ITE water signal annual interlock check is done. Ed helped me on this check. Everything works normal.

Tm3 has been connected in ITE.  see attachment.

 F308 Inspection and service complete on #06, #08, #13, #15, #16, #19, #20, #21, #22.

All in good condition with new gasket material installed on #20.

Prepped for move to ISAC B3 for storage.

The ITW Faraday Cage has been cleaned, this is part of Winter Shut Down job happens in ISAC-1 Electric maintenance room annually.

The move is smooth and successful.

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

ISAC Storage Vault Door Re-alignment (April-May 2024) 

Issue

• Rollers gouging and marking on roller supports, testing shows door shifts at least 185 thou on structural beam when fully open vs. fully closed
• door misaligned: 1/4" laterally, slight rotation (~1/16" difference across closed door gap).

Repair

• Moved left structural beam (facing front of door) inward 1/4" at post.
• Loosened drive system to shift door over via crane to average laterally (1/8" shift) towards center,
• Attempted to fix door rotation with crane, door would not settle down perfectly flush, but got slight improvement 
• Adjusted limit switches for fully open and closed (due to the adjustments made previously, needed to realign limit switches) - adjusted flag for final close back by ~1/4"; adjusted limit switch at back of vault forward ~1/4" 

Verification 

• Unloaded vault door actuation tested multiple times with no issues, door returned to same position every cycle, no interferences during travel
• Vault Door actuation tested with trays 4 and 6 engaged, no issues
• All pails accessible when open
• Tested open and closed limit switches: the open limit switches are working properly; the closing soft and hard limit switches are slightly close together, causing the door to just "bump" the vault when closing, The scale of this is OK for current operation, will be adjusted when the ISAC Target Hall Controls Overhaul is done
• Tested and reset Emergency override mechanism - works properly

Outstanding Tasks

• Will paint marks on structural supports to track if problem reoccurs - update ELog when complete 

System State: Operational

See attached file for details

Broken TM2:TP2 has been replaced otday by a new TV-1001 nav pump supplied by vacuum group. replaced pump seris number:201281. new pump series number:IT23431008. TPs replacement history sheet will be updated by Frank. I will put comment on this e fault and let operator to close it.

 The Ta#66 target was repacked after the parasitic target was removed it was place in a new pail (#290) and place back in spot 5B of the vault. See attached PDF for further details.

ITW gas lines pumped down to 2e-3Torr on leak detector with leak rate in the low e-7 atm-cc/s. Gas bottles opened at 3psi and labels in epics changed to reflect correct setup. switch box set to cathode mode, checked that anode wire was at HV common.

note ballast is removed from ITW now to be used in ITE so that line is blanked off.

After new containment box installation on TM3, Chad and I did a helium spray leak check on two VCR fittings on front side water lines. they are leak free.

Helium pressurize window water line to 70 psi for 3minutes. No response on leak detector which is 0.0xe-9 atm.cc/sec.

TM3 with UCx#44 electrical check and leak check are good. see attachment.

HS line 70 psi helium pressure test at TCS: no leak at 0.0xe-9 torr.

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

Annual ITW water signal interlock check has been done. Renee helped me on it. Everything works fine.

Travis and I moved TM3 from TCS to SHC this afternoon. The move is smooth.

TM4 has been connected to ITW. see attachment.

A new SST gas line with swagelock tube fittings and VCR fit is using for ITW febiad gas staion in pit. Gas line is leak checked on bench. No leak . it is installed on TM4 in ITW now,

 David Wang made E/L checking before module moving to ITW. read attachment pls.

TM4 has been moved from SHC to ITW. Peter did the move. Travis helped on him.   The move is successful.

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