Shutting down the ISAC TS for the planned outage on Dec 22.

Monday, December 21, 2020, 07:50: Ion gauges & turbo pumps off.

Monday, December 21, 2020, 07:51: Confirm wire scanner shutoff.

Monday, December 21, 2020, 07:55: Waterlines purged.

Monday, December 21, 2020, 07:57: Backing valves TMS:BV6 & TMS:BV2 off. PV1 & PV2 off. Roughing pumps off.

Restarting TS after holidays & planned power outage.

Monday, January 04, 2021, 08:17: All epics controls in a 'white out' state.

Monday, January 04, 2021, 08:20: Rebooted PLC / IOC. Controls returned.

Monday, January 04, 2021, 08:22: Strip tools started / epics response ok.

Monday, January 04, 2021, 08:23: Switch on TMS:RP2 & TSG:RP1

Monday, January 04, 2021, 08:24: Open PV1 & PV2.

Monday, January 04, 2021, 08:26: Optics, steering, and archivers still in a non-responsive / 'white-out' state.

IOC rebooted on January 6. Controls returned to normal.

I have rewired the test stand (service cap wiring only, not power supply wiring) to anode bias mode as shown in the diagram. This was not how it was wired before, there are several things I have removed that appear to be newer additions. I also removed the burned cable between TBHT(-) and COIL(-), and between the multipin feedthrough and ground (probably related to the other burned cable).

I tried to measure the resistances across the feedthroughs (as opposed to across the resistors themselves) but they all seem wrong. I get 27Ohms across the TGHT and TBHT circuits instead of 100Ohms. Between the TGHT and TBHT I get 100Ohms as expected. Across the coil circuit I get 6Ohms instead of 100Ohms. Probably only the 6Ohms really needs to be fixed, but if the resistors are damaged, then the varistors might be as well.

Fernando Maldonado wrote:

Yesterday, December 1st, I successfully installed and tested the gas system inside the faraday cage. The changes performed were as follows: Remove He gas tank (to make room for new tank) Remove calibrated leak to connect new gas line Remove convectron gauge to install a high range dial manometer.   The tests were done manually and consisted as follows: Gas lines roughed by opening SV1. Tank regulator set to deliver 1 bar SV4 opened to allow the gas to enter the lines Dial manometer verified to  match the pressure set by the regulator Alternatively roughed and pressurized the lines by opening/closing SV1/SV4 Tank lines emptied with SV1 and SV4 open simultaneously.   The test involve the lines up to SV5. The gas line portion from SV5 to the top of the HV cage was not included as it was removed for TM3 HV tests (se entry #822) When the HV tests are concluded I will install a new line that will include a gauge.

 Yesterday, January 13th I added back the gas line from SV5 to the service cap.

I temporarily added a gauge in between to measure the gas pressure. After successful tests I removed it from this location.

Finally, I added the gauge on the service cap, which its desired location (see attached picture). The tests corroborate no pressure losses from the gas bottle up to this location.

Fernando Maldonado wrote:

Wednesday, October 30, 2019, 14:49: John C. changed the polarity of the anode power supply to negative, and Fernando M. rewired the cabling on the service cap.

 Wednesday, January 20, 2021, 11:26: John Chow verified that the power supply was in negative mode.

Just as side note, I think the PS was in negative mode since the quoted entry from October 30 2019. Given that the SiC/FEBIAD was supposed to run in cathode mode, the test stand was rewired to this. The only rewiring after this was for the P2N.

 Thursday, January 21, 2021, 10:05: Anodeless Negative Bias On Surface Ion  Source, or ANBOSIS (still working on the acronym). installed to test energy spread vs position.

The SIS allow a more forgiving operation while calibrating such that other sources can have these type of measurements.

 Thursday, January 21, 2021, 10:43: Electrical connection make sense inside the source tray both with and without TIS. Anode confirmed to be on HV common through 9-pin.

Thursday, January 21, 2021, 10:46: Roughing.

Thursday, January 21, 2021, 11:17: Turbos on. 

Thursday, January 21, 2021, 11:25: IG1 on. 

 Thursday, January 21, 2021, 12:52: IG1@2.67e-5 T

AS

Friday, January 22, 2021, 07:04: Vacuum @ 4.57e-06T.

Friday, January 22, 2021, 07:07: FS#2 open. Vacuum ok @ 4.57e-06T

Friday, January 22, 2021, 07:13: FS#3 Open. Vacuum ok @ 4.57e-06T

Friday, January 22, 2021, 07:24: FS#4 Open. Vacuum ok @ 4.48e-06T

Friday, January 22, 2021, 07:30: FS#5 Open. Vacuum ok @ 4.48e-06T

Friday, January 22, 2021, 07:39: Reboot IOC (Optics page has a white out)

Friday, January 22, 2021, 07:44: Power / Sources on.

Friday, January 22, 2021, 07:49: Reboot PLC / IOC again. Surface source page ok. Optics page still in white out.

