Tuesday, February 11, 2020, 14:27: UC#32 HS removed.

Tuesday, February 11, 2020, 14:27: Roughing.

Wednesday, February 12, 2020, 09:05: Venting.

Thursday, February 27, 2020, 07:10: Swapped out an old brass fitting on the supply line going into FS#3 - Line K.

Replaced w/ SS fitting for interchangeability w/ other lines in case a bypass is needed.

Wednesday, March 04, 2020, 17:13: EPICS page indicated a sucesful scan but data was empty.

Wednesday, March 04, 2020, 17:13: Power suppply didn't respond to the voltage sweep

Wednesday, March 04, 2020, 17:14: Problem most likely similar to elog entry 531.

Wednesday, March 04, 2020, 17:14: Keiko contacted for a soft reboot.

Wednesday, March 04, 2020, 17:14: Emittance power supply now  responds.

The ISAC was left with the turbo pumps and water supplies running. Just the power supplies off. Monday, March, 23, 2020.

Check daily

Thursday, March 26, 2020, 13:25: Vacuum ok at 3.2e-07T. All status ok.

Friday, March 27, 2020, 09:00: Checked via epics. There appears to have been a trip. 

Vacuum at 7.953T . The trip looks to have occurred around midnight. (See attached*)

Friday, March 27, 2020, 11:15: MCR shut down supply / return on DI water supply to be on the safe side.

Friday, March 27, 2020, 11:20: Monitor. Control room has my cell number now as well as it's on my TRIUMF profile. Beam line side ok.

Monday, March 30, 2020, 06:26: Vacuum @ 8.583T.

Tuesday, March 31, 2020, 10:03: Vacuum @ 8.016T. 

Wednesday, April 01, 2020, 11:51: Vacuum @ 8.205T.

Thursday, April 02, 2020, 11:41: Vacuum @ 8.709T.

Friday, April 03, 2020, 05:05: Vacuum @ 9.213T. 

Tuesday, April 07, 2020, 10:46: Vacuum @ 11.922T. 

Tuesday, April 28, 2020, 11:11: Venting. 

Aaron Schmidt wrote:

The ISAC was left with the turbo pumps and water supplies running. Just the power supplies off. Monday, March, 23, 2020. Check daily Thursday, March 26, 2020, 13:25: Vacuum ok at 3.2e-07T. All status ok. Friday, March 27, 2020, 09:00: Checked via epics. There appears to have been a trip.  Vacuum at 7.953T . The trip looks to have occurred around midnight. (See attached*) Friday, March 27, 2020, 11:15: MCR shut down supply / return on DI water supply to be on the safe side. Friday, March 27, 2020, 11:20: Monitor. Control room has my cell number now as well as it's on my TRIUMF profile. Beam line side ok. Monday, March 30, 2020, 06:26: Vacuum @ 8.583T. Tuesday, March 31, 2020, 10:03: Vacuum @ 8.016T.  Wednesday, April 01, 2020, 11:51: Vacuum @ 8.205T. Thursday, April 02, 2020, 11:41: Vacuum @ 8.709T. Friday, April 03, 2020, 05:05: Vacuum @ 9.213T.  Tuesday, April 07, 2020, 10:46: Vacuum @ 11.922T.

Tuesday, April 07, 2020, 10:53:

Tried pumping down chamber with roughing pump. Looks like there is water in the system. Will leave it as is for now.

Tuesday, April 28, 2020, 12:30

Removed SiC#40 target and pumped down with HS lines blanked off. Used recycled SST gaskets.

Tuesday, April 28, 2020, 13:00

Still problem with water in the system. CG1 at about 25 Torr. Purging all water lines and pumping down again.

 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.

 Fault: 13334

Tuesday, July 28, 2020, 12:00: Leak discovered in ISAC Test Stand MB1 PS. Appears to be coming from hose barb soldered connection to heat sink of pass bank. Pass bank will need to be disassembled and heat sink soldered on a workbench.

Wednesday, August 05, 2020, 10:00: TP6 & TP2 off. IG6 off.

Wednesday, August 05, 2020, 12:20: RP2 swapped with a smaller roughing pump from the hot lab.

