A water to vacuum leak has been found on FS#3. The leak is not detected on the leak detector, but can be seen as an increase in vacuum and on partial water pressure on the RGA

Wednesday, April 12, 2017, 17:11: The leak is on circuit EG (Coil +). Confirmed with water pressure

Wednesday, April 12, 2017, 17:21: RGA off. Turbos stopped.

Wednesday, April 19, 2017, 13:00: Leak detector hooked up to TS. (Check Turbo)

Wednesday, April 19, 2017, 14:00: He to FS#3.

Wednesday, April 19, 2017, 14:31: Minimal response on leak detector. No response on RGA.

Wednesday, April 19, 2017, 14:36: Manual valve closed. Leak detector off. RGA off.

Wednesday, April 19, 2017, 14:37: FS#3 purged.

Wednesday, April 19, 2017, 14:39: Ion gauge off. Turbos off.

Wednesday, April 19, 2017, 14:44: Leak detector disconnected.

Thursday, April 20, 2017, 07:35: Venting

Thursday, April 20, 2017, 09:10: TRI-COIL CTL-FEBIAD removed.

Thursday, April 20, 2017, 09:23: Water lines (E) (G) removed w/ block. 

Thursday, April 20, 2017, 09:30: Roughing.

Thursday, April 20, 2017, 10:04: Turbos on.

Thursday, April 20, 2017, 13:15: Leak detector attached & turned on.

Thursday, April 20, 2017, 13:25: Water lines FS#5 opened to create loop. Pressurized @ 30 PSI.

Thursday, April 20, 2017, 13:45: RGA on.

Thursday, April 20, 2017, 13:58: All lines opened, purged, and re-pressurized @ 30 PSI with He.

Thursday, April 20, 2017, 14:15: Minimal response on Leak detector. No response on RGA.

Friday, April 21, 2017, 07:26: Vacuum @ 4.87E-07T. No He response on RGA. Lines still pressurized @ 30 PSI of Helium.

Friday, April 21, 2017, 10:19: Vacuum level close, but not optimal after 24 hrs. 2e-07T range is optimal.

Friday, April 21, 2017, 10:22: Adjustment of Turbo (TSG:TP1B) flanges. Stud Flange to Chamber (loose nuts found). brief vacuum spike noted.

Friday, April 21, 2017, 10:27: Turbo pump flange to Stud Flange tightened. No change on vacuum.

Friday, April 21, 2017, 10:41: Test Stand Exhaust cleaned. Clog noticed. Monitor Vacuum

Monday, April 24, 2017, 10:24: Three leaks found on FS#3. Two on the soldered ends of the VCRS (Mid-line) and one on the block. Requires repair/replacement.

Tuesday, May 02, 2017, 08:32 : RGA off.

Tuesday, May 02, 2017, 08:33: Ion gauge & Turbos off.

Tuesday, May 02, 2017, 12:55: Venting

Tuesday, April 18, 2017, 07:30: TSG : TP1B Tripped on Saturday.

Tuesday, April 18, 2017, 07:40: TSG : BV1B opened. TSG : TP1B restarted.

Tuesday, April 18, 2017, 07:48: TSG : TP1B failed to restart.Turn off.

Tuesday, April 18, 2017, 07:59: TSG : BV1B opened. TSG : TP1B restart attempt. No audible response detected.

Tuesday, April 18, 2017, 08:01: The turbo pump is off and BV1B closed. Fault report entered #9815.

Tuesday, April 18, 2017, 09:40: Ion gauge, remaining turbo pump off.

Tuesday, April 18, 2017, 13:00: Vacuum Group arrival to change TSG : TP1B.

Once the turbo pump cooling line was loosened slightly, a slight water leak occurred. Line snapped. Water leak. Valves to all turbo pump cooling closed.

***NOTE*** - From Thursday, November 24, 2016, 08:05: TMS:TP2

Friday, November 25, 2016, 14:45: Turbos at speed. Vacuum at 1.9E-5 T

*** Note *** : One of the copper cooling lines was leaking. The line was fixed. Monitor. <---- Due to this recurring issue, the decision was made to air cool the turbo pumps.

Tuesday, April 18, 2017, 14:10: Air cooling to replace water cooling. TSG : TP1A already has air cooling. Replace the cooling on the other 3 of 4 turbo pumps.

Tuesday, April 18, 2017, 15:27: All turbo pump cooling replaced with air cooling. TSG : TP1B successfully replaced.

Wednesday, April 19, 2017, 07:57: Roughing.

