After Tm3 service tray and service cap installation, TM3 service cap air to vacuum seals leak check has been done at TCS. TCS:IG1 and IG1S are at low E-7 torr range.  leak detector base  0.0XE-9 atm.cc/sec,  base pressure0.0X E-4 torr.  I sprayed helium to all new air to vacuum seals on service cap. No leak on seals. The leak check has been repeated  2 times with same result.   

Monday and Tuesday, I started TCS water system and enabled the TCS chillers auto stage in/out. I saw chiller 2 in/out three times at 17C and 21.8C without issue.   TCS water system works fine. The test is finished.

TM3 has been moved  from SHC to TCS. The move is smooth.

TM3 module top helium spray leak test was done yesterday.  No leak on TM3 module top @ LD base leak rate 0.0 x E-9 atm.cc/sec.

TM3 helium pressure test and electrical check with new source tray at TCS were done yesterday. The results are excellent. See attachment

Saturday, April 27, 2024, 09:35 :

Started ramping up HV, EE and EL together. First small spark at 20.5kV on bias, no reaction in other devices.

Note both BIAS and EL are off in their readbacks. See table below

Saturday, April 27, 2024, 10:23 :

Spark on HV only at 25.5, couple sparks from here to 33, then at 33 starts real conditioning.

EL is reacting to some of the sparks, not sure if this is just electrical noise or not.

Saturday, April 27, 2024, 18:14 :

lots of trips above 60kV on the set pt. tripping off turbos and gauges. IG2 needed the controller reset.

RESULT: Got to 64.5 (actual) 62 (set point) with quite a bit of sparking over 60kV. Will go the rest of the way to 73 in the next days. Data dumped as isac/data/TM3_HVtests_Apr272024.dat

Sunday, April 28, 2024, 11:23 :

Ramped back up to 60kV reasonably easily, couple sparks and turbo trips.

Went up to 64kV (set point) with a lot of difficulty. Data dumped as isac/data/TM3_HVtests_Apr282024.dat

Monday, April 29, 2024, 14:58 :

Ramped up to set pt 62 easily, went down to 500V then 100V steps after that.

Went to set pt of 67 and left it there for ~40mins. Not perfectly stable but not too bad.

Tuesday, April 30, 2024, 17:12 :

After rebooting the TCS PLC to fix all the non-responsive devices, everything is working fine again.

Ramped easily to 60kV in 1kV steps.

Still got to 67 without too much trouble. Behaving pretty well...

At 70.2 (set pt, 71.3 readback) the water and vacuum gauge both tripped off and cannot be restarted. I am not sure what the real power supply reading is here but in the past it has been 70.5 set pt = 73 real value, which is as high as the power supply goes.

Stopping here since I'm not sure the water is circulating... the off pump says it is and the on pump says its not... left it at 70.2 for 40mins, still sparking going on (20:28 to 21:10)

Data dumped as isac/data/TM3_HVtests_Apr302024.dat

Sunday, May 05, 2024, 10:50 :

Containment box and target installed.

HV conditioning starting at 47kV.

Spark at 58kV knocked out IG1. Continuing with IG2 and IG1S.

Went up to set point of 63, readback 64. Will continue on Monday.

Data dumped: isac/data/TM3_HVtests_May52024.dat

Monday, May 06, 2024, 09:37 :

Ramping system back up.

First sparks at 50kv while raising the EL voltage (not sure if they are related).

AS: Voltage quickly up to 63 kV from 49 kV. Very smooth, no sparks or instabilities. Ramped at around 250 V steps every 10-20 seconds. First signs of instability at ~62.75 kV and definitely at 63 kV. I guess this is where it was conditioned to last. Let sit at 63 kV for a while while doing something else. It sparked once and turned off a turbo after half an hour. Starting ramping again.

AS: Spark at 65.75 kV killed IG1. Carla manually reset at 69 kV. Still working. A spark at 70.25 kV took out IG1 again.

AS: Maximum voltage reached at about 16:45. Setpoint 70.5 kV, readback 71.7 kV, PS itself ~73 kV. Carla reset IG1.

AS: 18:30, spent about 1.5 hours cumulatively at this maximum voltage. During this time it sparked about 15 times. Not long enough to tell if the spark frequency is decreasing. In the middle of this, Carla did something accidentally and caused the voltage to drop a bunch, so I manually set it to 0 V. She then reset TP1S, which was not staying on. Also, the EE and EL stayed at their respective voltages during this downtime (2 kV and 28.7 kV). I ramped the main BIAS voltage back up to the maximum voltage within 5 minutes and it was smooth all the way but sparked again at the maximum voltage. It seems conditioned up to or near the max voltage. Ramped down and turned off BIAS, EL, and EE.

AS: Dumped data to isac/data/TM3_HVtests_May62024_Alexander.dat

Tuesday, May 07, 2024, 10:02 :

Tested the EE - ramped up easily to 7kV, but then had issues maintaining the voltage. No vacuum response. Ramped down since we never use it that high anyway, though cable should be good for 10kV. More investigations later.

EDIT 2024-11-25, Alexander Shkuratoff:

Summary of StripTool data taken during this round of tests:

	TM3_HVtests_Apr272024.dat	2024-04-27 18:56	12M
	TM3_HVtests_Apr282024.dat	2024-04-28 13:16	1.4M
	TM3_HVtests_Apr302024.dat	2024-04-30 21:11	9.0M
	TM3_HVtests_May52024.dat	2024-05-05 13:06	5.0M
	TM3_HVtests_May62024_Alexander.dat	2024-05-06 18:45	9.5M

TM3 has been moved  from SHC to TCS by David and Frank. The move is smooth.

TCS was argon vented this morning between 7:00 to 8:30 am before module was moved to ITE.

TCS was argon vented this morning between 6:00 and 7:30am for TM4 moving to ITW.

TM2 was moved from silo to TCS yesterday morning. The move is smooth.    TCS vacuum system was started after. TCS and TM2 pumping down is ok so far.

refilled TCS:TK2 to 27.4 inches to compensate water lost during THC filters change.

TCS water system  five filters were changed yesterday by plant group Dan.T. Service labels on filters are updated.  No water leak after job.

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

  couple of E-8 to low E-7 atm.cc/sec leak were found on TM2 service cap top air to vacuum  o rings.  Replaced these leak o ring seals including o ring on IG1 and steerer service panel,o rings on MSP, EE, D blue nylon and copper feed through, and o ring on a round blank off beside MSP terminal on second row. 

2024-july-03 update: TM2 was leak checked again at TCS. no air to vacuum leak on module top. i helium pressure tested(60psi) all water cooling lines (except HS) . They are leak free.

Tm2 has been successfully moved from SW silo to TCS.

Tm2 has been moved from TCS to SW silo. the move is smooth.

TM4 has been moved from SHC to TCS. The move is successfully.

TM4 has been moved from SHC to TCS. The move is successful.

TM4 has been moved from SHC to TCS. The move is smooth.

TCS water system resistivity analyzer has been repaired. Two diodes and one capacitor on PS board were broken. They were replaced. Installed analyzer back and tested it in system. it works fine. Operator closed e-fault, removed force on TS5, and enabled alarm on TS5 and TC1.