Wednesday, August 05, 2020, 12:25:  Roughing.

Wednesday, August 05, 2020, 13:53: Open BV2 to beam line chamber.

Wednesday, August 05, 2020, 14:21: Turbo pumps on.

Wednesday, August 05, 2020, 14:25: Ion gauge on. Turbo pumps at speed.

PN: X3815-64000

SN: MY2005SA02

Description: IDP15 Scroll pump, Std.

Removed old Tri-Scroll, Check voltage setting. set to 115V.

Tuesday, August 18, 2020, 09:57: Installed & check. Roughing line to PV1

Tuesday, August 18, 2020, 10:04: Connection ok. Await chamber close after.

Tuesday, August 18, 2020, 13:30: Disengage shipping locks*

Wednesday, August 19, 2020, 08:52: Purging all lines, except FS#5, It was already purged / closed.

Wednesday, August 19, 2020, 11:24: Vacuum @ 1.76e-06T.

Wednesday, August 19, 2020, 11:29: FS#2 opened. Observable vacuum spike noted. vacuum @ 2.2e-06T. Purge & Close.

Wednesday, August 19, 2020, 11:34: Vacuum @  1.76e-06T.

Wednesday, August 19, 2020, 11:36: FS#3 opened. Vacuum  @ 1.74e-06T.

Wednesday, August 19, 2020, 11:44: Vacuum @  1.67e-06T.

Wednesday, August 19, 2020, 11:47: FS#4 opened. Vacuum @ 1.65e-06T

Wednesday, August 19, 2020, 11:51: No spike observed

Wednesday, August 19, 2020, 11:52: Turbo Pumps off. To vent for Leak check w/ LD & He.

Thursday, August 20, 2020, 11:26: Blanked off & connected feed through (C) & (D) individually. Both to 120 PSI individually w/ He. No leak detected. 

Thursday, August 20, 2020, 11:35: Roughing.

Thursday, August 20, 2020, 13:00: TP1B started.

Thursday, August 20, 2020, 13:09: Before opening back valve w/ LD:

LD: 0.0e-09 atm-cc/sec

Thursday, August 20, 2020, 13:10: Opened valve.

LD: 2.2e-07 atm-cc/sec & Dropping. Likely left over from the lines initial tests. Vacuum @ 3.2e-04T & dropping.

Thursday, August 20, 2020, 13:17: 120 PSI of He on line (D) TGHT left side.

 LD: 1.3e-07 atm-cc/sec & Dropping. Vacuum @ 2.09e-04T & dropping.

Thursday, August 20, 2020, 13:27: LD: 1.0e-07 atm-cc/sec & Dropping. Vacuum @ 1.27e-04T & dropping. Disconnect He up top.

Thursday, August 20, 2020, 13:40: LD: 1.2e-07 atm-cc/sec. Vacuum @ 9.95e-05T & dropping. Connected He up top to line (C) TGHT right side.

Thursday, August 20, 2020, 13:43: 120 PSI on line. Spike occurring on TSG CG1A & TSG:CG1 B.

Thursday, August 20, 2020, 13:53: LD: 2.0e-07 atm-cc/sec. Vacuum @ 7.57e-05T & dropping. Gradual increase on leak rate for line (C)

Tuesday, August 25, 2020, 07:07: Beam line side of the TS tripped? Open BV6 & BV2.

Tuesday, August 25, 2020, 07:15: Beam line side TP6 & TP2 on.

Tuesday, August 25, 2020, 07:16: Venting Chamber side

Tuesday, August 25, 2020, 15:39: Aluminum water loop block installed. Roughing.

Tuesday, August 25, 2020, 19:11: Turbo pumps TP1A & TP1B on.

Tuesday, August 25, 2020, 19:13: TP1A off to avoid a trip.

Tuesday, August 25, 2020, 19:50: TP1A on. BV1A Bypass on 

Tuesday, August 25, 2020, 19:58: Ion gauge on. 

Wednesday, August 26, 2020, 06:15: BV1A Bypass off.

Multiple checks done on right TGHT (C) in the cold lab. Inconclusive leak detection

Reconnect He & LD to TS. TGHT (C) with Loop block in place.

