 Wednesday, June 06, 2012, 08:48, Isaac Earle, Repair, Target 1, Target, Manipulator Repair Complete
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Repair of the west side hot cell manipulator was completed and the manipulator was re-installed into the hot cell. No contamination was found
in the lab, on the manipulator support frame, or on any tools. A 'y' motion lock was also installed on the east manipulator and all accessible pulleys
and rollers were lubricated. |
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Wednesday, June 06, 2012, 08:58, Isaac Earle, Maintenance, Target 2, Target, T2 Monolith Leak Check
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While leak checking components in the M20 front end on May 25th, the top of the T2 monolith was also checked by flooding the top of the monolith
with helium while it was covered with plastic sheeting. There was no response on the Varian leak detector indicating no significant leaks from the
flange seals, shaft seals, and seals for upper services on the T2 target, T2 protect monitor, M9BB, M20BB, and M8BB/Col.A |
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Thursday, June 07, 2012, 18:08, Isaac Earle, Repair, Target 1, Target, Hot Cell Manipulator Broken Tape
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A tape snapped on the west side manipulator today while working on the T1-MK2 target repair. The tape travels through to the slave end, so
unfortunately the manipulator will need to be removed from the hot cell for repair. This is the same manipulator that was just out for a broken cable
repair, and I suspect that the tape was accidentally kinked or dislodged from a pulley when the manipulator was disassembled. |
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Friday, June 08, 2012, 16:52, Isaac Earle, Repair, Target 1, Target, Broken Manipulator Tape Update
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The broken tape on the west side hot cell manipulator was found to be one of two "Z motion slave tapes". The manipulator can still
function normally with only one, however the remaining tape will see twice the load as usual. It was decided that repair of the manipulator may be
delayed until after the T1-MK2 target repair job is complete. Lifting of heavy objects using the west side manipulator will be avoided until after |
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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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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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Friday, June 22, 2012, 13:54, Isaac Earle, Maintenance, Target 2, Target, Air Amplifier Rebuild Complete
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A full rebuild of the upper air amplifier was completed. New anodized aluminum barrels were installed (replacing the old brass design), as well
as new pilot valves, piston seals, bearings, and o-rings.
The amplifier is operating smoothly with a cycle period of 25.6 seconds, compared to 14.8s before rebuild (based on 8 cycle measurents at 110psi |
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Friday, June 29, 2012, 14:18, Isaac Earle, Repair, Target 1, Target, Manipulator Repair Complete
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Repair of the west side hot cell manipulator was completed and the manipulator was re-installed into the cell. The z-motion slave tapes,
upper counterweight tapes, and lower counterweight tapes were replaced on both sides.
100cpm contamination was found on the slave arm from a wet wipe. No contamination was found in the lab. |
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Tuesday, July 03, 2012, 13:23, Isaac Earle, Standard Operation, Target 2, Target, T2 Plug Block Replaced & Beam Blockers Tested
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The T2 plug block was replaced and the M9 and M20 beam blockers were tested. The plug block did not interfere with the travel of the beam blockers.
There was no change in the T2 vacuum during BB actuation.
Initially there was some confusion about how to actuate the beam blockers. The following was learned: |
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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Monday, July 09, 2012, 17:17, Isaac Earle, Standard Operation, Target 1, Target, BL1A Start-Up Prep
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- T1 & T2 targets switched to "remote" control
- Both target ladders were moved to Position 3 (12mm Be)
- T2 Q1 flow interlock defeat was removed (only required when target ladder is in position zero) |
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Wednesday, July 11, 2012, 17:51, Isaac Earle, Repair, Target 1, Target, T1 Target Swap
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BL1A was started yesterday and brought up to 10μA. A problem was noticed with the T1 protect monitor (the right and bottom plates were not showing any response when the beam was swept
across the monitor). The protect monitor is new and was installed on the target assembly in February 2012, so this is the first time it has seen |
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Monday, July 23, 2012, 16:01, Isaac Earle, Development, Target 1, Target, Target Flask Seismic Restraint Clamps Installed
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Installation of the seismic restraint clamps has been completed for the MK1 and MK2 target flasks in the Remote Handling lab (photos attached).
Two clamps on the MK1 flask required 3/8" shims due to warpage of the flask baseplate (see photo IMG_0429).
Dragan Mitrovic has been notified so that he can inspect the installation and close the work request. |
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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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Friday, September 07, 2012, 16:35, Isaac Earle, Repair, Target 2, Target, T2-MK1 Target Repair Completed
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- Profile monitor wiring harness checked by Bill Rawnsley using resistor pack --> OK
- New profile monitor (0.005" gold coated molybdenum wires) installed & blip tested --> OK
- Potentiometer checked --> OK |
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Friday, September 07, 2012, 16:39, Isaac Earle, Repair, Target 1, Target, RH Lab Crane Repaired
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The "west" button on the crane pendant was broken, and the crane would occasionally continue moving west when the button was released.
The button was replaced by a Gordon Crane technician, who also did a crane inspection. The hoist in the target flask is also due for an inspection,
but it was not possible to do it this visit. Neil Wong will try to have it done next time a crane technician is in. |
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Tuesday, September 25, 2012, 16:31, Isaac Earle, Repair, Target 1, Target, T1/T2 Controls
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- The target control software was modified to reference the correct pot. look-up table for the target at T1 (T1-MK1)
- The target position buttons on the T1 & T2 panels were not working properly and Graham Waters was contacted to investigate
- Graham power cycled the microprocessor and the TG1 crate which seemed to make things worse (the control software would not even boot up) |
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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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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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