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,

TM4 has been connected to ITW. see attachment.

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

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.

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

Tm4 has been disconnected in ITW per document 141576. Checklist is done.  HS line is purged.

Tm4 has been moved from ITW to SHC. the move is smooth.

Tm4 has been moved from TCS to ITW.  the move is smooth.

 TM4 with new target UCx#45 was connected in ITW this morning. pls see attachment uploaded with.

 5 shielding blocks have been transferred from ITE to ITW. 

Doc # 181007

ITW has been behaving badly at higher voltages recently, even without protons on. I conditioned it up to 50kV with heaters off in the TCS and it was fine. But when I tried to do the same with heaters on in the station, it was quite sparky and it kept tripping the TGHT/TBHT. I went to 49kV where it was unstable, then lowered to 48kV where it looked fine for 30mins. But even operating at 40kV, it tripped the heaters several times. The TBHT voltage came back lower than before on the last trip, so I am getting worried about it.

I decided to make sure all the electronic spark protection was ok in the faraday cage. There is a resistor/gmov combination across the terminals of each TGHT/TBHT in which Tomislav replaced the gmovs for me because his tester did not work at those low voltages, so we couldnt see if they were broken. The electronics diagram called for 18V gmovs, the replacements are 22V because that's all we have.

We also tested and re-installed the capacitor-gdt-resistor combinations that John installed last year from TGHT/TBHT bubars to HV common. I originally removed them because we couldn't bias a FEBIAD with them on - this still has to be investigated. The measured values are 0.148uF, 90kOhms and a breakdown voltage on the gdt of 410-450V.

Hopefully this prevents sparking the power supplies off.

Sunday, June 16, 2024, 07:03 : power supplies have not tripped off since electronics repair. See data/TM4sparkingbehaviour_June152024.dat for sparking frequency over ~10hrs of protons (5-14uA). >14 sparks during this time (14 captured by PLC when voltage dropped, many more current peaks).

TM4 with spent target UCx#45 was disconnected in ITW and moved to SHC.

 TM4 move from ITW to SHC is smooth.

TM4 has been moved from TCS to ITW.  the move is smooth.

TM4 has been moved from TCS to ITW.  the move is smooth.

 TM4 with TiC#7 was connected in ITW, all TPs are running at full speed.

 TM4 with spent target TiC#7 (dead) was disconnected in ITW and ready to move to TCS.

Tm4 has been moved from ITW to SMP. the move is successful.

With TiC # 8 installed, TM3 has been moved from SHc to ITW. The move is smooth.

TM3 has been connected in ITW. See attachment for checklist.

 TM3 is disconnected and all water lines are purged/refilled with 50psi Nitrogen. Pls see pics attached with.