07T.

Thursday, May 20, 2021, 08:44: FS#5 open. Vacuum ok.

Thursday, May 20, 2021, 08:45: Power / sources on.

Thursday, May 20, 2021, 09:34: Turbos OFF

Thursday, May 20, 2021, 10:37: Venting.

Thursday, May 20, 2021, 11:28: P2N legs no longer touching. Roughing.

Thursday, May 20, 2021, 12:05: Turbo pump TP1B on.

Thursday, May 20, 2021, 12:10: Turbo pump TP1A on.

LE:

Thursday, May 20, 2021, 15:00: Ramping stared at high warming rate. 10 or 5 A every 15 seconds

Friday, May 21, 2021, 01:31: Around midnight, the P2NHT current was very noisy for few hours, and then it dropped to zero. Turbos are now stopped to open up and investigate.

Friday, May 21, 2021, 05:45 P2N assembly removed, water lines closed and purged - one leg is fully broken

FBP:

HV tests Monday 24/05/2021 and Tuesday 25/05/2021

HS was ramped up to 30KV on monday, only 1 spark seen over night. BIAS/EZL/EE : 30KV/14KV/-1.5

Ramping to max HV on Tuesday.

40KV

AS:

Tuesday, May 25, 2021, 11:5: HV tapped down to 0 kV on BIAS / EE / EZL.

Wednesday, May 26, 2021, 07:23: Power / sources off. IG1 off. Turbo pumps off.

Wednesday, May 26, 2021, 09:04: Venting. Waterlines purged.

LE:

Wednesday, May 26, 2021, 10:37 Target removed from test stand and brought to cold lab

Monday, June 07, 2021, 14:39: Roughing beam line section.

Monday, June 07, 2021, 14:46: TMS:TP6 on.

Monday, June 07, 2021, 14:49: TMS:TP2 on.

Wednesday, June 09, 2021, 10:00: FC6 wiring reconnected.