Friday, January 22, 2021, 07:52: Controls to TGHT / TBHT non-responsive. 10 / 5 A on TGHT / TBHT @ 0 / 0 A on epics & the PS.

Friday, January 22, 2021, 08:15: Tested HV. OK on both EZL & BIAS w/ 500 V each, then back to 0 V. TGHT / TBHT still not responding.

AS

Friday, January 29, 2021, 09:52: TS checks ok. Fixed. TGHT /  TBHT @ 10 A each. BIAS / EE / EZL @ 500 / -200 / 300 V to check.

 https://elog.triumf.ca/TIS/Test-Stand/842

Friday, January 29, 2021, 09:53: Auto-ramping TGHT / TBHT to 350 / 150 A @ 2 A per min.

Friday, January 29, 2021, 10:05: BIAS / EE / EZL @ 30 /-1.5/13 kV.

Friday, January 29, 2021, 10:08: Lot's of sparking*** Reduce BIAS / EE / EZL to 20 / -1.5 / 10 kV.

 FM

Friday, January 29, 2021, 11:24: BIAS / EE / EZL @ 29 /-1.5/13 kV.. No Sparks. Ramping up to 30 kV in steps of 100V.

Friday, January 29, 2021, 11:28: Reached 30kV on bias. No sparks after 2 minutes. Previously, the sparks happened within seconds after reaching 30 kV, according to the striptool.

Friday, January 29, 2021, 11:41: There were  five inaudible sparks. They are likely occurring inside as the target-ion source is being heated. Small rise in vacuum occurred and then the spark started.

Friday, January 29, 2021, 11:42: BIAS / EE / EZL to 0.000 kV to allow outgassing

Friday, January 29, 2021, 12:44  Auto-ramping TGHT / TBHT to 500 / 200 A @ 4 A per min.

Friday, January 29, 2021, 13:32: TGHT/TBHT @500/200 A.

Friday, January 29, 2021, 13:44. Spark on top.

Friday, January 29, 2021, 13:48 : BIAS / EE / EZL @ 30 /-1.5/13 kV.

Friday, January 29, 2021, 13:49: Anode gets current limited even at 1 V.  Could this indicate a short, or that the anode is floating?

Friday, January 29, 2021, 13:53: Spark across extraction electrode spark gap.

Friday, January 29, 2021, 14:13: Auto-ramping TBHT to 225 A @ 3 A per min.

Friday, January 29, 2021, 14:32: 10 min ago, the IG6 timed out. Nothing tripped but the epics couldn't restarted. Manually turned Fil1 on controller but didn't work. Fil2 did the trick. Back to normal.

Friday, January 29, 2021, 14:42: Spark gap again. It turned the separator section yellow (except MB1)"

Friday, January 29, 2021, 15:08: Auto-ramping TGHT to 580 A @ 2 A per min. Good vac level set to 3.5e-7T

Friday, January 29, 2021, 15:17: Inaudible spark. First spark after 25 min.

Friday, January 29, 2021, 15:30: Playing with TBHT current. Couple of sparks when playing with the steerers and einzel lens. TGHT auto-ramp waiting for good vacuum.

Friday, January 29, 2021, 16:25: Vacuum reached bad vaccum level. Currentes were step back. No sparks for around 40 minutes.

Friday, January 29, 2021, 16:41: System seems to be dirty. It will likely take the weekend to reach nominal vacuum levels.

I will reduce the HV and keep the heaters on. I will keep an eye during the weekend.

Friday, January 29, 2021, 16:44: 50 minutes without sparks

Friday, January 29, 2021, 16:46:  BIAS / EE / EZL to 0.000 kV to allow outgassing during the weekend.

Saturday, January 30, 2021, 11:59: Vacuum has steadily decrease over time allowing the auto ramp-up routine to make progress.

Saturday, January 30, 2021, 12:00 IG1 @ 3.58e-6T . TGHT/TBHT @  566/230 A. All voltage still at 0 V.

Saturday, January 30, 2021, 12:56: TGHT/TBHT @ 580/230 A. 

Sunday, January 31, 2021, 09:32: TGHT/TBHT @ 580/230 A. IG1@2.59e-6T. 

Sunday, January 31, 2021, 10:48:  BIAS / EE / EZL @ 30 /-1.5/13 kV. No sparks on the way up. Beam is now noticeable on the wire scanners, When I first tried with colder target current no beam.

Sunday, January 31, 2021, 13:31: After around 3 hours, only two sparks have occurred.

Sunday, January 31, 2021, 13:54: Spark. All of them seem to be going to EZL. 

Sunday, January 31, 2021, 15:13: Spark. Separators optics turned yellow. 

Sunday, January 31, 2021, 15:38: Spark. 

Sunday, January 31, 2021, 16:11: Things were looking good so i  decided t o try  a mass scan , however a series of sparks started. I set all biases to 0 and stop the tests for today.

