October 1, 2024 - Aaron Tam 

Ta#67 LP-SIS removed from TM2

Ta#67 is sitting in SHC awaiting PIE 

TM2 Containment Box Cover has not been reinstalled 

Photos of target removal and module attached 

October 7, 2024 - Aaron Tam 

Ta#68 HP-SIS checks performed at B1 lab, moved to anteroom, and inserted into SHC via tool port w/ Aaron Schmidt. 

Ta#68 fixed to source tray with 4 mounting bolts in order of: Right manip. holding, Top left, Right manip. removed, Bottom right, Top right, bottom left. w/ Aaron Schmidt and Brady Borrmann

• Motion was smooth, no resistance when positioning onto pins

VCR fittings done up with ample force, leak check passed

Conductor bolts installed in order of: 2 Target electrode conductors (Checked washers), 3 target Inner and outer conductors.

All bolts checked for full contact with mirror and binos. 

Electrical check failed: Dead short (look for David's ELOG for more detail when available) 

Troubleshooting while David is checking resistance: w/ Ferran

• Intermittent success with heavy manipulation of water lines
  • Loosening off Waterline bracket-to-source-tray 
  • Loosening off Bracket to water line bolts 5/32 hex's 
  • Rotating bracket towards operator (effectively raising waterlines in the back upwards) seems to yield more intermittent success, but never passing megger @ 250V 
  • Tube was inadvertently dented when handling the tube in a wrenching motion with manip tong. counterclockwise
• Target removed while David is still on the multimeter (calling for any sign of success)
  • Starting to remove Target in order of: Tightening back waterline-to-bracket 5/32 hex screws, loosening off waterline bracket, loosening off VCR nuts, 2 Target electrode conductor bolts, 3 Target inner and outer conductor bolts, Fixing bolts Top left (dropped below source tray), Bottom right...
    • (At this time David called with some success with electrical check)
  • Reversing course to verify fault has passed, target was reassembled, only finger loose on the VCR nuts.
  • Faults no longer present
  • Target removed
    •  As target was being pulled off source tray locating pins, a piece of ceramic fell onto the source tray just behind window waterlines.

Target taken out of Hotcell by Ferran. New VCR gaskets installed. Target reinserted 

Target installed no issues. Used fixing bolt used to replace dropped one. 

Leak check passed, Electrical check passed

• Notably don't have a photo of reinstalled target or source tray before 2nd install attempt. 

Containment cover reinstalled 

Ceramic piece moved into Pail #285 (suspect this is a very hot piece)

TM2 ready for move to ITE

ABCD was dead shorted to 60kv bias during the first time measurement after target installation. Target was removed and reinstalled again with new VCR seals by Ferran.  during target removal process, short disappeared when Aaron remove bolts on CD tube heaters terminal.  leak check and electrical check result are good after second time target installation. 

Tm2 has been moved form SHC to ITE. The move is smooth.

 TM2 with new target Ta#68 installed is connected in ITE. Pls see form attached.

 Post Irradiation Examination

October 9, 2024 - Aaron Tam w/ Chad Fisher, Aurelia Laxdal, and Lucas Backes 

PIE conducted by Chad with direction from Aurelia. Aaron and Lucas observing/documenting 

Goal: Thin foil target material is somewhat novel, and we should characterize the differences if there are any. 

Photos of the pre-examined target can be seen on ELOG 2697  on Tuesday October 1, 2024, when the target was removed from TM2

Notes:

• Right most inner/outer target conductor bolts was sitting proud and had threads showing, photo attached
• Some Black deposit was found on the inside of the heatshield directly below the extraction tube, and loose in powder form inside the heatshield. 
• Target tube seems to have more of a crystalline texture than previous examinations.
• When Target tube was being removed, one of the target electrode conductors broke off
• some dimple texture was found on the target tube windows and this was further explored by prying a channel through the length of one side of the tube to get a better look

Target pieces were placed loosely back within the heatshield, and the lid loosely placed back on.