Thursday, August 27, 2020, 08:09: Vacuum @ 1.49e-06T

Thursday, August 27, 2020, 08:11: Before opening back valve w/ LD:

LD: 0.0e-09 atm-cc/sec

Thursday, August 27, 2020, 08:13: Opened valve behind TP1B.

Thursday, August 27, 2020, 08:16:

LD: 0.0e-09 atm-cc/sec. Vacuum @ 1.49e-06T.

Thursday, August 27, 2020, 08:18: 120 PSI of He on line (C) TGHT Right side w/ loop block.

Thursday, August 27, 2020, 08:21: LD:  0.0e-09 atm-cc/sec. Vacuum @ 1.49e-06T.

Thursday, August 27, 2020, 08:31: Increase /  bump noted on LD

Thursday, August 27, 2020, 08:34: LD: 1.4e-08 atm-cc/sec. Slowly increasing. Vacuum @ 1.49e-06T.

Thursday, August 27, 2020, 08:39: LD: 4.0e-08 atm-cc/sec. Slowly increasing. Vacuum @ 1.49e-06T.

Thursday, August 27, 2020, 08:42: Closed Valve behind TP1B. Purge He.

Thursday, August 27, 2020, 10:02: Ion gauge off. Turbo pumps off.

Thursday, August 27, 2020, 11:04: Venting:

Removed loop block. Polished/Cleaned seat surface to remove 2 scratches. Applied no o-rings w/ vacuum grease. Pressurized with 120 PSI on the line w/ sniffer. No leak detected.

Thursday, August 27, 2020, 13:44: Roughing.

Thursday, August 27, 2020, 13:46: BV1A opened.

Thursday, August 27, 2020, 17:39: TP1B on.

Thursday, August 27, 2020, 17:52: TP1A on 

Tuesday, September 01, 2020, 07:44: Vacuum @ 8.23e-07T

Before opening back valve w/ LD: 0.0e-09 atm-cc/sec

Tuesday, September 01, 2020, 07:46: Opened valve behind TP1B.

Tuesday, September 01, 2020, 07:57: LD: 0.0e-09 atm-cc/sec. Vacuum @ 8.23e-07T.

Tuesday, September 01, 2020, 07:59: 120 PSI of He on line (C) TGHT Right side w/ loop block.

Tuesday, September 01, 2020, 08:20: LD:  0.0e-09 atm-cc/sec. Vacuum @ 8.16e-07T.

Tuesday, September 01, 2020, 08:21: Random Spike? Vacuum remained the same, however the LD jumped from 0.0e-09 atm-cc/sec to the mid-e-08 atm-cc/sec range. Literally for a couple seconds, then back to 0.0e-09 atm-cc/sec.

Odd, couple more random spikes.

Tuesday, September 01, 2020, 08:24: Closed valve behind TP1B to see if the spikes continue.

Tuesday, September 01, 2020, 08:34: Opened the TP1B valve. Immediate spike from 0.0e-09 atm-cc/sec to 2.2e-08 & 7.9e-08 atm-cc/sec noted.

Tuesday, September 01, 2020, 08:36: Close the valve behind TP1B. LD off.

Tuesday, September 01, 2020, 14:00:

New tubing installed.

Blue on FS#4 loop (A)(B)

Yellow on FS#2 Loop (C)(D)

Vacuum @ 8.30e-07T

Tuesday, September 01, 2020, 14:04: Opened FS#4 Vacuum stable @ 8.30e-07T.

Tuesday, September 01, 2020, 14:06: Opened FS#2 Vacuum stable @ 8.30e-07T.

Tuesday, September 01, 2020, 14:36: Closed FS#2 but not purged.. Vacuum stable @ 8.23e-07T.

Wednesday, September 02, 2020, 07:26: Ion gauge & Turbo pumps off. 

Wednesday, September 02, 2020, 08:50: Venting.

Install right TGHT (C)(D) line. Install FEBIAD. Clean out odd buildup / powder beneath optics tray.

Wednesday, September 02, 2020, 10:48: Roughing.

Wednesday, September 02, 2020, 11:19: TP1B on.

Thursday, September 03, 2020, 11:00: Vacuum @ 1.05e-06T. Waterlines are to be opened.