On Tuesday the hard good vacuum level was changed from 7e-6 T to 1e-5 T to allow larger leak rates when testing FEBIAD.

Also this new level should allow faster heating rates (be mindful and cautious)

Work done as per WP C2021-01-19-9

Friday, January 29, 2021, 09:11: CANBUS controller was replaced. Quick systems check ok. Sources, HV, & Optics all good.

Friday, January 29, 2021, 10:05: HV & Ramping check.

Friday, January 29, 2021, 10:08:

Monday, February 01, 2021, 08:38 : The anode seems to be shorted but we can still test the  amount of dispersion at the image position, and correlate with energy spread.

Monday, February 01, 2021, 11:27: Bias/EZL/EE @ 30/0/1.5 kV. 

 Monday, February 01, 2021, 11:44: Mass scan in progress. The peaks appear to be shifted. Large peak at  m/q160 and double peak at m/q 100u, where I think it should be 133Cs and 85Rb and 87Rb.

Monday, February 01, 2021, 14:04: HV turned itself off, nothing tripped nor change. Not sure if related to the emittance scan that I was running. Setting it to zero before restarting it.

Monday, February 01, 2021, 20:14: Ramping things down and call it a day. My laptop charger broke and I don't want to leave the HV on.

Wire scanners look fine but the emittance meter was not working. Keiko soft reboot it but to luck. 

AS

Tuesday, February 02, 2021, 08:51: E-rig re-calibrated. Mass scans taken. It appears we have evaporated all the salts. Turning off the HV & auto-cooling @ 3A per min.

Tuesday, February 02, 2021, 12:18: IV4 closed, power/sources off. Turbo pumps off.

Tuesday, February 02, 2021, 12:50: Venting.

Remove, add salts, EE ok.

Tuesday, February 02, 2021, 13:58: Rouging.

Tuesday, February 02, 2021, 14:26: Turbo pump on - TP1B.

Tuesday, February 02, 2021, 14:37: Turbo pump on - TP1A. Ion gauge on.

AS

Wednesday, February 03, 2021, 07:36: Vacuum ok @ 1.01e-06 T.

Wednesday, February 03, 2021, 07:38: Opened FS#5. Vacuum ok.

Wednesday, February 03, 2021, 07:41; Power / Sources on. Optics on.

Wednesday, February 03, 2021, 07:43: Auto-ramping TGHT / TBHT to 350 / 150 A @ 4 A per min.

Wednesday, February 03, 2021, 07:46: IV4 open

Wednesday, February 03, 2021, 07:48: BIAS / EE / EZL @ 20 / -1.0 / 0 kV to start. will go to 30 & 1.5 kV once the TGHT reaches 350 A.

Wednesday, February 03, 2021, 09:40: Auto-ramping TGHT / TBHT to 580 / 230 A @ 2 A per min.

Wednesday, February 03, 2021, 10:55: BIAS / EE / EZL @ 30 / -1.5 / 0 kV. Lot's of sparks on the initial conditioning from 8:30am until almost 10:20. Appears stable now.

 FM

Wednesday, February 03, 2021, 13:01: Spark. The HV bias voltage remained at 10 kV for several seconds. TSG:CBC was @ 2500 V. Likely, a sustained discharge towards the steerer had the HV bias power supply to get current limited

 Wednesday, February 03, 2021, 13:25: HV bias power supply gets current limited as of 15 kV. Setpoints to 0 to allow some discharge. Didn't work. Asking someone on site to have a look on the PS.

No sign whatsoever of a spark  to any device.

Wednesday, February 03, 2021, 18:27: HV has been erratic all day. Waiting for some stabilization allowed the system to reach ~24 kV. Now it has dropped to 20 kV.

Wednesday, February 03, 2021, 18:28: Increasing current limit on the bias PS from 0.015 to 0.02 mA

Wednesday, February 03, 2021, 18:55: Spark in the water lines. Current drop 60% from 0.03 to 0.01 uA. Spark observed in the GND electrode water lines

Wednesday, February 03, 2021, 19:11: Able to reach 28 kV but a spark ocurred.  TSG:CBC adn TSG:Q1 readback 2500 and 1500 V (similarly to the spark at 1 pm). Bias is current limited again, even at the new current limit.

• I think there might a short with one of the steerers cables, or a bit unlikely, to the quad.
• Slow charge up process, that does not discharges.

Wednesday, February 03, 2021, 19:32: Bias/EZL/EE @ 0.000 kV

Wednesday, February 03, 2021, 22:59: Tapped down TGHT/TBHT to 500/200 A to preserve the salts.

AS

Thursday, February 04, 2021, 06:42: Auto-cooling TGHT / TBHT down to 300 / 150 A. 

Thursday, February 04, 2021, 09:14: Optics set to standard settings. Checking BIAS w/ EE & EZL 

Thursday, February 04, 2021, 09:21: BIAS / EE / EZL to 16.5 / -1.0 / 10 kV. Actual on BIAS 14.5 to 15 kV on BIAS:RDVOL & w/ 0.029 mA on BIAS:RDCUR.

