Was for UC# 32* - Schedule change, now for C#1* - Last HS conditioning revealed a TGHT to HS lid short. Milled the lid back 1/8" - Aaron S.

Friday, February 07, 2020, 14:00: Roughing.

Friday, February 07, 2020, 14:33: Turbo pumps on.

Friday, February 07, 2020, 14:38: IG1 on.

Monday, February 10, 2020, 07:39: HS waterlines opened. Vacuum ok @ 4.12e-07T.

Monday, February 10, 2020, 07:41: Power / sources on.

Monday, February 10, 2020, 07:43: Auto-ramping TGHT / TBHT to 580 / 230 A @ 2 A per min.

Monday, February 10, 2020, 13:01: Heating appears ok. No voltage abnormalities or short.

Monday, February 10, 2020, 13:02: Auto-Cooling @ 1 A per min.

Tuesday, February 11, 2020, 06:39: Power / Sources off.

Tuesday, February 11, 2020, 06:40: Waterlines purged. Nitrogen bottle @ 2100 PSI approx.

Tuesday, February 11, 2020, 06:42: IG1 off. Turbo pumps off.

Tuesday, February 11, 2020, 09:59: Venting.

Out Gas & MB1 check (Or leak check 2.0)

Ref: https://elog.triumf.ca/TIS/Test-Stand/809 - Leak Checks

Ref: https://elog.triumf.ca/TIS/Test-Stand/803 - Fault

WP I2020-08-19-1 For MB1 work

Thursday, September 03, 2020, 11:23: Vacuum remains stable @ 1.03e-06T.. PS on. Auto-ramp TGHT / TBHT to 350 / 150 A @ 2 A per min.

Thursday, September 03, 2020, 13:06: TS Tripped. Vacuum Spikes again. Appears the water leak is still ongoing.

Thursday, September 03, 2020, 13:49 Waterlines are all close. Vacuum becoming more stable.

Tuesday, September 08, 2020, 07:40: Ion Gauge & turbo pumps off.

Wednesday, September 09, 2020, 06:13: Venting.  

FS#2 - R TGHT (C) feed through and section had been removed and re-souldered both on the water block and the feed through.

Tuesday, September 15, 2020, 09:47:  Roughing.

Tuesday, September 15, 2020, 10:47: TP1B on.

Tuesday, September 15, 2020, 14:35 :TP1A on.

Tuesday, September 15, 2020, 14:42 : IG1 on.

Wednesday, September 16, 2020, 07:44: Vacuum @ 6.00e-06T.

Wednesday, September 16, 2020, 07:47: FS#2 waterline opened. Vacuum stable @ 6.00e-06T.

Wednesday, September 16, 2020, 08:02: Vacuum @ 5.97e-06T. Vacuum stable.

Wednesday, September 16, 2020, 08:03: FS#3 open. Vacuum stable.

Wednesday, September 16, 2020, 08:09: FS#4 open. Vacuum stable.

Wednesday, September 16, 2020, 08:24: FS#5 open. Vacuum stable @ 5.91e-06T.

No vacuum spikes noted.

Wednesday, September 16, 2020, 08:42: PS on. Note: Once Vacuum reaches 3.5e-06T, begin auto-ramping.

Wednesday, September 16, 2020, 09:25: It appears the leak is still here. But very subtle. Vacuum @ 6.18e-06T. Many curse words uttered. PS off. Locked out. Purge waterlines.

Thursday, September 17, 2020, 08:21: Vacuum @ 3.32e-06T.

Thursday, September 17, 2020, 08:23: Opened FS#5.

Thursday, September 17, 2020, 08:55: Opened FS#4. Vacuum @ 3.12e-06T.

Thursday, September 17, 2020, 09:51: Opened FS#3. Vacuum @ 3.12e-06T

Thursday, September 17, 2020, 10:21: Opened FS#2 Vacuum @ 3.12e-06T.

