 Friday, July 06, 2012, 16:03, Isaac Earle, Repair, Target 1, Target, T1-MK2 Target Repair Complete 
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Target elevation measurements and beam spot plots were completed on the T1-MK2 target and the target is now fully repaired and ready for use. It
will be returned to the storage pit when cranes are available.
A copy of the elevations measurements and beam spot plots is attached. |
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Wednesday, October 24, 2012, 17:34, Isaac Earle, Repair, Target 1, Target, T1-MK2 Target Repair Complete
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The target ladder was detached, old delta seals removed, sealing surfaces cleaned using scotchbrite pad and a dremel tool, and delta seals were installed
on the lower face of the upper slide plate. The target was leak checked and found to have no significant leaks (no response from 2s helium spray
at previous leak location on upper slide plate). |
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Monday, December 10, 2012, 15:42, Isaac Earle, Maintenance, Target 1, Target, T1-MK2 Target Maintenance
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- T1-MK2 target moved from storage pit to hot cell
- Removed unused proximity sensor and associated wiring (stored in tool-port boot box cabinet)
- Tested profile monitor actuation: seems stiff, but moves ok; start travel @ 30psi, fully in position @ 50psi |
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Friday, October 09, 2015, 15:52, Isaac Earle, Repair, Target 1, Target, T1-MK2 Protect Monitor Replacement and Inspection 12x
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When the damage to the T2 Protect Monitor was found to be caused by flying debris from a vacuum spike (see e-log #179), it was decided that the T1 Protect
Monitor should also be replaced.
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Monday, June 18, 2012, 16:27, Isaac Earle, Repair, Target 1, Target, T1-MK2 Profile and Protect Monitor Electronics Check
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Bill Rawnsley and Mike Russell performed a 'blip' test on the T1-MK2 profile monitor and protect monitors today. A possible bad wire at #9
location in the vertical array on the profile monitor was found (this is two wires above center). Bill did not think this was a serious concern and
beam tuning can be (and has been done in the past) with wires missing. Otherwise the responses were normal for both monitors and the scope readings |
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Wednesday, January 14, 2015, 13:32, Isaac Earle, Standard Operation, Target 1, Target, T1-MK2 Moved from B/L to Storage Pit
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The T1-MK2 target was transferred from the beam line to the storage pit in hole #5 using the transfer flask. A maximum field of 7.2mSv/hr was measured
at 0.5 meters from the target. A video was taken while the target was lifted from the monolith and can be found on Isaac's PC (too large to upload).
The blocks to the west and east side of the T1 monolith (level with the monolith) were swiped by Danka Krsmanovic and no contamination was found. |
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Friday, June 08, 2012, 17:01, Isaac Earle, Repair, Target 1, Target, T1-MK2 Leak Repair Update
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A leak check was performed on the T1-MK2 target in the hot cell today and confirmed successful leak-free installation of the new water supply tubes,
delta seal retaining rings, and delta seals on the upper slide plate. The remaining tasks are to install delta seals on the lower slide plate and
have the protect monitor and profile monitor electronics checked by diagnostics group. |
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Friday, September 28, 2012, 15:19, Isaac Earle, Repair, Target 1, Target, T1-MK2 Delta Seal Leak
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After removal of the leaky target cassette at position 3, plugs were installed on the target ladder and a leak check was performed. With
the target pumped down to approximately 10 mTorr, and helium detector gauge baseline of 9 on the 10X scale, a response of up to 25 on the 500X scale was
observed when leak checking the right side delta seal on the lower face of the upper slide plate using a standard 1s spray of helium at 3 psi. The |
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Friday, September 30, 2016, 16:54, Isaac Earle, Repair, Target 1, Target, T1-MK2 - New Beryllium Targets Installed
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The following work was performed on the T1-MK2 target assembly during the September 2016 Mini-shutdown:
Monday Sept 26: |
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Wednesday, March 31, 2021, 16:15, Matthew Gareau, Standard Operation, Target 1, Target, T1-MK1 target exchange
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March 29 Monday
- moved T1-MK1 target from beamline to hotcell (field from target 15mSv/hr @ 0.5m)
- flushed water through position 4 |
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Thursday, May 05, 2022, 14:39, Adam Newsome, Standard Operation, Target 1, Target, T1-MK1 and T2-MK1 profile monitor actuation test
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The profile monitor actuation tests were completed for T1 and T2. No abnormalities were noticed in vacuum during either test.