Thursday, February 04, 2021, 09:24: BIAS discharge. 16.5 kV on BIAS:RDVOL & w/ 0.004 mA on BIAS:RDCUR.

Thursday, February 04, 2021, 09:32: Brought BIAS up to 19 kV, but then it sparks and dropped to 13.5 kV on BIAS:RDVOL & w/ 0.029 mA on BIAS:RDCUR. Brought the BIAS down to 13 kV, & the current dropped out, then stabilized. Brought it back up to 16.5 kV. Holding 16.5 kV on BIAS:RDVOL & w/ 0.004 mA on BIAS:RDCUR.

Thursday, February 04, 2021, 09:36: BIAS / EE / EZL to 16.5 / -1.0 / 10 kV

Thursday, February 04, 2021, 09:39: Auto-cooling TGHT / TBHT down to 0 A. 

Thursday, February 04, 2021, 09:40: 17 kV - BIAS:RDVOL / 0.005 mA - BIAS:RDCUR.

Thursday, February 04, 2021, 09:45: 17.5 kV - BIAS:RDVOL / 0.005 mA - BIAS:RDCUR.

Thursday, February 04, 2021, 09:51: 18 kV - BIAS:RDVOL / 0.005 mA - BIAS:RDCUR.

Thursday, February 04, 2021, 09:55: 18.5 kV - BIAS:RDVOL / 0.005 mA - BIAS:RDCUR.

Thursday, February 04, 2021, 10:00: 19 kV - BIAS:RDVOL / 0.005 mA - BIAS:RDCUR.

Thursday, February 04, 2021, 10:14: 19.5 kV - BIAS:RDVOL / 0.005 mA - BIAS:RDCUR. 

Thursday, February 04, 2021, 10:20: 20 kV - BIAS:RDVOL / 0.005 mA - BIAS:RDCUR.  

FM

Thursday, February 04, 2021, 12:54:  20.5 kV / 0.006 mA 

Thursday, February 04, 2021, 12:58: 21 kV / 0.005 mA

Thursday, February 04, 2021, 13:02: 21.5kV / 0.006 mA 

Thursday, February 04, 2021, 13:08: 22 kV / 0.005 mA. 

Thursday, February 04, 2021, 13:12: 22.5 kV / 0.006 mA. 

Thursday, February 04, 2021, 13:58: 30 kV / 0.008 mA.

Thursday, February 04, 2021, 14:04: Spark. Bias is current limited.

Thursday, February 04, 2021, 14:39 : Small bright spot at the TGHT or HS cooling lines from the solder of the GND water lines.

Without voltage this is not noticeable. Likely a corona discharge happening at this location and hence limiting the current.

Opening to create clearance. Also to troubleshot the cathode power supply.

Thursday, February 04, 2021, 16:07: Turbos off.

The system was vented to  make clearance on the waterlines as a very small continuous discharge was observed.

The inspection revealed some marks on the HS water line (sideview photo). From the the bottom and from real close (zoom and backview photo) the marks are quite noticeable with shinny copper in the middle and dark circles around.

The GND line is routed in such a way that sits on top of the ion gauge chamber (gnd-ig1) this could explain why the vacuum had small oscillation during the current limited events.

Moreover, the GND line has the steerer cables tied to it, this could explain why one of the steerers got affected after the sparks.

Also, the GND line is in contact with a dark grime that goes all the way into the first skimmer (gnd-quad). I think the grime observed inside the test stand might have become conductive, or if this is trace from a previous flashover, this  is good path to flash again.

The EE and the plasma electrode were removed and they show signs of buildup. Cleaned and reinstalled

See e-log entry: 884:

Thursday, February 04, 2021, 18:45: Roughing

Thursday, February 04, 2021, 19:13: Turbos on.

Thursday, February 04, 2021, 19:22: IG1 on.

AS

Friday, February 05, 2021, 06:20: Waterline FS#5 open. Vacuum ok @ 1.71e-06T.

Friday, February 05, 2021, 06:23:

Friday, February 05, 2021, 06:26: Tried to put 100 - 1000 V on the BIAS. Goes to 0.0 kV - BIAS:RDVOL / 0.029 mA - BIAS:RDCUR, straight to current limit. BIAS is shorted.

Friday, February 05, 2021, 06:32: Power / Sources / Optics off. Ion gauge & Turbo pumps off.

Friday, February 05, 2021, 07:28: Venting.

Friday, February 05, 2021, 08:37: Roughing. Target was re-salted. GE line was close/light touch to (B) line. Adjusted. Waterlines open on FS#5.

Friday, February 05, 2021, 09:06; Turbo pump TP1B on.

Friday, February 05, 2021, 09:14: Turbo pump TP1A on

Friday, February 05, 2021, 09:19: TP1A tripped. Wait on backing pressure.

