Tuesday, May 14, 2024, 10:26 :

Ramping up bias/EE/EL on ITE - will see if the HV cage in the pit can hold 60kV or not.

At around 50kV the bias read current starts to get jumpy. Doesn't look like its an issue for the voltage, but definitely instability increases.

Occasional sparks seem to increase the EL current significantly...

David heard some sparks in the target hall. Looks like from heat shield feed through to the top of the cage. Several sparks heard in the TH also changed the einzel lens draw current significantly. These feethroughs are not far from each other so could be related.

Apparently the sparking also tripped off all the optics and heaters in ITW, by changing the state of the water flow interlock. Interesting and not seen ever before. Will test again with the cage off, rather than risk tripping ITW again.

Tried ramping up the voltage on just the EE. Seems the limit is 7kV - at that level it gets sparky and unstable. Should be investigated (should hold 10kV) but not critical for module function.

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.