David Wang wrote:

Helium pressure test on TM2 all water circuits is done. 70 psi helium , 10 minutes test time. Leak detector :base leak rate 0.0XE-9 atm.cc/sec, base pressure 0.0Xe-4torr. No any response on LD during the test. All TM2 water circuit are leak free.

 Thursday, March 28, 2019, 12:40: Found valve to expansion tank TCS:TK2 to be closed. Opened valve. This allow air to escape out of the system and the water system is running as expected again

Friday, March 29, 2019, 11:15: Changed EE to conditioning mode

Friday, March 29, 2019, 11:35: BIAS / EZL 20 / 10 kV

Friday, March 29, 2019, 13:47: BIAS / EZL: 25 / 12.5 kV

Friday, March 29, 2019, 16:09: BIAS / EZL: 30  / 15 kV

Friday, March 29, 2019, 17:23: No sparks for >60 min

Friday, March 29, 2019, 17:26: BIAS / EZL off

Monday, April 01, 2019, 08:13: BIAS / EZL: 30  / 15 kV

Monday, April 01, 2019, 08:33 BIAS / EZL: 35  / 17.5 kV

Monday, April 01, 2019, 09:00: Sparking at about 37.5 kV BIAS. Lowered below 20 kV to stop. Now sparking at around 20 kV

Monday, April 01, 2019, 10:00: BIAS/EZL 22 / 20 kV. Occasional sparking on BIAS as voltage is increased.

Monday, April 01, 2019, 10:05: Change of strategy. Will heat target to bake out the vacuum before continuing with HV conditioning.

Monday, April 01, 2019, 10:43:

BIAS / EZL / EE: 15 / 7.5 / 1.5 kV
COIL / ANODE: 10 A / 200 V
Ramping TGHT / TBHT at 1 A/min. Good/bad vacuum (IG2): 1E-6 / 2E-6 Torr

Monday, April 01, 2019, 19:16: TGHT / TBHT: 500 / 270 A. Vacuum increasing. IG1/2 1.2E-7 / 1.4E-6 Torr

Monday, April 08, 2019, 09:28: BIAS / EZL: 20 / 10 kV (some periods of multiple sparks)

Monday, April 08, 2019, 10:28: BIAS / EZL: 30 / 15 kV (some periods of multiple sparks)

Monday, April 08, 2019, 11:24: 3 sparks for the last 60 min

Monday, April 08, 2019, 14:43: BIAS / EZ: 40 / 20 kV (after two periods of sparking around 39 kV requiring voltage to be reduced below 30 kV to recover)

Monday, April 08, 2019, 15:57: Two sparks in 70 min

Tuesday, April 09, 2019, 12:40: BIAS / EZL 40 / 20 kV with >90 min without sparking

Tuesday, April 09, 2019, 16:00: BIAS / EZL 48 / 24 kV

Tuesday, April 09, 2019, 16:07: Sparking tripped TPs and IG1S, then power supplies.

Tuesday, April 16, 2019, 16:41: BIAS / EZL 50 / 25 kV for 1 hour without sparking.

Wednesday, April 17, 2019, 15:23 : Continued without problems to 50 kV earlier, but sparks tripped off vacuum just above 50kV. Continue later.

TM2 new source tray has been remotely transferred into SHC successfully. The transfer table has been moved back to TH within 1 hour.  I swiped the table and found about 150counts contamination. It is much better comparing to last time using since we removed this table out of SHC as quick as we can. The table will be cleaned with windex  after Target Hall is surveyed.

 TM2 was moved by myself and David from the SHC to the TCS. Move went well. Curiously the fields on the module were measured higher than the previous measurement (now ~5.8mSv/hour) .

TM2 has been moved from TCS to SHC. The move is smooth.

TM2 was remotely moved from the South Hot Cell to SW Silo. Reading at SHC = 89.8 mSv/h. The move was smooth.

TM2 was moved from ITE to SHC with Ta#68 target. During the move, a railing was lightly bumped by the corner of the module - no obvious damage or issues have been observed. Otherwise, the move was smooth.

I leak checked TM2 at conditioning station this morning. All air to vacuum seals on the top of the module are good. All water lines are pressured with 60 psi helium for minutes each. One of the tube heater + water line( 2lines for tube heater + for supply and return) has a huge response on 60 psi helium pressurizing. The leak rate went from 6.0xE-9atm.cc/sec to maximum leak rate in 5 seconds and I saw a pressure increasing either. when I pressurize the other side tube heater + line ,the leak detector also had a response,but it is slower than first side .Since the top of the water adaptor isn't sealed , so I think the leak should be in one line only. All other water lines are leak tight since I didnt see any obvious response on leak detector at 5 to 6x E-9 atm.cc/sec which is very low on leak rate. 

The following water circuits in TM2 are connected at TCS and running with water now : target oven+ - ( one circuit), tube heater+ -( one circuit), coil1 and 2(one circuit), MSP, and EE. The HS and window are open circuits now so they can not be supplied with water.  During the check before we knew HS and window circuit were close to perfectly sealed. So, The test result should not be affected without them

The TCS water pumps are started at 8:28 AM. All TCS high vacuum gauge readings are getting slight better after that.

Anders and I finished the most part of TM2 water lines helium pressure test yesterday.I list the system parameters and test result as below:

TCS  IG1: 9.8XE-8 torr,  TCS IG2: 9.6Xe-7 torr, TCS IG1S: 3.5XE-9 torr, TCS CG1A: 10 m torr

Helium pressure: 70 psi. Test time: 5 minutes for each individual circuit.  1 hour for all  lines together test.

 Leak detector base leak rate:0.0 X E -9 atm.cc/sec, base pressure 0.0X E-4 torr. LD was always restored or closely restored to the bottom  scale after each individual test.

The HS and Window lines will be tested later with new target installed and  window line gaskets restored.

Leak checked TM2 service cap at TCS. helium pressure checked containment box window and HS cooling lines.  No leak on service cap and waterlines.

TCS: TP1, TP2 and TP1S are started.

TM2 is moved from TCS to silo this morning. The move is smooth.

Argon venting is done.

All turbo pumps are started. Water system and water signals have been checked. Pumping down on ITW and TM2 is good so far.

Helium pressure leak check on TM2 HS line at TCS is done. No leak. Also, Helium are sprayed to gas line adapter and fittings. No leak. TM2 is connected at TCS. Anode plug on TCS is connected to module 52pin connector. Water system is started. Vacuum pumping down is good. HV cover will be installed today.

Bill and I mover TM2 from SHC to CS. The move is smooth. I connected the CS vacuum system after the move, and started the roughing.

I connected TCS vacuum system to TM2. The station is under roughing now. All turbo pumps will be started soon.

Remotely removed TM2 from S-W silo to SHC . Peter and I did the move. It is successful.

TM2 has been moved from TCS to west-south silo. Travis and I did the job. The move is successful.

The move is successful.