Friday, February 05, 2021, 09:35: Vacuum Bypass on BV1A to turn on TP1A.

Friday, February 05, 2021, 09:39: TP1A at speed. Ion gauge on. Bypass removed.

Friday, February 05, 2021, 09:55: IG1 off. Bypass used on IG1. EE on, BIAS on.

Friday, February 05, 2021, 09:56: 500 - 1000 V - BIAS:RDVOL / 0.000 mA - BIAS:RDCUR. Ok.

Friday, February 05, 2021, 09:58: BIAS & EE off. Bypass removed. IG1 back on. Initial check ok. Vacuum to go below 1.0e-05T.

Friday, February 05, 2021, 11:37: Power / Sources / Optics on & set. Vacuum @ 6.46e-06T.

Friday, February 05, 2021, 11:42: BIAS / EE / EZL @ 10 / -1.0 / 7.5 kV

Friday, February 05, 2021, 11:50: BIAS / EE / EZL @ 20 / -1.5 / 13 kV. TGHT / TBHT @ 10 / 10 A.

Friday, February 05, 2021, 11:58: BIAS / EE / EZL @ 25 / -1.5 / 13 kV. TGHT / TBHT @ 10 / 10 A. Anode checked up to 100 V & down again. Ok.

Friday, February 05, 2021, 12:06: BIAS / EE / EZL @ 30 / -1.5 / 13 kV. TGHT / TBHT @ 10 / 10 A.

Friday, February 05, 2021, 12:14: BIAS / EE / EZL @ 35 / -1.5 / 13.5 kV. TGHT / TBHT @ 10 / 10 A.

Friday, February 05, 2021, 12:24: It charged up and began sparking continuously around 12:23.

Friday, February 05, 2021, 12:33: BIAS / EE / EZL @ 15 / -1.0 / 10 kV. TGHT / TBHT @ 10 / 10 A. The sparks were both clearly audible & visible on the spark gap up top (Image to be included in word doc)

FM

Friday, February 05, 2021, 14:16:   BIAS / EE / EZL @ 30/ -1.5 / 13 kV.  Anode @ 50 V.

Friday, February 05, 2021, 14:18: Auto ramp-up TGHT/TBHT to 580/230 A @ 4A/min

Friday, February 05, 2021, 15:08: Anode shorted, I think the  tube heater is touching the plasma electrode. TGHT/TBHT @ 209/209 A. TBHT voltage= 2.2. At the same time the bias current jump from 0.008 to 0.01.

Friday, February 05, 2021, 15:12: Reducing the TBHT to 190 A 2 V. Bias current linearly reducing with tbht current. The cathode is not current limited anymore. Wondering if the TBHT power supply is causing an electrical backflow or if the ion source is touching the plasma electrode.

Friday, February 05, 2021, 15:16: Auto ramp-up TGHT/TBHT to 580/230 A @  2 A/min

Friday, February 05, 2021, 15:21: The same effect as before at TBHT=223 A. When reducing to 190 A, anode goes up. 

Friday, February 05, 2021, 15:30:  Auto ramp-up TGHT to 580 A @ 4A/min and TBHT to 230 @ 1 A/min. 

Friday, February 05, 2021, 15:55: Sparks, not audible nor visible. I think I saw one on the top part of the water blocks. Lowering bias to 10 kV.

Friday, February 05, 2021, 15:56 : Auto-ramp range to 4A/min on both TGHT and TBHT

Friday, February 05, 2021, 19:23:  almost 2.5 hours without sparks. RPM tests performed. Voltages to zero. Will rise later or tomorrow remotely.

Taped down to 180/500 A on TBHT/TGHT. All voltages to  BIAS / EE / EZL @ 0.000 kV.

Saturday, February 06, 2021, 11:14:   Auto ramp-up TGHT/TBHT to 580/230 A @ 4A/min

Saturday, February 06, 2021, 12:16:    BIAS / EE / EZL @ 30/ 1.5 / 0kV.  

Saturday, February 06, 2021, 12:30: The previous tune is not working anymore. I have to re-tune . EZL now helps to have a better tune, no need for extreme steering

Well well well, after several scans I observed the following:

• Bias readback changes by 14  V. This doesn't necessarily means this is the absolute value, it could be better or worse.
• Magnet oscillates around 1 gauss, enough to move the beam to the sides.
• Different settings on the rpm scans does not yield to different results in the data
• Intensity variations causes one of the rpms scans to be lower or higher.
• Total source scans are always mirrored as long as nothing else varies.
• Separated ion scans varied wildly. No two consecutive scans are the same. Likely a combination of Bias voltage and magnet current ripples.
• Following Baartman's proceedure on a cherry-picked data set, I estimated an energy spread of 11.75 eV. To be discussed with him

Saturday, February 06, 2021, 20:00 Biases to 0.000 kV

Saturday, February 06, 2021, 20:00 : Auto-cooling TGHT/TBHT  to  400/150 A @ 3 A/min