Wednesday, April 19, 2017, 09:01: Turbo pumps on. Bypass made on water flow (Still air cooled overall)

Wednesday, April 19, 2017, 09:15: TSG :TP1A accidentally tripped. Restarted.

Wednesday, April 19, 2017, 09:42: Both turbo pumps off. Unable to achieve proper vacuum.

Wednesday, April 19, 2017, 11:04: Roughing.

Wednesday, April 19, 2017, 11:44: TSG :TP1A on.

Wednesday, April 19, 2017, 11:51: TSG :TP1B on.

Check to fit lines FS#3

Tuesday, May 02, 2017, 14:00: Rouging. 

Wednesday, May 03, 2017, 07:07: Venting.

Check final fit. Mark up FS#3.

Wednesday, May 03, 2017, 08:11: Roughing.

Wednesday, May 03, 2017, 12:42: Venting.

Thursday, May 04, 2017, 13:35: FS#3 re-installed.

Thursday, May 04, 2017, 13:47: Roughing  w/ UC#20 IG-LIS heat shield.

FS#3 lines blanked off.

Wednesday, May 10, 2017, 14:40: Roughing

Wednesday, May 10, 2017, 15:05: Turbos on.

Wednesday, May 10, 2017, 15:10: Ion gauge on.

Disconnect Leak detector. Connect He to FS#3 (G) line.

Thursday, May 11, 2017, 07:44: RGA on.

Thursday, May 11, 2017, 08:23: Vacuum @ 1.85e-06T. He line pressurized to 50 PSI. Monitor RGA.

Thursday, May 11, 2017, 09:07: No response on RGA. Vacuum @ 1.85e-06T. Purge Helium.

Hook up dry system leak detector to leak check valve behind turbo.

Leak rate: 0.0e-09 atm-cc/sec on detector. T.P: 0.0e-04T.

Thursday, May 11, 2017, 09:18: Open check valve. Vacuum ok @ 1.76e-06T

Base leak rate: 2.5e-09 atm-cc/sec.

Thursday, May 11, 2017, 09:25: Open He & Pressurize to 50 PSI.

Thursday, May 11, 2017, 09:30: Base leak rate dropping slowly: 2.0e-09 atm-cc/sec. No leak detected. No response on RGA.

Thursday, May 11, 2017, 09:35: Base leak rate dropping slowly: 1.7e-09 atm-cc/sec. No leak detected. No response on RGA.

Thursday, May 11, 2017, 09:45: Base leak rate Ok: 1.7e-09 atm-cc/sec. No leak detected. No response on RGA. Close check valve. Purge line. Vent detector.

Leak detector on. Leak rate: 0.0e-09 atm-cc/sec on detector. T.P: 0.0e-04T.

Thursday, May 11, 2017, 13:24: Open check valve. Vacuum @ 1.41e-06T

Base leak rate: @.2.0e-09 atm-cc/sec.

Thursday, May 11, 2017, 13:30: Open He & Pressurize to 50 PSI.

Thursday, May 11, 2017, 13:37: Base leak rate dropping slowly: 1.0e-09 atm-cc/sec. No leak detected. No response on RGA.

Thursday, May 11, 2017, 13:40: Base leak rate Ok: 0.1e-09 atm-cc/sec. No leak detected. No response on RGA. Vent He.

Connect spray nozzle to He. Vacuum issue noticed on RGA: N & O. Check for leak on Chamber

Tuesday, May 16, 2017, 08:45: RGA off. Ion gauge off. Turbos off

Tuesday, May 16, 2017, 09:50: Venting

 The Test Stand has been configured for Anode bias. John Chow changed the power supply and the electrical connections have been wired according to ISK4523D REV 6.

Wednesday, May 24, 2017, 17:37: Anode current reduce to 285 A. Anode drain current limited  to a maximum of 300 A. This will be left overnight to see if there is an increase in anode drain current. as was seen today.

Anders Mjos wrote:

The Test Stand has been configured for Anode bias. John Chow changed the power supply and the electrical connections have been wired according to ISK4523D REV 6.   Wednesday, May 24, 2017, 17:37: Anode current reduce to 285 A. Anode drain current limited  to a maximum of 300 A. This will be left overnight to see if there is an increase in anode drain current. as was seen today.

 The Test Stand has been  configured for Cathode bias. John Chow changed the power supply and the electrical connections have been wired according to ISK4563 REV 5.

Tuesday, June 06, 2017, 09:21: roughing.

Friday, June 09, 2017, 08:50: Ion gauge off. Turbo pumps off.

