Pumped down the gas lines in ITE on Tuesday Nov. 28 2023 and opened the CF4 bottle valves. Missed the small section between the regulator and SV2 though, so will probably redo it.

Pumped down again on Dec. 12 2023. Was taking a long time so might not be as good as earlier. Maybe there is a leak in there...

Pail 211 which contained Ta#58 spent target was repackaged into Pail 286 in the South Hot Cell.

The dose rate at approx. 1 m was 4.16 mSv/h.

Pail 286 was transferred to the mini-storage vault and placed in the outermost location. The mini-storage vault is full at this time, in preparation for the next shipment.

 The spent Ta#66 was moved from the south hot cell to the spent target vault, it was placed in pail#285 and placed in spot 5B of the vault. The target was 46.2mSv/hr when removed from the south hot cell. See the attached PDF for vault details.

ITW entrance module has been disconnected per document190510. It will be moved to SHC for diagnostic group tomorrow.

ITW entrance module has been moved from ITW to SHC. The move is smooth.  I cleaned entrance module tank flange and o r-ing slot.  entrance module tank flange o ring  is replaced .

On Jan. 9 we did the PIE on Ta#66. Opened the heat shield and removed the EE. The inside of the heat shield was very black with lots of flakes falling off. The target itself looked overheated, and the container looked pretty bad for a Ta target. The outside of the EE looked perfect but after removing it there was a lot of black stuff on the side and we saw that the Re foil was curled up. Jens said during the runtime that he saw something that looked like a wire in the beam path, so maybe this was it.

ITW entrance module has been moved from SHC to ITW. A slightly bump on module shielding block bottom side corner to tank vessel side when lowed module into tank. No big concern on this slight  bumping. Otherwise the move is perfect.

Entrance module has been connected in ITW pit per document 190510 " entrance module disconnection and removal procedure".

Tom Kauss finished TH crane annual inspection yesterday. The crane woks fine. Tom has this inspection record in his file. The crane inspection tag has been issued for 2024.

Tom Gauss inspected  two target module lifting frames ITA0494-1997-01 and ITA0494-1997-02 yesterday. He certified the use of these two frames for 2024. Inspection tags have been issued and attached to frames. He has inspection record on them. 

Tom Kauss inspected target hall crane below hook attachment pins and plates ITA6550-01 yesterday. He certified the use of these pins and plates for year 2024. The inspection of these pins and plates was in Target hall crane annual check list. It was issued as a calibration index by Isaac Earle in 2022-Feb-08.  After inspection, The inspection tag  was issued and attached to pin. Tom has an inspection record on this job.

ITW exit 1 module was disconnected  for Exit module flange o -ring replacement yesterday. After oring replacement, the module has been reconnected.

ITW exit 1 module tank flange o ring has been replaced. the old o r-ing was completely flat in slot without elastic property.  tank flange, module flange, and o ring slot were clean by acetone and canister vacuumed. Raised up module 3 feet and pulled new o-ring over module top so new o ring could be  installed without moving module out. after new o ring installation, craned down module to flange and raised up module 2 feet again to confirm the o ring is properly sit in slot.

Today (2024-02-09), five flasks were loaded in preparation for shipment with the following targets: SiC#41, SiC#42, Nb#9, UC#36, Ta#58.

Note: prior to shipping, the pails within these flasks will need to have a crimped lifting loop added to them.

The mini-storage vault is now EMPTY.

The target index spreadsheet has been updated.

ITW was set up for HV testing - water is running and at a high resistivity due to injected N. Einzel lens is attached to ground. Everything else is as normal. The module plug is in so no vacuum bypasses were needed. Very easy to ramp to 60kV. Sat at 60 for about 1.5hrs with maybe 1 spark (hard to say from the strip tool data). Current draw was about 176uA. Data dumped as isac/data/ITW_HVtesting_shutdown2024

Spent target UCx#43 (pail 289) was moved from the South Hot Cell to the Storage Vault, placed in location 2A. Dose rate at 1m was approximately 22.6 mSv/hr.

Target index spreadsheet updated, attached.

In preparation for F-308 loading, three pails were moved from the main storage vault to the mini storage vault. The following pails were moved:

• Pail 270 (C#3)
• Pail 276 (UC#39)
• Pail 231 (UC#41)

Target Index spreadsheet updated, attached.

 ITW entrance module and exit 1 module leak check on module service cap/top air to vacuum seals and module to tank flange  o-rings have been done. all seals and o rings are leak free to 0.0 xE-9atm.cc/sec except one leak ( to low E-6 atm.cc/sec) on ITW RV4 KF50 o-ring was found. It caused by a cross o ring surface scratch on KF 50 flange. the scratch was sanded and polished out. on second time leak check, it is leak free.

ITE was set up for HV tests - this time the module plug was not in so the BIAS and EE had to be bypassed. NOTE: ITE:BIASPLC must also be bypassed for this to work. Currently it is located on the vacuum bypasses page, but may be changed to the optics page soon.

ITE was ramped to 60kV in steps of 1kV easily. It sat at 60 for about 1.5 hours with a current draw around 173uA. It was not entirely stable though, and appears to have sparked many times. None of them seemed very large, but hard to tell.

When ramping down, current dropped quickly with the first couple steps. Data saved as isac/data/ITE_HVtesting_shutdown2024