 Saturday, February 06, 2021, 21:02: On the way down, TBHT 150  A and when TGHT cross 480 A the anode came back to life. Wonder if this could help diagnose deflection on the surface ion source (might be helpful for the P2N)

Sunday, February 07, 2021, 08:26:  Auto ramp-up TGHT/TBHT to 560/210 A @ 2A/min

Sunday, February 07, 2021, 09:18: Anode got current limited again when TGHT/TBHT @ 446/200 A 

Sunday, February 07, 2021, 11:26:  Auto ramp-up TGHT/TBHT to 560/210 A @ 2A/min 

 Sunday, February 07, 2021, 11:31: Once again, the latest tune did not work. I suspect the ion source deformation varied from thermal cycle to thermal cycle. With a crooked beam, the EZL will send the beam off-center and the quad will not compensate that. The double peak observed in the beam size scan indicates that the focusing is not correct.

Sunday, February 07, 2021, 18:41: With Baartman RPM scans, the x axis in in cm, as verified with an emittance scan.

New parameters on the emittance rig for this tune. Offset from 40 to -50. This shifts the phase space in the y axis such that is visible on the plot. 

Even in a different mass, the position scans on the dispersion plan are not reproducible.

Sunday, February 07, 2021, 18:52: Auto-cooling TGHT/TBHT to 400/150 A  @ 6A/min / 3 A/min, respectively.

 Sunday, February 07, 2021, 18:53: Biases to 0.000 kV

I think the fast cool-down rate prevented the TBHTto be able to sustained voltage.

Sunday, February 07, 2021, 19:35: Auto-cooling TGHT/TBHT to 0 A @ 3A/min 

TBHT able to sustain voltage once TBHT=191 A and TGHT=372 A

Monday, February 08, 2021, 07:14: IV4 close

Monday, February 08, 2021, 07:15: IG1 off. Turbos off. 

Re-salted. PE removed. EE Cleaned

Monday, February 08, 2021, 09:17: Roughing.

Monday, February 08, 2021, 09:46: TP1B on

Monday, February 08, 2021, 11:45: Vacuum @ 6.70e-06T. Open waterlines

Monday, February 08, 2021, 11:49: Vacuum spike. Turn off IG1 & turbo pumps. Will vent to swap gaskets.

Monday, February 08, 2021, 12:45: Venting.

Swap & tighten.

Monday, February 08, 2021, 13:33: Roughing

Monday, February 08, 2021, 14:01: TP1B on.

Monday, February 08, 2021, 14:18: TP1A on.

Monday, February 08, 2021, 14:22: Opened waterline. Vacuum was in the e-05T range and dropping however it slowed and a spike was noted on CG1A & CG1B. Turbo pumps off to vent. Will inspect the seal face.

Monday, February 08, 2021, 15:08: Venting.

Monday, February 08, 2021, 15:57: Swapped out gaskets. Checked gasket faces & Re-installed HS. Roughing.

Monday, February 08, 2021, 16:44: TP1B on.

Monday, February 08, 2021, 16:51: TP1A on.

Monday, February 08, 2021, 16:58: IG1 on

Monday, February 08, 2021, 17:00: Opened waterlines. Backing pressure ok, Vacuum continuing to improve@ 7.90e-05T.

Monday, February 08, 2021, 17:03: Power/sources on. vacuum @ 5.19e-05T

FM

Tuesday, February 09, 2021, 00:46: IG1 @ 2.14e-6T. Auto-ramping to 580/230 @ 2A/min

Tuesday, February 09, 2021, 07:17. Anode got current limited again when TBHT/TGHGT were @ 215/215 A. 

AS

Tuesday, February 09, 2021, 08:32: BIAS / EE / EZL @ 20 / -1.5 / 10 kV

Tuesday, February 09, 2021, 09:02: BIAS / EE / EZL @ 30 / -2.0 / 13 kV

Tuesday, February 09, 2021, 09:16: BIAS remains @ 30 kV. Adjusting Optics, EE, & EZL to tune. Minimal beam on FC0 noted.

Tuesday, February 09, 2021, 10:02: HV off. Check Anode & down stream.

Tuesday, February 09, 2021, 10:36: Auto-cooling @ 4 A per min

Tuesday, February 09, 2021, 10:40: Aborted. TGHT / TBHT back to 580 / 230 A. A few more checks.

Tuesday, February 09, 2021, 10:58: Auto-cooling @ 4 A per min

Tuesday, February 09, 2021, 11:08: HV off.

Tuesday, February 09, 2021, 13:41: Power / sources off. FS#5 closed off. Turbo pumps off.

 FM.

After inspecting the ion source, and revising the electrical connections, I suspect that the TBHT was floating all the time and only when it was in contact with the plasma electrode it held HV.

When the plasma electrode was removed, there was no reference whatsoever, and the ions were not extracted.

