Wednesday, November 27, 2019, 15:31: During HV tests, bias was around 55kV when a spark occur and almost immediately the controller for TP6 made a noticeable noise and smoke started to come out of it.

Control room notified about the smoke.

Both turbo and IG6 were not affected.

Eddie was contacted for assessment, and a new controller (from OATIS)  was installed and tested. Turbo turned on without any issue.

Wednesday, November 27, 2019, 16:00: Resuming HV tests

Friday: Test to validate Ferran's assembly. The plan is to ramp up to operating current, apply high voltage, and possibly extract beam.

Turbos on. IG1. Power on.

Monday, December 02, 2019, 15:59: Auto-ramp to 230/600 A for TBHT/TGHT @ 2A/min and 4A/min  (0.5A/15 s 1 A/15s.)

Tuesday, December 03, 2019, 15:30: Sources on.

Tuesday, December 03, 2019, 15:41: Bias/EZL/EE @ 30/13/1.5 kV

 Bias/EE/EZL to 40/2.0/17 kV.

Bias/EE/EZL to 50/2.5/22 kV.

Bias/EE/EZL to 50/2.6/22.5 kV.

Spark. Inaudible

Tuesday, December 03, 2019, 17:26: Bias/EZL/EE to 0kV.

Tuesday, December 03, 2019, 17:26: Auto-cooling  @ 2A/min

Wednesday, December 04, 2019, 09:37: Power/sources off

Friday, December 20, 2019, 07:58: Turn off ion gauges. Shut off turbo pumps TP6, TP2, TP1A, & TP1B. Close backing valves.

Friday, December 20, 2019, 08:06: PV1 & PV2 off. RP1 & RP2 off.

Monday, January 06, 2020, 09:35: Restarting TS. RP1 & RP2 on. (BIAS PS upgraded / Note: https://elog.triumf.ca/TIS/Test-Stand/776 ). No HV as yet.

Monday, January 06, 2020, 09:37: Turbo pumps (TP6, TP2, TP1A, & TP1B) on.

Monday, January 06, 2020, 09:42: Ion gauges on (IG1 & IG6).

Monday, January 20, 2020, 08:17: Ion gauge. Turbos pumps off.

Monday, January 20, 2020, 10:26: Venting.

A new power supply was installed today by John Chow. Due to differences in pin configuration of the controls, a change to the cabling is required. Contacted controls (Julie) for support.

Tuesday, January 21, 2020, 13:42: The RGA was unable to connect. Typically connects on COM4, however it did not register. RGA Offline.

Brought in a separate RGA. Was able to connect & see the 2nd RGA ID on COM4. Removed 2nd RGA.

We likely need to replace / repair our communication chip again.

Wednesday, January 22, 2020, 13:21: The chip was replaced and the RGA reinstalled, however, the RGA is still no connecting on COM4.

Thursday, January 23, 2020, 16:05: Restarting vacuum and TPs

Anders Mjos wrote:

A new power supply was installed today by John Chow. Due to differences in pin configuration of the controls, a change to the cabling is required. Contacted controls (Julie) for support.

 Ray from controls has updated EPICS and changed the cabling today. The power supply is operational.

NOTE: Current limit will need to be set in EPICS. Default value should be 0.1 mA for now.

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.

 https://elog.triumf.ca/TIS/Test-Stand/791

https://elog.triumf.ca/TIS/Test-Stand/792

Tuesday, May 19, 2020, 06:01: Venting. 

Troubleshoot / Leak Check ISAC TS.

Tuesday, May 19, 2020, 06:35: Quite a bit of condensation was found inside the TS. Most lines had water on them.

Tuesday, May 19, 2020, 07:09: Wiped out the interior. Running a fan inside to aid in the drying.

Tuesday, May 19, 2020, 08:20:

Opened lines FS#2,3,4. No visual leaks detected.

Installed previously used/outgassed HS (Ferran's tests). Replaced all the bolts.

Roughing.

Tuesday, May 19, 2020, 08:32: Multiple attempts made to rough. Doors not sealing?

Tuesday, May 19, 2020, 08:58: IT FINALLY SEALED!!! (Assistance was provided on the doors)

Tuesday, May 19, 2020, 09:02: BV1B Open.

Tuesday, May 19, 2020, 10:54: Vacuum @ 15.339 T.

Tuesday, May 19, 2020, 10:59: FS#2 opened.

Tuesday, May 19, 2020, 11:02: Vacuum @ 15.069 T.

Tuesday, May 19, 2020, 11:03: FS#3 opened.

Tuesday, May 19, 2020, 11:06; Vacuum @ 15.069 T

Tuesday, May 19, 2020, 11:07: FS#4 opened.

Tuesday, May 19, 2020, 11:10: Vacuum @ 15.069 T.

Tuesday, May 19, 2020, 11:11: FS#5 Opened.

Tuesday, May 19, 2020, 11:13: Vacuum @ 15.069 T.

Tuesday, May 19, 2020, 11:30: Close & purge cooling lines. Observe Vacuum.

Left open overnight. Ran the fan on it this morning.

All water lines into the TS closed. FS# 2,3,4,5, & 8.

Wednesday, May 20, 2020, 08:35: Roughing.

Wednesday, May 20, 2020, 08:50: BV1B open. Vacuum at 8 T and dropping.

Wednesday, May 20, 2020, 10:12: Vacuum at 2.635 T.

Wednesday, May 20, 2020, 10:14: FS#2 opened.

Wednesday, May 20, 2020, 10:17: Vacuum @  2.646 T.

Wednesday, May 20, 2020, 10:19: FS#3 opened.