Thursday, September 17, 2020, 10:52: Gradual climb on IG1. Vacuum @ 4.44e-06T.

Thursday, September 17, 2020, 10:53: IG1 & turbo pumps off. Purge water from FS#2.

Thursday, September 17, 2020, 11:37: Venting.

Checked: Upper line & Lower line independently. No obvious leak detected. Checked O-rings. Replaced w/ C-Seals.

Thursday, September 17, 2020, 13:31: Roughing.

Thursday, September 17, 2020, 14:06: TP1B on. 

Thursday, September 17, 2020, 19:11: TP1A on. 

Friday, September 18, 2020, 12:07: FS#2 opened. Vacuum @ 2.48e-06T 

Friday, September 18, 2020, 12:12: FS#2 Closed. Vacuum spiked to near 6.0e-05T. 

Friday, September 18, 2020, 12:15: FS#2 fully purged. 

Tuesday, September 22, 2020, 06:51: Ion gauge & Turbo pumps off. 

Tuesday, September 22, 2020, 08:10: Venting.

O-rings swapped for fresh new ones w/ vacuum grease on (C) & (D) water blocks.

Tuesday, September 22, 2020, 09:27: Roughing.

Tuesday, September 22, 2020, 10:10: TP1B on. 

Tuesday, September 22, 2020, 12:20: TP1A on. 

Tuesday, September 22, 2020, 15:02: Vacuum @ 2.97e-06T.

Tuesday, September 22, 2020, 15:05: Opened FS#2. No immediate response.

Tuesday, September 22, 2020, 15:13: Gradual vacuum spike to 2.6e-06T. Closed FS#2

Wednesday, September 23, 2020, 06:36: Ion gauge & turbo pumps off. 

Wednesday, September 23, 2020, 11:38: TP1B on only. IG1 on.

Wednesday, September 23, 2020, 15:37: LD:  0.0e-09 atm-cc/sec. Vacuum @3.9e-06T.

Wednesday, September 23, 2020, 15:38: Open valve to TP1B.

Wednesday, September 23, 2020, 15:41:

LD: 0.0e-09 atm-cc/sec. Vacuum @3.67e-06T.

Wednesday, September 23, 2020, 15:51: LD: 0.0e-09 atm-cc/sec. Vacuum @3.67e-06T. No response on LD.

Wednesday, September 23, 2020, 15:57: 70 PSI of He on line (C) TGHT Right side. LD: 0.0e-09 atm-cc/sec. Vacuum @3.73e-06T. Flush line

Wednesday, September 23, 2020, 15:59: LD: 1.7e-09 atm-cc/sec. & Rising.

Wednesday, September 23, 2020, 16:00: LD: 4.1e-09 atm-cc/sec & rising. Line (C) confirmed again.

Wednesday, September 23, 2020, 16:04: LD & He disconnected. IG1 & TP1B off. Remove (C) Right TGHT line in the morning. Will aim to replace the source tray side. Feed through side has already been done.

Thursday, September 24, 2020, 07:16: Venting. 

Remove FEBIAD & Source tray side R-TGHT line (C) from FS#2. Blank off with blind double block.

Thursday, September 24, 2020, 08:41: Roughing

Thursday, September 24, 2020, 09:12: TP1B on.

Thursday, September 24, 2020, 09:18: Ion gauge on.

Thursday, September 24, 2020, 10:17: TP1A on. 

Thursday, September 24, 2020, 14:20: Connect LD & Set-up He. Vacuum @ 2.92e-06T. LD: 0.0e-09 atm-cc/sec.

Thursday, September 24, 2020, 14:22: Open valve to TP1B.

Thursday, September 24, 2020, 14:24: Vacuum @ 2.95e-06T. LD: 2.2e-08 atm-cc/sec. 70 PSI of He on line (C) TGHT Return side.

Thursday, September 24, 2020, 14:30: Vacuum @ 2.74e-06T. LD: 1.5e-08 atm-cc/sec.