Thursday, September 03, 2020, 11:03: Opened FS#2. Vacuum Stable @ 1.03e-06T.

Thursday, September 03, 2020, 11:05: Opened FS#3. Vacuum Stable @ 1.03e-06T.

Thursday, September 03, 2020, 11:06: Opened FS#4. Vacuum Stable @ 1.03e-06T.

Thursday, September 03, 2020, 11:08: Opened FS#5. Vacuum Stable @ 1.03e-06T.

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.

Tuesday, August 25, 2020, 07:07: Beam line side of the TS appears to have tripped? Open BV6 & BV2.

Tuesday, August 25, 2020, 07:15: Beam line side TP6 & TP2 on.

Tuesday, August 25, 2020, 07:16: Venting Chamber side

Trip appears to have occurred at 6am on Saturday.

Contacted MCR. Power bump occurred.

Tuesday, September 01, 2020, 14:00:

New tubing installed.

Blue on FS#4 loop (A)(B)

Yellow on FS#2 Loop (C)(D)

Installed Indium gasket on FS#2 - (C) water block / R- TGHT.

Tuesday, September 29, 2020, 11:23: Pressurize to 120 PSI at atmosphere.

LD: 0.0E-07 atm-CC/sec

Tuesday, September 29, 2020, 11:30: LD: 0.0E-07 atm-CC/sec checked & held on gasket / water block (C) for min minutes. No LD response.

Tuesday, September 29, 2020, 11:56: Roughing.

Tuesday, September 29, 2020, 12:28: TP1B on.

Tuesday, September 29, 2020, 13:10: TP1A on. IG1 on.

Tuesday, September 29, 2020, 16:10: Vacuum @ 8.66e-06T.

Tuesday, September 29, 2020, 16:13: FS#2 opened. Vacuum @ 8.48e-06T.

Tuesday, September 29, 2020, 16:23: Opened FS#5. Vacuum ok

Tuesday, September 29, 2020, 16:25: Opened FS#4. Vacuum ok

Tuesday, September 29, 2020, 16:27: Opened FS#3 Vacuum ok @ 8.13e-06T.

Monday, November 02, 2020, 08:46:

Large Vacuum spike noted 5:30 approx. Tripped TS. On tail end of the Nb#9 conditioning run. HV & heating were completed last week

Monday, November 02, 2020, 08:47: Vacuum @ 2.66e-06T.

Monday, November 02, 2020, 08:50: Closed and purged all the TS waterlines. Vacuum dropped to 1.31e-06T and continues to drop.

Monday, November 02, 2020, 08:59: Vacuum @ 1.05-06T.

Monday, November 02, 2020, 09:00: FS#5 opened. No response on vacuum.

Monday, November 02, 2020, 09:05: Vacuum @ 1.05e-06T.

Monday, November 02, 2020, 09:07: FS#2 opened. No response on vacuum.

Monday, November 02, 2020, 09:12: Vacuum @ 9.98e-07T.

Monday, November 02, 2020, 09:13: Opened FS#3. No response on vacuum.

Monday, November 02, 2020, 09:19: Vacuum @ 9.96e-07T.

Monday, November 02, 2020, 09:21: Opened FS#4. Immediate vacuum spike noticed. 1.69e-06T and climbing.

Monday, November 02, 2020, 09:26: Closed & purged all the waterlines. Vacuum dropped back down to 9.97e-07T.

Monday, November 02, 2020, 09:27: IG1 off. Turbo pumps off.

Tuesday, November 03, 2020, 10:10: Indium gasket on FS#4 checked w/ sniffer / LD w/ He. ok.

Tuesday, November 03, 2020, 10:30: 120 PSI on line FS#4 feed through (A) Center - TBHT. 0.0E-07 atm-cc/sec.

Tuesday, November 03, 2020, 10:45: LD @ 0.0E-07 atm-cc/sec. Purge the line.

Tuesday, November 03, 2020, 10:51: 120 PSI on line FS#4 feed through (B) Sides - TBHT. 0.0E-07 atm-cc/sec.

Tuesday, November 03, 2020, 11:08: LD @ 0.0E-07 atm-cc/sec. Purge the line.