Awaiting pail loading, and move to storage vault

TM2 with spent target TA#68 was disconnected  in ITE and is being moved to SHC. All water lines are purged for module storage.

TM2 was moved from ITE to SHC with Ta#68 target. During the move, a railing was lightly bumped by the corner of the module - no obvious damage or issues have been observed. Otherwise, the move was smooth.

TM3 was moved with UCx#47 from TCS to ITE. The move was smooth.

  Note: Ta#68 had a difficult install. See E-log ID# 2698 for more info 

First look:

• Containment box cover looks the same as previous (See:ID: 2697)
• Target shows large amount of soot-like deposits (See photos for locations)
• Deposits seem to have been left on parts of the service tray as well ie.: Multipin connector 

Removal:

• Removal was smooth
• Water-line bracket fixing bolts seemed loose even before I put a tool to them 

Eyes of sides:

• Better photos of where deposits are 
• Everything else seems normal 

all water lines on TM2 have been purged. Refilled them(except HS ) with 60psi nitrogen for module silo storage before next year using. 

TM2 was remotely moved from the South Hot Cell to SW Silo. Reading at SHC = 89.8 mSv/h. The move was smooth.

Friday June 24 2011

The target module has been moved to the Conditioning Station (CS)

Pumping overnight

Saturday June 25 2011

Pressure Service Cap (SC) 3E-6 T

Pressure Containment Box (CB) 6.6E-6 T

High voltage test to 40 kV, unfortunately, the pressure is not great so we stop at 40 kV

Pressure at the end of the day: 1650H was, P SC 2.6E-6T

P CB 6.6E-6 T

Sunday June 26 2011

Pressure P SC 1.6E-6T

P CB 6.6E-6 T

It seems we have a leak. The pressure does not drop in the CB over one day.

Today June 27 2011

 Pressure P SC 1.2E-6T

P CB 6.6E-6 T

We leak check the target module and found two leaks, one on the ground electrode and one on the mounting plate cooling circuit.

This is a new one. We had test this line three times before and it was ok.

Action for tomorrow.

After CS vent, 

Move TM1 to SHC

Survey 

Connect LD to Mounting plate cooling circuit

Open Side panel and leak check.

Meeting at 0830H

Over the period of July 20-21st TM1 had several repairs completed and tested. The easiest of the repairs was the installation of a gasket and a blank off. The next repair was to replace the 2 oring on the side panels that were removed for inspection and repair. The instrument panel oring was replaced again and the previous one measured. Both were found to have the correct diameter of 0.131 inches for the seal groove. When attempting to cut the thermocouple line back to an acceptable distance it detached from the stainless tube running down the high voltage chase. It was discovered that it was only being held in place with heat shrink and that the bend consisted of a hand made copper tube that was flared slightly, a truly poor electrical and mechanical connection. Also discovered was the thermocouple wire was left in the tube, this too was removed. The stainless steel tube was then secured to the tube heater (C) lines with a PEEK tie wrap. The port where the thermocouple line was then blanked off. The extraction electrode and mounting plate feed through stem repair went as practiced and no unexpected events occurred. One thing of note is that because the lines are twisted and some of the tube was removed the quick connects are no longer facing the same direction they were before. During these repairs the Ion gauge screen contacted a filament and caused a fault, this was repaired by edi who rotated the gauge. Roughing was started at ~10 am on July 21st and the turbo pumps turned on at 10:45.  At 13:20 all of the lines and external seals were tested and no leaks were found. The module was at a pressure of 2.9 x 10^-5 Torr (IMG) and 1.4 x 10^-5 Torr (ION). The leak test cart was at a pressure of ~2.7 x 10^-2 Torr and a leak rate of 1.1 x 10^-2 atm cc/sec for the external leak test and the repaired lines. A small response was found in the Tube heater (D) where the leak increased to 2.1 x 10^-8 atm cc/sec. The leak test cart would then no longer drop below 1.9 x 10^-8 atm cc/sec and there was no response measured for lines C, B, and A. Over all very positive results! After 6 hours of pumping down the pressures were 2.0 X 10^-5 Torr (IMG) and 9.7 x 10^-6 Torr (Ion).  