It seems then that the resistor R4 (ISK4562D) is necessary to provide a reference to the TBHT  in a similar way R1 provides one to extraction electrode.

Tuesday, February 09, 2021, 20:52: Installing R4. If the anode works this time, it will be worth checking why this reference is necessary. From the electric diagram, the chassis ground should be HV ground.

Tuesday, February 09, 2021, 13:43: DI water flow completely stopped.

Control room contacted. DI water loss confirmed.

Tuesday, February 09, 2021, 13:52: DI water flow returned.

Control room contacted. DI water loss due to a "seamless" pump change over for the DI water supply & mechanical services. The supply was transferred over to a new pump which overloaded and failed. They had to switch back over to the (old) pump. Mechanical services will still try to do the switch over again. Either tomorrow or the day after. Running the TS up to 580A until then is not recommended.  Control room to update tomorrow morning.

Fault# 13773: Cu-LCW south SA3-03 tripped on motor overload.

Note* target has a ring on the TGHT - Right leg. EE & PE placed. Target to HS OL - OK.

Wednesday, February 10, 2021, 09:37: Roughing.

Wednesday, February 10, 2021, 09:45: Bypass / Force applied on IG1 to test Anode.

Wednesday, February 10, 2021, 09:46: Anode @ 10 V. Ok.

Wednesday, February 10, 2021, 09:47: Anode @ 200 V. Ok. No current.

Wednesday, February 10, 2021, 09:48: Anode to 0V & off. Bypass / Force removed from IG1.

Wednesday, February 10, 2021, 10:06: TP1B on.

Wednesday, February 10, 2021, 10:46: TP1A on.

Wednesday, February 10, 2021, 13:42: Vacuum @ 9.08e-06T. open FS#5

Wednesday, February 10, 2021, 13:46: Vacuum increased to 9.70e-06T as well as the backing pressure increased. Turbo pumps off. Going to swap the assembly out completely however continue with the same LP-SIS oven.

Wednesday, February 10, 2021, 15:20: HS 44378-3 Installed w/ LP-SIS oven #44691-8. Roughing

Wednesday, February 10, 2021, 15:48: TP1B on. 

Wednesday, February 10, 2021, 16:02: TP1A on.

Wednesday, February 10, 2021, 16:11: Bypass / Force applied on IG1 to test Anode. Anode @ 200 V. Ok. No current.

Wednesday, February 10, 2021, 16:13: Anode to 0V & off. Bypass / Force removed from IG1. EZL & EE check ok. IG1 on for real.

Wednesday, February 10, 2021, 16:14: Vacuum @ 6.12e-05T & Dropping.

Wednesday, February 10, 2021, 16:16: FS#5 open. Both IG1 & the backing lines are pumping down quickly.

Contacted MCR. Reminder, mechanical services still intends to service the DI water pump. Constant DI water flow is not guaranteed.

https://elog.triumf.ca/TIS/Test-Stand/847

Thursday, February 11, 2021, 00:13: : Anode to 10V. Auto-ramping TGHT/TBHT to 200/100 A @ 2 A/min

 Thursday, February 11, 2021, 09:03: Auto-ramping TGHT/TBHT to 400/200 A @ 2 A/min

From: Jas Uppal <juppal@triumf.ca>Sent: February 11, 2021 9:12 AM
To: Fernando Maldonado Millan <maldonado@triumf.ca>
Subject: Re: Cu-LCW water lines status for the ISAC test stand

Hi Fernando,

  There are no plans for Cu-LCW system to be switched off today.  I believe they are still working on correcting the issue that caused the trip two days ago.  Once it is corrected and we are ready to switch to the secondary pump, the switch over "should" be relatively invisible with possibly a slight drop in line pressure.

Jas Uppal 

 Thursday, February 11, 2021, 10:31: TGHT/TBHT at 400/200 A. Anode still at 10 V 

Thursday, February 11, 2021, 10:33: Auto-ramping TGHT/TBHT to 580/230 A @ 2 A/min

Thursday, February 11, 2021, 10:42: BIAS/EZL/EE @ 30/13/1.5 kV. 

Thursday, February 11, 2021, 13:42: Uncapable of holding HV. Maybe the new heatshield needs more time to outgas.

Thursday, February 11, 2021, 13:44: BIAS/EZL/EE @ 0.000 kV

Friday, February 12, 2021, 10:07: In order to trouble shoot the ISAC TS, I  let the sparks to continue. Initially, they occurred in the extraction electrode spark gap and were both visible and audible. However, they stop and the instabilitiy was present.

I rise the voltage again and let the spark happen for a longer period of time.

I saw how the collimator wire on the far back of the source tray was moving as if a hurricane was inside, which is very strange. I followed up the wire and I saw how it was sparking to something (see attached photo)

I say something because from the angle is difficult to say if it was going to the chamber itself or to the HS waterlines. Both scenarios are concerning

First of all the collimator is never biased and it if any case the jacket  (MHV cable) is on ground ground

In case the discharge happened from wire to the chamber, then the collimator wire was charging up, it is extremely important o note that the jacketed cable goes outside the box very close to one of the turbos.