Tuesday, November 03, 2020, 11:12: 120 PSI on line FS#4 feed through (A) Center - TBHT. 0.0E-07 atm-cc/sec.

Tuesday, November 03, 2020, 11:20: Purge lines. Leak not found w/ LD-Sniffer.

Tuesday, November 03, 2020, 11:30: Roughing.

Tuesday, November 03, 2020, 12:24: TP1B on. 

Tuesday, November 03, 2020, 13:04: TP1A & IG1 on. 

Tuesday, November 03, 2020, 14:26: LD: 0.0E-09 atm-cc/sec. Vacuum @ 1.75e-05T

Tuesday, November 03, 2020, 14:26: Open to the chamber. LD: 2.6E-07 atm-cc/sec. Vacuum @ 1.66e-05T.

Tuesday, November 03, 2020, 14:29: Purged FS#4 w/ HPA.

Tuesday, November 03, 2020, 14:33: LD: 2.5E-07 atm-cc/sec. Vacuum @ 1.59e-05T.

Tuesday, November 03, 2020, 14:38: Connect 120 PSI on line FS#4 feed through (A) Center - TBHT. LD: 2.3E-07 atm-cc/sec. Vacuum @ 1.59e-05T.

Tuesday, November 03, 2020, 14:58: LD: 2.1E-07 atm-cc/sec. Vacuum @ 1.40e-05T. Purge line.

Tuesday, November 03, 2020, 15:02: Connect 120 PSI on line FS#4 feed through (B) Sides - TBHT. 2.2E-07 atm-cc/sec. Vacuum @ 1.31e-05T.

Tuesday, November 03, 2020, 15:22: LD: 2.7E-07 atm-cc/sec. Vacuum @ 1.24e-05T. Purge line.

Tuesday, November 03, 2020, 15:27: Disconnected LD. Disconnected HE. Purged FS#4 w/ HPA. Test again in the morning. FS#4 - B appears to be the source of the leak.

Wednesday, November 04, 2020, 08:35: LD: 0.0E-09 atm-cc/sec. Vacuum @ 2.40e-06T

Wednesday, November 04, 2020, 08:37: Open to the chamber. LD: 1.8E-08 atm-cc/sec. Vacuum @ 2.40e-06T.

Wednesday, November 04, 2020, 08:41: Connect 120 PSI on line FS#4 feed through (A) Center - TBHT. LD: 1.4E-08 atm-cc/sec. Vacuum @ 2.40e-06T.

Wednesday, November 04, 2020, 08:46: LD: 1.4E-08 atm-cc/sec. Vacuum @ 2.40e-06T.

Wednesday, November 04, 2020, 08:51: Connect 120 PSI on line FS#4 feed through (B) Sides - TBHT. 1.5E-08 atm-cc/sec. Vacuum @ 2.40e-06T.

Wednesday, November 04, 2020, 09:01: LD: 3.0E-08 atm-cc/sec. Vacuum @ 2.31e-06T.

Wednesday, November 04, 2020, 09:07: Disconnected LD. Flushed lines w/ HPA. Vacuum @ 2.31e-06T.

Wednesday, November 04, 2020, 09:10: Open FS#2 & FS#3. Vacuum @ 2.33e-06T. Ok.

Wednesday, November 04, 2020, 09:11: Opened FS#4. Vacuum @ 2.42e-06T.

Wednesday, November 04, 2020, 09:18: Vacuum @ 2.42e-06T.

Wednesday, November 04, 2020, 09:19: IG1 & turbo pumps off. Purge waterlines.

Wednesday, November 04, 2020, 10:28: Venting.

Opened / inspected water block (B) and the line. ok. Swap out O-rings w/ new ones w/ vacuum grease.

Wednesday, November 04, 2020, 12:06: Roughing.

Wednesday, November 04, 2020, 12:57: TP1B on. 

Wednesday, November 04, 2020, 13:06: TP1A on. 

Wednesday, November 04, 2020, 13:16: IG1 on. 

Wednesday, November 04, 2020, 15:54: Vacuum @ 4.37e-06T.

Wednesday, November 04, 2020, 15:56: Opened FS#2 & FS#3. Vacuum @ 4.29e-06T. OK.