Minimal change.

 Tuesday, September 29, 2020, 04:50: IG1 off. Turbo pumps off.

 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.

 Wednesday, May 01, 2024, 12:44:  pumped down to rough vacuum, TP1B now on.

Wednesday, May 01, 2024, 12:49:  TP1A on.

Thursday, May 02, 2024, 9:10:  water cooling on. no effect on vacuum

Thursday, May 02, 2024, 10:02:  TGHT and TBHT heating to 100A/100A at 1A/30s

Thursday, May 02, 2024, 11:02:  TGHT and TBHT heating to 230A/230A at 1.4A/10s

 Thursday, May 02, 2024, 13:53:  increasing BIAS to 30kV, EE to 2500V, EZL to 13kV

 Thursday, May 02, 2024, 14:11:  increasing  TGHT  to 280A.

 Thursday, May 02, 2024, 14:18  seeing a few sparks decreasing BIAS temporarily

Thursday, May 02, 2024, 14:25 sparks continued. decreased TGHT to 260A and saw them subside. increasing bias again.

 Thursday, May 02, 2024, 14:42 conducting mass scan - 2024-05-02-15-05 mm LPSIS a.txt

 Thursday, May 02, 2024, 15:09   increased COIL to 20A. mass scan repeated.  2024-05-02-15-37 mm LPSIS b.txt

Thursday, May 02, 2024, 15:38 decreasing TGHT to 230A, COIL at 0A

Thursday, May 02, 2024, 15:43:   repeating mass scan. 2024-05-02-16-09 mm LPSIS c.txt   * no signal. very unexpected.

Thursday, May 02, 2024, 16:10:  increased COIL to 20A, repeating mass scan.  2024-05-02-16-35 mm LPSIS d.txt

Thursday, May 02, 2024, 16:35   decreasing BIAS, EE, EZL to 0V

Thursday, May 02, 2024, 16:50 increasing TGHT to 290A at 1A/30s, to be left hot overnight.

 Friday, May 03, 2024, 10:26 increasing BIAS to 30kV, EE to 2500V, EZL to 13kV

 Friday, May 03, 2024, 11:47 increasing COIL to  40A. repeating mass scan     -   2024-05-03-12-21 mm LPSIS g.txt

 Friday, May 03, 2024, 12:22  decreasing TGHT to 260A.    

 Friday, May 03, 2024, 12:32 mass scan:   - 2024-05-03-12-59 mm LPSIS g.txt     <- accidentally labeled g. cannot change

Friday, May 03, 2024, 13:01   decreased COIL to 20A.   mass scan:  2024-05-03-13-30 mm LPSIS i.txt

Friday, May 03, 2024, 13:31  decreased COIL to 0A. mass scan:   2024-05-03-13-59 mm LPSIS j.txt

 Friday, May 03, 2024, 14:01  reducing TGHT to 230A.  mass scan:  2024-05-03-14-37 mm LPSIS k.txt

Friday, May 03, 2024, 14:38   increasing coil to 20A.    mass scan:   2024-05-03-15-14 mm LPSIS l.txt

Friday, May 03, 2024, 15:15   increasing coil to 40A. mass scan:     2024-05-03-15-42 mm LPSIS m.txt

Friday, May 03, 2024, 15:43  COIL -> 0A. decreasing EE EZL BIAS to 0V.

Friday, May 03, 2024, 15:59   decreasing TGHT and TBHT to 0A at 1A/30s

Salts added: 

Cs - 15 uL

Li - 10 uL

Na - 10 uL

Rb - 10 uL

K - 5 uL

Empty target in use. Mirror installed inside to look at the target through the top cooling opening.

Monday, July 20, 2020, 14:36: Roughing. Assistance req'd to close the doors.

Monday, July 20, 2020, 15:12: Turbo pumps on.