Wednesday, May 20, 2020, 10:24: Vacuum @ 2.764  T

Wednesday, May 20, 2020, 10:25: FS#4 opened.

Gradual increase is noted, but no obvious spike.

Wednesday, May 20, 2020, 10:28: Vacuum @  2.816 T.

Wednesday, May 20, 2020, 10:32: Vacuum @ 3.606 T.

Starting to spike.

Wednesday, May 20, 2020, 10:36: Closed supply / return. Purged. Closed the lines Vacuum @  4.173 T.

Wednesday, May 20, 2020, 10:54: Vacuum @ 3.984 T.

Wednesday, May 20, 2020, 10:58: FS#2 opened.

Wednesday, May 20, 2020, 11:10: Vacuum @ 3.858 T.

Wednesday, May 20, 2020, 11:11: FS#3 opened. Vacuum spiking 4.3T +

Wednesday, May 20, 2020, 11:15: Closed supply / return. Purged. Closed the lines Vacuum @  4.614 T.

Wednesday, May 20, 2020, 11:47: Venting.

Wednesday, May 20, 2020, 13:12: Significant leak discovered on FS#3. Pressurized the lines to full pressure with water and waited 15 minutes. Small drops seen pushing out from the water block.

Removed old O-ring (Appeared to have a warp/bulge, very faint) Replaced with Sn C-Seal "Small Package" MIL-DTL-117H-TII C-E S-I / MIL-PRF-131K C-II.

T= 0.095"

D= 0.424"

Wednesday, May 20, 2020, 14:02: Roughing.

Wednesday, May 20, 2020, 14:08: BV1B open.

Wednesday, May 20, 2020, 15:28: Vacuum @ 1.242 T

Wednesday, May 20, 2020, 15:29: Open FS#3.

Wednesday, May 20, 2020, 15:31: Close FS#3 supply / return. Purged. Closed the lines Vacuum @  2.462 T.

Wednesday, May 20, 2020, 15:42: Start venting to 200 T. 

Removed Right coil line on FS#3 and blanked it off (G) (H).

Monday, May 25, 2020, 14:00: Roughing.

Monday, May 25, 2020, 14:02: BV1B open.

Monday, May 25, 2020, 15:16: Turbo pumps on.

Monday, May 25, 2020, 15:25: Ion gauge on.

Wednesday, May 27, 2020, 10:28: Ion gauge & turbo pumps off. 

FS#(G)(H) right coil line -  Lower G water block replaced leak checked / cleaned.

Line re-installed.

Wednesday, May 27, 2020, 12:56: Roughing.

Wednesday, May 27, 2020, 13:39: Turbo pumps on.

Wednesday, May 27, 2020, 13:47: Ion gauge on.

Monday, June 01, 2020, 06:47: Vacuum @ 5.12e-06T

Monday, June 01, 2020, 06:50: FS#3 opened. Vacuum @ 5.12e-06T.

Monday, June 01, 2020, 06:57: FS#2 opened. Vacuum @ 5.12e-06T.

Monday, June 01, 2020, 07:01: FS#4 opened. Vacuum @ 5.12e-06T.

Monday, June 01, 2020, 07:04: FS#5 opened. Vacuum @ 5.10e-06T.

Monday, June 01, 2020, 07:12: PS on

Monday, June 01, 2020, 07:15: FS#8 opened. Vacuum @ 5.03e-06T.

Monday, June 01, 2020, 07:16: Sources on.

Monday, June 01, 2020, 07:18: Auto-ramping TGHT / TBHT to 300 / 150 A @ 2 A per min. Vacuum limits adjusted:

7.000e-06 Vacuum ok, increment when less than this value.

8.000e-06 Vacuum exceeds, the last increment on TGHT / TBHT is backed off.

Monday, June 01, 2020, 09:17: Halt, adjust. Continue Auto-ramping TGHT / TBHT to 350 / 200 A @ 2 A per min.Vacuum @5.19 e-06T

Monday, June 01, 2020, 10:37: Auto-ramping TGHT / TBHT to 400 / 200 A @ 2 A per min.Vacuum @ 6.29e-06T.

Monday, June 01, 2020, 11:05: Auto-ramping TGHT / TBHT to 450 / 200 A @ 2 A per min.Vacuum @ 6.70e-06T.

Monday, June 01, 2020, 12:18: Tripped* restarted* Auto-ramping TGHT / TBHT to 350 / 150 A @ 4 A per min.Vacuum @ 6.70e-06T.

Tripped as the TGHT / TBHT "good vac" interlock is at 7.30e-06T.

Monday, June 01, 2020, 17:10: Lowered TGHT to 325A to avoid a trip and continue outgassing. Vacuum @ 7.00e-06T.

Tuesday, June 02, 2020, 06:06: Manually tap TGHT up to 350 A.

Tuesday, June 02, 2020, 06:39: Manually tap TGHT up to 375 A.

Wednesday, June 03, 2020, 09:37: Manually tap TGHT up to 400 A. Vacuum, @ 6.68e-06T.

Wednesday, June 03, 2020, 09:44: Manually tap TGHT up to 400 A. Vacuum, @ 6.90e-06T.

Wednesday, June 03, 2020, 10:45: Tripped* restarted* Auto-ramping TGHT / TBHT to 400 / 200 A @ 4 A per min.Vacuum @ 5.53e-06T.

Friday, June 05, 2020, 06:19: Manually tap TGHT up to 425 A. 

Tuesday, June 09, 2020, 19:57: Auto-Cooling from 475 A to 0 A @ 1 A per min. 

Wednesday, June 10, 2020, 06:32: PS off. Ion Gauge off. Turbo pumps off. 

 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)