ITW is argon venting now.

Argon venting of ITW is done. It took about 4.0 to 4.5 hours to vent the ITW with 2-3 psi argon. The CG4 and CG4S showed 35 to 36 torr on epic page when mechanical gauge is 760torr in electrical. Argon gas bottle is closed in electrical room.

 I replaced ITW TP4S today as we scheduled. The working area is swiped and air sampled .Everything is fine.

The Series # of the old pump is 200927, and the new one is 600080. The E-fault 6081 which is related to the job will be closed.

ITW TP1 can not be started yesterday. Also, TP1S was difficult to start , and had a high current draw after.  We changed both of them in pit today. TP1 and TP1S are started successfully after replacement.

ITW RV4S (A and B) are leak checked. They are good. 

  Carla did the test. and reported the result as following: HV testing of ITW is complete. It was pretty well behaved up to 59.5kV, and sat at 59kV for 30mins with no sparks (that EPICS caught). There was some strange behaviour of the current between 51kV and 53kV - it was jumping by 20uA or more - but there didn't seem to be any voltage response, and it went away after 53kV (though it returned on the way back down). The test was done in Feb 02.

Tuesday, February 04, 2025, 10:15

• Started voltage ramp up. Using 250 V increments.

 Tuesday, February 04, 2025, 12:07

• Current has got a bit noisy, starting at around 56.5 kV.
• Currently at 57 kV. Voltage is stable though.
  • Current is about 151 uA on average, with spikes up to 164 uA.
• Held at 57 kV for about 5 minutes, no drops in voltage, so continuing ramp.
• 57.25 kV
  • There is noise in the current each time the voltage is increased. It seems to calm down slowly, with the later noise/spikes being less frequent and lower magnitude.
  • Average current is about 151 uA. Spikes at the start were as high as 169 uA, and after about 8 minutes they are about 160 uA.
  • Held here for about 10 minutes before continuing ramp.
• I will try to get to 58 kV, and then back down to 57 kV to see if the current calms down and there is some sort of conditioning effect. If there is, I'm not sure of the mechanism since nothing is in vacuum.

Tuesday, February 04, 2025, 12:51

• Dropping down to 57 kV, the current was about 150 uA and there were no more noise spikes. Seems like conditioning. Going back to 58 kV and continuing ramp.

Tuesday, February 04, 2025, 13:09

• At 60 kV. Average current is about 187 uA initially, which could just be the average of the noise. It looks like it's dropping a few minutes later. About 10 minutes later, the current is 184 uA. 181 uA after 20 minutes.
• It's been stable for about 30 minutes now. No voltage fluctuations, noise in the current has been the same or decreasing.
• Current is about 177 uA after 80 minutes.

Tuesday, February 04, 2025, 14:36

• It's been 1.5 hours and the voltage has been stable the whole time. All is good. Ramping down.

Tuesday, February 04, 2025, 14:50

• Power supply off
• Data dumped to http://isacwserv.triumf.ca/onlylocal/isacdata/ITW_HV_test_shutdown2025.txt

Leaking seals on ITW HALCW 2" return line ball valve have been replaced. 8 liter waters are drained out for this job. Water are drained into a thick plastic bag.  The bag is tie strapped , labeled, and put into a yellow garbage bin in MAA. Water sample is given to RPG. After analyzing, RPG will give instruction on how to deal with it. Since we just refilled NALCW to system before this job, the active level on sample is very low. We may dump them into active sump.  After seals change, The system is refilled . I started pump and set everything back to normal configuration. NO leak has been found on new seals. The HALCW system is operating good so far.

ITW Entrance Module was moved from west station to South Hot Cell.

I leak checked new installed ITW EXIT1 tank to module o-ring.No leak had been found . Also ,TM1 primary vessel air to vacuum seals had been checked at the same time. There was no response had been found on leak detector.

 TM4 has been moved to ITE and connected there today. I started six turbo pumps this afternoon. One of TP4 back valve (one in pairs) didn’t open .It caused the TP4 difficult to start. I disconnected that control cable that plug to solenoid valve and reconnected it. Then it works fine. After this, TP4 started to normal speed easily. The vacuum readings are OK so far. Tomorrow morning they all should be around 6-7 X E-6 torr range. Water interlock checks related to TM4 have been finished. NO water supply to ITE dump and entrance to keep the system pressure over 90psi. All TM4 water signals are good and strong by watching them from electrical panel. Gas line connected and valves opened. Control page set to fibiad .

TM4 had been connected in ITE. Six turbo pump had been started . thepumpming diwn is very good so far. The water interlock check on ITE and TM4 had been finished and everything is good.All water signals are strong and constant by visually checking.

ITH:MP1S pump inside lubricant was changed today. old lubricant is dirty with dark color. they are stored in sealed waste oil jug and stored in silo area. Pump has been installed back and started. It works fine.

ITH:MP1 is replaced this morning due to its poor performance started yesterday afternoon. The general field in pit is about 260usv/hr. the contact field on pump is 2.0 msv/hr. New pump works good. Lubricant in pump will be drained next week. then motor will be removed. The pump body will be bagged and stored in silo area.

ITH:MP1 is deteriorating by watching on ITH:CG1 and CG2 readings and investigation in pit. A fault 17644 has been issued. this pump will be replaced in March when general fielding in vacuum pit is reasonable for the job.

ITH:MP1 inlet pressure showed 10torr after power outage during holiday. All ITE/W turbo-pumps were tripped because of it. Removed one shielding block above the vacuum station. Visually checked oil level  and condition in pump. oil level is high. oil color is dark. no oil  leak .  Installed a local convectron gauge on pump inlet. After pumping down, It shows pump is good.  Tightened  all KF 25 and 50 clamps on pump inlet side. Reconnected pump to system. Everything works fine so far. All ITW / E turbo pumps are started now.

ITH: MP1 has been replaced due to its poor performance.  Its motor and power cable are taken out and reused on new pump. Vacuum group assembled them together, and installed the new pump. The new pump works fine.

Edi calibrated ITH:CM6, CM6S and ITM:CM3. By the same time,  ITH:MP1 and MP2  lubricate oil level are checked. Everything looks fine. No oil  leak on both pumps. 

ITH MP1 is replaced today with a new style pump.The new pump is 0.75 inch higher than  old pump on inlet and exhaust so a new solid inlet adapter  (KF50-25) has to been used. For future secondary pump ITH MP1S replacement, we need a new adapter 0.75 inches shorter as well.   The new pumps is started . Everything works fine. Old pumps is drained , bagged, and stored in TH B2 level. All radioactive garbage produced during the job are bagged , tagged, and stored in TH as well.