Note: an issue was observed with T2-MK1 - see e-log 290. The issue was resolved. |
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Tuesday, August 29, 2017, 12:17, Isaac Earle, Maintenance, Target 1, Target, T1-MK1 and T2-MK1 Hansen water fittings replaced
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The #6 male Hansen fittings for the T1-MK1 and T2-MK1 targets (both currently stored in the target storage pit) were replaced today with new units.
Some of the target assembly Hansen fittings had shown signs of leaking and the internal seals are not easily replaced.
"120V" warning labels were put on the micro-switch IN and OUT limit sensors for the profile monitors on both targets. These are |
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Thursday, December 22, 2011, 15:27, Isaac Earle, Maintenance, Target 1, Target, T1-MK1 Transferred to Storage Pit
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T1-MK1 target transferred from hot cell to storage pit position #3 to free up the hot cell in preparation for shut-down activities.
Current device locations in storage pit:
Pos 1: TNF Resin Can |
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Friday, July 27, 2012, 14:48, Isaac Earle, Repair, Target 1, Target, T1-MK1 Target Repair Update
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- T1MK1 target transferred from storage pit to hot cell (max field: 4700 μSv/hr
@ 0.5m)
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Wednesday, August 08, 2012, 14:40, Isaac Earle, Repair, Target 1, Target, T1-MK1 Target Repair Complete
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- Re-wired profile monitor was received from Probes Group and installed on the target
- Protect and profile monitors were 'blip' tested, both OK
- Profile monitor actuation and limit switches tested, all OK (monitor starts to travel @ 20psi, |
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Wednesday, April 17, 2013, 16:45, Isaac Earle, Standard Operation, Target 1, Target, T1-MK1 Target Leak Checked
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| The T1-MK1 target was leak checked on April 15th at the T1 monolith by Ron Kuramoto and Edi Dalla Valle. No leaks were found. |
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Friday, November 14, 2014, 17:30, Isaac Earle, Repair, Target 1, Target, T1-MK1 Target Failure / T1 Target Swap
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- On Nov 13 at ~1am the BL1A vacuum went bad. The T1 and T2 volumes were isolated and pumped
on separately, the results indicated a water leak from the T1 target. The level of the expansion tank was slightly below normal at this time, but
not enough to be conclusive. The leak was confirmed at ~9am by starting the T1 cooling package which caused a dramatic vacuum spike. Approximately |
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Thursday, May 23, 2024, 17:10, Albert Kong, Standard Operation, Target 1, Target, T1-MK1 Target Exchange (+ leak fix, service panel changes, coupler exchange) 36x
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On May 23, 2024 two sets of plugs from position 1 and 3 and a 12mm Be target from position 5 (serial #109) was removed from T1-MK1 in the Meson Hall
remote handling hot cell.
The plugs and spent target are kept in the secondary hot cell (East) on the lift table for future beamspot imaging and to cool down prior to disposal. |
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Tuesday, December 09, 2014, 14:45, Isaac Earle, Repair, Target 1, Target, T1-MK1 Repair Status (Pos'n 1 Plug Leak)
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Between Nov 14 ~ Dec 9 the following activities took place:
- The leaky 10mm Be target at pos'n 3 was removed and plugged
- The loose protect monitor electrical conduit was secured in place using an aluminum shim |
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Friday, February 06, 2015, 12:39, Isaac Earle, Repair, Target 1, Target, T1-MK1 Repair Status (Pos'n 1 Plug Leak)
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The T1-MK1 target is currently in the hot cell for repair of a leak at position 1. See E-Log #129 for details on previous work.
- Pos'n 1 right nut removed (a little stiff, but no excessive force required)
- Exterior threads cleaned w/ Scotchbrite disc on Dremel tool |
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