Wednesday, November 04, 2020, 15:59: Opened FS#4. Vacuum @ 4.29e-06T.

Wednesday, November 04, 2020, 16:12:  Vacuum @ 4.02e-06T & dropping.

Friday, November 06, 2020, 06:02: Vacuum @ 1.34e-06T ok. IG1 off. Turbo pumps off. 

TMSRP2 has been struggling since the power bump occurred Nov 18, 2020

Monday, November 23, 2020, 09:48: Open TMS:PV2.

Monday, November 23, 2020, 09:51: Close TMS:PV2. CG2B @ 0.515T.

Monday, November 23, 2020, 09:52: TMS:RP2 off.

After disconnecting the backing line to RP2, a lot of water poured out of the line. May have back tracked from the vapour off of RP1 and the leaks on the chamber side. Both are on the same line.

Monday, November 23, 2020, 13:06: TMS:RP2 swapped w/ old Tri-Scroll pump. RP2 on.

Monday, November 23, 2020, 13:23: TMS:TP6 & TMS:TP2 on.

Monday, November 23, 2020, 13:29: Switch over FL1  to FL2 on IG6 Filament. IG6 on.

Monday, November 30, 2020, 10:12: CG2B @ 0.131T. TP6 & TP2 off. IG6 off. Close PV2 & shut off RP2.

Monday, November 30, 2020, 10:31: RP2 large Tri-scroll pump swapped back out for the small Varian RP.

Monday, November 30, 2020, 10:32: RP2 on.

Monday, December 07, 2020, 11:06: Turbo pump TP6 on.

Monday, December 07, 2020, 11:11: Turbo pump TP6 up to speed. TP2 on.

Monday, December 07, 2020, 11:14: IG6 on.

Tuesday, December 01, 2020, 11:56 :

TSG:BIAS unplugged and controls pigtail (made by Ray) added in order to connect controls cable to TCS:BIAS, which is now installed in the same rack.

Basic controls testing done without turning on the power supply, controls max values scaled to 75kV, 5mA.

In process of grounding all features inside the faraday cage. New grounding will be marked with a label for easy identification later.

NOTE: we should get together in January to discuss test stand wiring, since I discovered another burned up connection (see next elog entry, #823).

Tuesday, December 01, 2020, 16:47 :

Grounding of all feedthroughs on the service cap complete and continuity checked.

Removed gas line with Fernando's approval, to make more space for our feedthrough.

Awaiting nylon insulator to proceed.

Between feedthroughs F (magnet coil) and B (tube heater negative), I found a jumper with two resistors that has been burned up. I am not sure when this happened, but it would be good to review the overall setup of the service cap wiring in the new year.

The cable connected to feedthrough Q where the multipin sits also looks burned.

Wednesday, December 02, 2020, 08:31 :

Added copper wire connection to multipin screw terminals in HV cage to make sure they are grounded.

Attached grounding rod to back of HV cage. Not ideal, but couldn't find a better place without making a extension to the cable. Will see what John Chow says. EDIT: John says it is ok for the tests, not for permanent.

Vented test stand to swap window positions. Swapped rightmost window on the door with two windows with window on the door with only one window. Replaced one oring, that on the single window. Cleaned the inside surfaces of both windows with methanol before re-installing. Roughing down just to make sure there are no major issues, at 0.313T and falling. EDIT: down to 0.015T overnight.

All breakers on HV cage panel are OFF.

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.

Thursday, December 03, 2020, 15:54 :

Got sign off from John Chow to run the system, though the nylon insulator was not ready when he came by. But we went over everything together.

Installed blue nylon insulator with all vacuum surfaces cleaned at least with methanol. No NPT fitting or tube installed, just testing service cap.

Thursday, December 03, 2020, 17:31 :

Tested voltage on the blue nylon insulator up to 75kV, left it at 75 for ~30mins. No sparking, no current drawn except occasionally when changing voltage and only ~1uA then.

Cleaned (but not very well...) the NPT fitting, copper tube, alligator clip and section of copper wire and installed these in the vacuum chamber. Will pump down overnight for testing tomorrow.

See attached photos for insulator setup and wire inside vacuum chamber.