Monday, July 20, 2020, 15:17: Ion gauge on.

Monday, July 20, 2020, 15:26: TP1A tripped.

Monday, July 20, 2020, 16:00: Continued backing trips. Await pump down.

Monday, July 20, 2020, 16:29: Attempt Bypass.

Monday, July 20, 2020, 16:32: Trip on TMS:TP2? Odd. Restarted quick.

Monday, July 20, 2020, 16:34: TSG:TP1A & TSG:TP1B up to speed. Ion gauge on. Pumping down.

See: https://elog.triumf.ca/TIS/Test-Stand/802 for wiring spec. TGHT / TBHT (on coil) connected.

Tuesday, July 21, 2020, 07:16: Water lines Opened. No response on vacuum. Ok @ 2.13e-06T. 

Tuesday, July 21, 2020, 08:27: Ion gauge & Turbo pumps off. One more target / electrical check is required.

Tuesday, July 21, 2020, 09:50: Venting.

Tuesday, July 21, 2020, 10:19

Extech measurements (µOhm):

TGHT Left leg Ta-Cu: 205, 215, 212, 201.

TGHT Right leg Ta-Cu: 287, 295, 275, 292.

TGHT Ta legs: 596, 606, 597, 598.

TBHT A: 1470, 1471.

TBHT B: 1469, 1469.

Tuesday, July 21, 2020, 10:36: Roughing.

Tuesday, July 21, 2020, 13:06: Turbo pumps on.

Tuesday, July 21, 2020, 13:16: Ion gauge on.

Tuesday, July 21, 2020, 13:40: Lockout / power / sources on.

Wednesday, July 22, 2020, 09:28: Auto-ramping TGHT / TBHT to 100 / 100 A @ 4 A per min.

Wednesday, July 22, 2020, 09:54: Auto-ramping TGHT / TBHT to 200 / 200 A @ 4 A per min.

Wednesday, July 22, 2020, 10:30: Visual note @ 200 A. No glow noted on target or the legs. Auto-ramping TGHT / TBHT to 300 / 300 A @ 4 A per min.

Wednesday, July 22, 2020, 10:57: Visual note @ 300 A. The target is glowing & reflecting the glow on the legs. The glow is even. Vacuum @ 2.95e-06T (Allow to stabilize).

Wednesday, July 22, 2020, 11:05: Vacuum @ 2.24e-06T. Auto-ramping TGHT / TBHT to 400 / 400 A @ 4 A per min.

Wednesday, July 22, 2020, 11:26: Auto-ramp aborted. TGHT heating OK. TBHT moving off?

TGHT: "Set" to 384 A = 383.6 A

TBHT: "Set" to 384 A = 318.2 A

Wednesday, July 22, 2020, 11:34: Manually tap down by 10 A. TBHT increases as TGHT decreases.

TGHT: "Set" to 374 A = 373.6 A

TBHT: "Set" to 374 A = 325.4 A

Wednesday, July 22, 2020, 11:35: Manually tap down TGHT only by 10 A. TBHT increases as TGHT decreases.

TGHT: "Set" to 364 A = 363.4 A

TBHT: "Set" to 374 A = 331.3 A

Wednesday, July 22, 2020, 11:37: Manually tap down TBHT only by 10 A. No change.

TGHT: "Set" to 364 A = 363.4 A

TBHT: "Set" to 364 A = 331.4 A

Wednesday, July 22, 2020, 11:39: Manually tap down TGHT down to 350 A. TBHT increases as TGHT decreases.

TGHT: "Set" to 350 A = 349.5 A

TBHT: "Set" to 364 A = 339.0 A

Wednesday, July 22, 2020, 11:40: Tap down to TGHT & TBHT to 340 A.

Wednesday, July 22, 2020, 11:43: Adjust TBHT Voltage limit from 3.001 to 4.001 V.

Wednesday, July 22, 2020, 11:44: Manually tap up both TGHT &TBHT to 350 A.