Friday, June 09, 2017, 10:46: Venting.

 Gas bottles for FEBIAD testing were exchanged yesterday around 1:30. One Neon & one Argon bottle were removed.

Two Neon bottles were added.

Friday, June 16, 2017, 11:22: roughing.

Friday, June 16, 2017, 14:28: Turbo pumps on

Friday, June 30, 2017, 10:37: Ion gauge, turbos off.

Friday, June 30, 2017, 13:01: Venting.

-No EE. Insulators, gripper arms, and blank EE plate included

-New grounded 9 pins included in brackets

-TGHT included to out gas Heat shield

Monday, July 17, 2017, 10:48: Roughing.

Monday, July 17, 2017, 11:08: Turbo pumps on.

Monday, July 17, 2017, 11:17: Ion gauge & RGA on.

Tuesday, July 18, 2017, 08:17: Water lines opened. No response on RGA. Vacuum stable @ 1.79e-07T.

Tuesday, July 18, 2017, 08:20: Power/sources on.

Tuesday, July 18, 2017, 08:25: Auto-ramping TGHT to 580A @ 2A per min. Vacuum @ 1.44e-07T.

Wednesday, July 19, 2017, 08:00: Auto cooling TGHT.

Monday, July 24, 2017, 07:38: Power/sources off.

Monday, July 24, 2017, 07:40: Waterlines purged

Monday, July 24, 2017, 07:42: RGA off. Ion gauge off. Turbos off.

Monday, July 24, 2017, 09:10: Venting.

Attached is a recent list of Ta targets with their extracted ions peaks.

 Thursday, August 03, 2017, 17:00: Restarted TPs

 The Xantrex 10V 600 A power supply for the TBHT has been moved to ITE to replace the failed TGHT power supply

Anders Mjos wrote:

The Xantrex 10V 600 A power supply for the TBHT has been moved to ITE to replace the failed TGHT power supply

 A spare EMI-EMS 10 V - 500 A power supply was installed last Friday by John Chow. Dave Morris has connected the controls today and updated EPICS. The local voltage readback on the power supply does not work.

Monday, September 25, 2017, 14:10: Roughing.

Wednesday, September 27, 2017, 08:23: Turbo pumps on

Friday, October 06, 2017, 09:04: Ion gauge off. Turbos off.

Friday, October 06, 2017, 11:17: Venting.

Tuesday, October 10, 2017, 09:30:  Install/swap gas bottles. Elog.

Removed smallest Neon leak. Neon Bottle Serial #11231. Leak rate calibrated @ 1.59e-07 atm*CC/sec (02/09/2016)

In use:

Neon Bottle Serial #09572. Leak rate calibrated @ 1.82e-06 atm*CC/sec (02/09/2016)

Argon Bottle Serial #09937. Leak rate calibrated @ 1.35 x10-6 Atm-CC/sec (08/06/2003)

Tuesday, October 10, 2017, 10:12: Gas bottles opened. Pump not on? Vacuum spiked into e-04T. All closed. Await vacuum stabilization.

Tuesday, October 10, 2017, 10:36: Power on. Pump on Gas bottles opened. Await vacuum stabilization.

pump off.

Unable to hold Anode voltage after power supply change out.

Tuesday, October 10, 2017, 14:55: The Test Stand has been configured for Anode bias and the electrical connections have been wired according to ISK4523D REV 6.

At this current point in time John Chow has removed the power supply (PS). Will update once polarity is switched (if required) and is re-installed to the test stand.

Wednesday, October 11, 2017, 10:25: Polarity was switched  and PS is installed on the test stand. Sources/power switched on.

Monday, October 16, 2017, 11:45: Roughing.

Monday, October 16, 2017, 12:05: Turbo pumps started.

Monday, October 16, 2017, 12:10; Ion gauge on.

Tuesday, October 17, 2017, 10:43: Waterlines opened. RGA not on. Vacuum ok @ 1.53e-07T. Power/sources on.

Tuesday, October 17, 2017, 10:45: RGA on.

Tuesday, October 17, 2017, 10:50: BIAS / EZL / EE @ 30 / 13 / 1.5 kV .

Tuesday, October 17, 2017, 14:44: EE Current Stable.

Tuesday, October 17, 2017, 14:52: Power/sources off.

Tuesday, October 17, 2017, 14:54: Waterlines purged.

with Fernando

Tuesday, October 24, 2017: Testing setup with triple coil

Wednesday, October 25, 2017: Field mapping at 70 A and current/field measurements on triple coil.

The turbo pump will need replacement.