Bevan Moss wrote:

Over the period of July 20-21st TM1 had several repairs completed and tested. The easiest of the repairs was the installation of a gasket and a blank off. The next repair was to replace the 2 oring on the side panels that were removed for inspection and repair. The instrument panel oring was replaced again and the previous one measured. Both were found to have the correct diameter of 0.131 inches for the seal groove. When attempting to cut the thermocouple line back to an acceptable distance it detached from the stainless tube running down the high voltage chase. It was discovered that it was only being held in place with heat shrink and that the bend consisted of a hand made copper tube that was flared slightly, a truly poor electrical and mechanical connection. Also discovered was the thermocouple wire was left in the tube, this too was removed. The stainless steel tube was then secured to the tube heater (C) lines with a PEEK tie wrap. The port where the thermocouple line was then blanked off. The extraction electrode and mounting plate feed through stem repair went as practiced and no unexpected events occurred. One thing of note is that because the lines are twisted and some of the tube was removed the quick connects are no longer facing the same direction they were before. During these repairs the Ion gauge screen contacted a filament and caused a fault, this was repaired by edi who rotated the gauge. Roughing was started at ~10 am on July 21st and the turbo pumps turned on at 10:45.  At 13:20 all of the lines and external seals were tested and no leaks were found. The module was at a pressure of 2.9 x 10^-5 Torr (IMG) and 1.4 x 10^-5 Torr (ION). The leak test cart was at a pressure of ~2.7 x 10^-2 Torr and a leak rate of 1.1 x 10^-2 atm cc/sec for the external leak test and the repaired lines. A small response was found in the Tube heater (D) where the leak increased to 2.1 x 10^-8 atm cc/sec. The leak test cart would then no longer drop below 1.9 x 10^-8 atm cc/sec and there was no response measured for lines C, B, and A. Over all very positive results! After 6 hours of pumping down the pressures were 2.0 X 10^-5 Torr (IMG) and 9.7 x 10^-6 Torr (Ion).

 I again checked the TM this morning (July 22) at 10:00 am (24 hours of pumping), There is no external leaks carts pressure was 0.0x10^-4 Torr and leak rate was 0.0X10^-9 atm cc/sec. The IMG gauge was reading 6.8 x 10^-6 Torr and ION gauge was reading 3.1 x 10^-6 Torr. The lowest we have yet to record on the IMG gauge was 6.6 x10^-6 Torr and that was when the ION gauge was reading 1.2 x 10^-6 Torr and there were several leaks. This is a very good sign. I will continue to check the vacuum throughout the day. 

One more thing of note is that the copper feed thru stems have a design flaw, the holes for the locating pins are too large. As such a custom step pin had to be made. It work functionally the same but is not as intended.

TM#1 has been moved from the Conditioning Station to the South Hot Cell for the installation of Ta#37.

TM#1 has passed the the electrical check.

Tm#1 with Ta#37 moved from the south hot cell to the conditioning station. Move went well.

 TM1 has received the Ta#37-LP and has been pumping since thursday. This morning the pressure gauges read, IMG1: 1.6x10^-6 T and IG1: 7.4x10^-7 T.

The high voltage power supply has been connected to all high voltage feedthroughs and the voltage raise to 42 kV. 

High voltage conditioning started around 20 kV and after few minutes we were able to go up to 40 kV. 

The pressure increases on both locations, IG1 went up to 8.1x10^-7T and IMG1 went up to 1.8x10^-6T.

The module is good to go. 

TM#1 with Ta#37 has been moved from the conditioning station to the the west target station, move went well.