TGHT: "Set" to 350 A = 349.5 A

TBHT: "Set" to 350 A = 348.9 A

Wednesday, July 22, 2020, 11:45: Auto-ramping TGHT / TBHT to 400 / 400 A @ 4 A per min.

Wednesday, July 22, 2020, 12:43: Auto-ramping TGHT / TBHT to 500 / 500 A @ 4 A per min.

Wednesday, July 22, 2020, 12:59: Adjust TBHT voltage limit from 4.001 to 6.001 V

Wednesday, July 22, 2020, 13:11: Visual note @ 500 A. The target  is glowing bright. Vacuum @ 2.51e-06T

Auto-ramping TGHT / TBHT to 550 / 550 A @ 4 A per min.

Wednesday, July 22, 2020, 13:25: TGHT / TBHT @ 550 A. Vacuum @ 2.74e-06T

 Wednesday, July 22, 2020, 13:27: Auto-ramping TGHT / TBHT to 600 / 600 A @ 4 A per min.

Wednesday, July 22, 2020, 13:41: TGHT / TBHT @ 600 A. Vacuum @ 3.23e-06T

Target visual. Center hot / Legs Ok. Bright. Use welding glasses to view. 

 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.

 The electrical feedthroughs at the top of the test stand module were reconfigured to deliver up to 1200A to the p2n target.

1) The two COIL lines (one + and one -) were disconnected from their terminals E and F

2) The TBHT terminals (two + and two -) were disconnected from A and B

3) The two TBHT positive terminals are connected to E and G respectively. The two TBHT negative terminals are both connected to F, and a 4/0 cable is run from F to H

4) The three TGHT + terminals are left connected to D. The three TGHT - terminals are left connected to C

In the vacuum chamber, COIL and TGHT terminals of the same polarity are shorted by means of thick copper bars specifically machined to match the test stand terminals geometry. The test can proceed by ramping both TGHT and TBHT up to 600 A each, possible at the same time and speed.

The wiring diagram is shown in the attached picture 

Extech measurements before heating (µOhm):

TGHT Left leg Ta-Cu: 205, 215, 212, 201.

TGHT Right leg Ta-Cu: 287, 295, 275, 292.

TGHT Ta legs: 596, 606, 597, 598.

TBHT A: 1470, 1471.

TBHT B: 1469, 1469.

Wednesday, July 22, 2020, 16:21

Rampup finished around 2PM, looks good. Around 300+300A the TBHT voltage limit prevented the TBHT current to increase, and instead it decreased. Aaron ramped it down, adjusted the voltage limit and proceeded without issues.

The water flow and temperatures looked fine.

Attached the plots and a picture at 1200A

 Thursday, July 23, 2020, 11:53

Frank Song checked for us the status of the test stand. Pictures looked good, despite the reflections, I can't see sign of the flexy legs glowing. Thank you Frank!

The voltage on the TGHT has dropped 0.02 V, and the voltage on the TBHT (COIL lines) has dropped by 0.04V in 20 hours. I think it's negligible, just a sign of some sintering.

The cooling parameters are as follows:

Input 1: 28.05 C

Input 2: 8.49 lpm

Input 3: 27.79 C

Input 4: 11.14 lpm

Input 5: 27.72 C

Input 6: 3.90 lpm

Input 7: 27.78 C

Input 8: 7.79 lpm

Friday, July 24, 2020, 16:42

This morning I saw the target for my first time and not in a picture. I could see a mild glow in the center of both flexy legs, while the external foils seemed cold. This seems really good, as expected!

