Chad, Anders and Alex inspected the target this morning. The target had no significant visible damage to the container. Some material was deposited on the Extraction Electrode.

Phots on DocuShare

Nb#6 has been inserted into the south hot cell in preparation for ionstallation onto TM1. During the pre-insertion inspection I noticed that I could see the foil installed into the ionizer tube and that in did not seem to be seated or concentric to the tube itself. I had Anders and Friedhelm check this and they deemed that it was ok.

Ta#38 has been placed into the south hot cell. Swipes of the tool port were taken there was a count of 600 on the floor and 150 on the walls and top. 

Tom Kauss finished target hall overhead crane annual inspection today. The crane works fine. He issued new inspection tag and e-logged the job. 

Target hall crane did not work properly after power outage during Christmas time. The only movement could be operated is crane rotation. Power is supplied crane. The control board on N-S, E-W and up-down movement showed  F51 error code which is tripped limit.. All these clues pointed to a PLC control problem.  Don dale was asked for help. He used the crane control PLC program on an old computer  in RH control room reset the PLC system. Everything works fine after his reset.

Tom Kauss inspected target hall crane yesterday. The crane works fine. Tom has this inspection record in his file. The inspection tag has been issued.

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 2023.

The conductance check on the electrical check was found to be outside of accepted values for the TBHT at 7.0 mOhm. A successful attempt to reduce the conductance was made by re-tightening the bolts on the TGHT legs in the SHC. Grant operated the manipulator and torqued the bolts to about 1/8 of a turn with the air ratchet. The conductance across the TGHT (A-B) could be improved from 7.0 mOhm to 6.2 mOhm by re-tightening the bolts. The value is still somewhat higher than usual, but was deemed to be acceptable. Measurements attached.

Anders Mjos wrote:

The conductance check on the electrical check was found to be outside of accepted values for the TBHT at 7.0 mOhm. A successful attempt to reduce the conductance was made by re-tightening the bolts on the TGHT legs in the SHC. Grant operated the manipulator and torqued the bolts to about 1/8 of a turn with the air ratchet. The conductance across the TGHT (A-B) could be improved from 7.0 mOhm to 6.2 mOhm by re-tightening the bolts. The value is still somewhat higher than usual, but was deemed to be acceptable. Measurements attached.

1. TGHT leg bolts were loosened, and resistance was measured very high, as expected.

2. TGHT leg bolts were then tightened, loosened, and tightened again, and the resistance improvement was then measured (from 7.0 mOhm to 6.2 mOhm).

3. Another attempt was then made to loosen and tighten to see if there would be further improvement.  The right bolt was loosened, but the left bolt was found to be quite stiff and was left as-is (not fully loosened) for fear of breaking the supporting insulator.  Both bolts were then re-tightened, and resistance was checked to be about the same as achieved during the previous loosening / tightening attempt (step 2 above).

To tighten the bolts in all cases: the air ratchet was used first to turn the bolts "air tight" (air pedal only, no manual force) and then with the air pedal held down, manual torque was applied to turn no more than 1/8th of a turn.

Anders Mjos wrote:

The conductance check on the electrical check was found to be outside of accepted values for the TBHT at 7.0 mOhm. A successful attempt to reduce the conductance was made by re-tightening the bolts on the TGHT legs in the SHC. Grant operated the manipulator and torqued the bolts to about 1/8 of a turn with the air ratchet. The conductance across the TGHT (A-B) could be improved from 7.0 mOhm to 6.2 mOhm by re-tightening the bolts. The value is still somewhat higher than usual, but was deemed to be acceptable. Measurements attached.

 The full electrical check was done on October 25th 2013. The results are in the attached PDF. The higher value of the conductance was dealt with see Anders Mjos elog entry for those details.

UCx#2 has been removed from Tm1 and put in a bucket with a slow argon feed and a lid placed lossely on top.

TaC#1 ITW has been installed and is awaiting testing at the cell.

November 5, 2024 - Aaron Tam

TiC#9 HP-SIS removed from TM4

• Top left fixing bolt shows signs of heating on it (Comparison photos attached Bolt_profile.jfif  & Bolt_Tops.jfif)
• Location and orientation of darker bolt (Darker_bolt.jfif)

Parasitic Targets Removed

• Left target has residue left from ablation 

See photos attached for detail 

September 9, 2024 - Aaron Tam 

• Water from waterline found puddled on source-tray and containment box. 
• Water was wiped up as much as possible, but likely still in containment box 
• leaving to dry overnight
• Target inserted into Hotcell with nuts for the parasitic target. 4/4 socket nuts installed on upstream flange, and 3/4 installed on downstream flange

September 10, 2024 - Aaron Tam

• TiC#9 HP-SIS installed onto TM4 
• Leak check passed after retightening VCR joint
• Target Electrode Conductor screws torqued to 130 inch-lbs 
• Electrical test passed 
• Containment box cover reinstalled

Photos attached

 Target Ta#68 loaded onto TM4 

-leak check passed

-Target electrode conductor screws torqued to 130 in-lbs

-electrical check passed

Containment box cover re-installed 

photo attached 

 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 

 Ta#67 Target loaded onto TM2

Leak check passed

Electrical test passed after loosening off target electrode conductor screws, and torqueing by feel 

The Target Assembly was inspected with Chad, Jens Henning and Anders today.

• The Target Container was broken.
• Material was deposited on the Heat Shield around the Target Center Block
• Material was deposited on the IG-LIS source.
• Electrical checks to ground (HS)
  • The Extraction Electrode passed the electrical check at 1000V
  • The Exit Electrode (c) held only 40V at 22 kOhm
  • The IG Electrode 1 (f) held 250V at 390 MOhm
  • The IG Electrode 2 (g) held only 40V at 22 kOhm
• IG 1 and IG 2 both held 250V at 450 MOhm to Exit Electorde (c)
• No spark marks were observed on the 9-pin connector

See photos of the inspection on DocuShare

I attach new Target Hall schedules here for 2015 fall and winter runs (beam schedule 129). The TH excel sheet schedule for beam 129 is included also.

Weekly update of Target Hall Schedule.See Attachments 3,4

weekly update see attachment

Weekly update target hall schedule. See attachment 1,2.