In the other scenario where the discharge was happening from the wire to the HS waterlines, that is, HV to ground, the simply creating a clearance should be enough. In this case as well is relevant to know that this jackted cable leaves the farday cage.

I will create clearance from collimator wire to HS waterlines.

Friday, February 12, 2021, 10:33: BIAS/EZL/EE @ 0.000 kV

Friday, February 12, 2021, 10:35: Auto-cooling TGHT/TBHT to 0 A @ 4A/min.

Friday, February 12, 2021, 11:05: Discharge confirmed visually to go into the HS waterlines, (HV to ground) (see second photo attached)

Friday, February 12, 2021, 11:06: Inside the blue rack,  I could hear ticks that match the discharges, probably  the collimator PS is there. Will check later with things  off.

 Friday, February 12, 2021, 13:17: Turbos off.

 Friday, February 12, 2021, 14:36: Venting.

 Friday, February 12, 2021, 12:13: Since the collimator is not used, Carla and I installed a BNC short outside the cage. See picture.

Friday, February 12, 2021, 16:37: FEBIAD installed with mechanical calibrated leak

Friday, February 12, 2021, 16:38: Roughing.

Gas lines opened all the way to the sour. SV4 and SV5.

Friday, February 12, 2021, 18:47: Turbos on.

Friday, February 12, 2021, 18:55: IG1 on.

Friday, February 12, 2021, 23:22: IG1 @ 1.5E-4 T.  I think the line inside the vacuum chamber is leaking

Friday, February 12, 2021, 23:23: SV5 closed.

Friday, February 12, 2021, 23:24: Vacuum dropping slightly.

Friday, February 12, 2021, 23:24: SV5 opened. IG1 responds to the opening of SV5. The lines from the feedthrough to the calibrated leak need to be re-done.

Tuesday, February 16, 2021, 10:21: IG1 off. Turbos off.

Tuesday, February 16, 2021, 11:21: Venting.

Aaron closed SV4 and the vacuum drop normally. Leak through SV5 as well.

Vacuum side

Tuesday, February 16, 2021, 13:42: The gas lines inside have been check. The inlet of the calibrated leak was not tighten properly and hence the large leak observed.  FIXED.

Tuesday, February 16, 2021, 13:42: The only leak remaining INSIDE the vacuum is the one on the FT side which for 200kPa is around 7e-6 atm cc /s. At this pressure, the undesired leak  is leak rate is around 1 %  of the one getting into the source.

Atmosphere side

Tuesday, February 16, 2021, 14:49: Some minor leaks in connection points around  1e-6 atm cc/s. Not much I can do without changing all connection to glands with metal gaskets.

Tuesday, February 16, 2021, 14:50: SV5 was leak check on its own, the gas goes through quite noticeable, no need to sniff with leak detector. SV1 leak checked and it works.

Tuesday, February 16, 2021, 14:52: Valves swapped, labels changed.

Tuesday, February 16, 2021, 15:17: Roughing.

Tuesday, February 16, 2021, 15:53: Turbos on.

Tuesday, February 16, 2021, 15:59: IG1 on

Tuesday, February 16, 2021, 16:29: IG1 @ 5.3e-5 and dropping. Already better than Friday/Saturday.

Tuesday, February 16, 2021, 16:53: IG1 @ 2.9e-5 T.

Wednesday, February 17, 2021, 16:53: IG1 @ 1.5e-6 T.

Wednesday, February 17, 2021, 16:53:  The Neon bottle seems to be empty. The leak on the lines were not as bad to have this happened. I suspect when squeezing the bottle I rotated the gauge enough to cause a leak there.

Wednesday, February 17, 2021, 17:00: Using a full nitrogen bottle, I confirmed that rotating the two-stage regulator causes a leak.

Wednesday, February 17, 2021, 18:00: Things look OK now. Water open. No response on vacuum. Will put power.

Wednesday, February 17, 2021, 20:00: Some items were timed out. Tried to recycle the PLC now all the items are red. Check tomorrow

Thursday, February 18, 2021, 10:45: TPS:Q3 & the TSB CBC CANBUS controllers had failed yesterday, as well as a cable was incorrectly seated. This was fixed this morning.

Before

After.

https://elog.triumf.ca/TIS/Test-Stand/847

There was a previous DI CU-LCW  pump trip as per the above elog. The CU-LCW pump was configured this morning. The water pressure is set to 80 PSI as per the MCR. Any further can overload & trip the pump. 

Thursday, February 18, 2021, 10:55: Current flow rates & pressure read at the TS

DI water pressure as per the gauge on the supply side of the FS#2-5 manifold @ 85 PSI.

Noticeable flow rate reduction based on previous target conditioning logs. Previous pressure was around 100 PSI.

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.