Water parameters were checked:

Input 1: 27.75 C

Input 2: 8.38 lpm

Input 3: 27.52 C

Input 4: 11.13 lpm

Input 5: 27.37 C

Input 6: 3.93 lpm

Input 7: 27.53 C

Input 8: 7.78 lpm 

Monday, July 27, 2020, 09:35

Aaron's measurement from today at 7:30am

 Input 1: 26.61 C

Input 2:  8.25 lpm

Input 3: 26.35 C

Input 4: 11.19 lpm

Input 5: 26.21 C

Input 6: 3.84 lpm

Input 7: 26.35 C

Input 8: 7.76 lpm

FM

Thursday, July 30, 2020, 15:53: Auto-cooling TGHT/TBHT to 0 @ 4 A/min 

Thursday, July 30, 2020, 23:02

Ramp down terminated around 7pm, the current was ramped smoothly but the voltage from both PS (TGHT and TBHT) had some bumps in correspondance with vacuum response. Maybe something was shorting? A thorough inspection of the heat shield and target might tell more.

Thanks Fernando for ramping down! 

Tuesday, August 04, 2020, 07:33: PS / sources off. Lock out. IG & Turbo pumps off. Purge waterlines. - AS

Tuesday, August 04, 2020, 09:32

Started rewiring the test stand.

TBHT+ (A1 and A2): connected to A

TBHT- (B1 and B2): connected to B

COIL+ (A3): connected to E

COIL-(B3): connected to F

4/0 short connection from F to H removed

Tuesday, August 04, 2020, 15:27

Extech measurements after heating (µOhm):

TGHT Left leg Ta-Cu: 160, 176, 184, 180

TGHT Right leg Ta-Cu: 49, 48, 52, 53.

TGHT Ta legs: 470, 469, 463, 480.

TBHT A: 2400, 2229,2492.

TBHT B: 2361, 2411, 2412.

ABC 123 blah blah blah...

link to old e-log

Test stand vented

Friday, September 23, 2011, 16:3: The connection on the 9-pin connector for FEBIAD targets showed burn marks from the previous FEBIAD tests. Corresponding mark was found on the connector on the target side. Because of this the upper and lower 9-pin connectors were swapped to have a clean connector for the next FEBIAD target.

Anders Mjos wrote:

Friday, September 23, 2011, 16:3: The connection on the 9-pin connector for FEBIAD targets showed burn marks from the previous FEBIAD tests. Corresponding mark was found on the connector on the target side. Because of this the upper and lower 9-pin connectors were swapped to have a clean connector for the next FEBIAD target.

 See attachment#1: 9-pin-connector.jpg 

• While testing SiC#26 a leak was discovered on the water line to the heat shield. The leak was in the right joint (see attachment). The heat shield water lines were removed from the test stand and repaired in the Machine Shop. 
• Kapton was added to the FEBIAD coil line to prevent it from shorting to the target heater line (see attachment).

Anders Mjos wrote:

Variable leak valve with serial number F3-592 has been replaced by F3-649 due to regulating problems described previously by Fridhelm Ames.

 The variable leak valve F3-592 has been repaired. Contaminated diaphragm was replaced. See attachment for details.

Evgeniy rebooted the ISAC Test Stand IOC. Re-started EPICS at the Test Stand.

Found all 4 turbo pumps off and their backing valves closed. Re-started the pumps.

In January Controls will install a new firewall for ISAC Test Stand. Until then ISAC Test Stand can be used, but it may require an IOC reboot once in while.

Anders Mjos wrote:

Anders Mjos wrote: Variable leak valve with serial number F3-592 has been replaced by F3-649 due to regulating problems described previously by Fridhelm Ames.  The variable leak valve F3-592 has been repaired. Contaminated diaphragm was replaced. See attachment for details.

 The leak valve has been tested with He and a leak detector. The leak valve could regulate in the complete range of the leak detector. 10^-11 to 10^-4 atm cc/s

turbo pumps shut off due to work on cooling water system

All turbo pumps have been restarted after cooling water is back and running.

Both turbo pumps at the source box were found off. TSG:TP1A has been started normally. TSG:TP1B does not spin up above 3KRPM even after several attemps. A fault report has been send to vacuum group.