TM3 has been moved from ITW to S-W silo. The move is smooth.

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

 TM4 with target TiC#9 is connected in ITW. See attachment.

vacuum leak check on TM4 service cap in ITW was done this morning.   leak detector leak rate 0.0XE-9 atm.cc/sec. No leak on TM4 service cap module top.

 TM4 with spent target TiC#9 was disconnected in 29-10-2024 and it is being moved from ITW to SHC.

 TM4 with new target UCx#46 was moved from TCS to ITW and has been re-connected right after. see attachment pls.

ITW primary and secondary vacuum vessel leak check for  2025 shut down has been done. Also,TM4 internal water line helium pressure test has been finished.  Both results are normal. There are two small old leak on EXit 1 and Exit2 module top plate  o-ring under 1Xe-8 atm.cc/sec which we knoew in past years test. resin spray on leak  area reduce the leak ratee below 5Xe-9 atm.cc/sec. No concern on these small leak.   See attachment  for detail results.

 TM4 WITH UCx#46 was disconnected in 2025-01-02 in ITW. Forms attached.

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

Chole and I finished ITW water signals interlock. No issue.

To prevent TP bearings seize during shut down, ITW:TP3,TP4, TP1S TP4S have been started since March 06th. They work fine.  The plan is to switch them off this Thursday, and restart them in May before ITW in use.

 5 shielding blocks have been moved from ITW to ITE, MAA area has been secured.

 5 shielding blocks have been transferred from ITE to ITW. MAA is secured again after moving.

TM#4 with UC#14 has been moved from the conditioning station to the east target station.

Two of resin tank filter cartridges(supply and return) are changed today. Old cartridges and bagged and tagged. The contact field on them are 650usv/hr. The new cartridges are fiber-glass, Triumf store item. After replacement, the field on contact with the filter case are about 10 usv/hr. But the field on contact with top resin tank  has been increased from 45usv/hr  to 225 usv/hr

 The flow rate is relatively stable before and after change. See attachment

The high active water resistivity took a long time to recover after the upgrade to the water cooling circuit. The system needed about a month (from end February to end March) to recover to nominal values. See attached plot of archiver data.

TM1 has now been connected in ITW and the water resistivity remains > 8 MOhm cm, which should allow normal operation. However, the resin is suspected to be approaching end of life. Work is ongoing to get a new replacement resin tank.

High active water system  was  checked before restart. A small water leak on resin can supply valve was found. It is fixed. MP1 and MP2 were started and checked separately. System pressure and flow rate are normal.MP1 is in operation now. 

The old resin tank has been stored in silo since last year March.  Without crane the tank up, We use the pole monitor measured the field around the bottom of the tank in silo. The average contact field on the bottom is about 4.0msv/hr. @0.5meter , the field is about  900usv/hr. It is still too hot to remove it.

HALCW resin can flow meter replacement is done. Less that 100 mL water was drained to a small tray during the job. RPG checked the water. Less than 20 counts. Water are dumped the high active sump.   The HALCW MP1 is started. No leak on new gauges and fittings. Old gauge is labeled , bagged, and stored in TH.

Frank and I did the test.  The emergency exit hatch on roof was opened and closed twice. Everything works fine.