 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 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. |
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, 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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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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Wednesday, October 24, 2012, 17:38, Isaac Earle, Repair, Target 2, Target, T1 & T2 Target Ladder Control System Status
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During the recent shutdown for the T2/M9 joint repair Graham Waters replaced the corrupted application code on the controller RAM disk. The
T1 target position control is now functioning properly. T2 target position control is still not operational due to an electronics problem within
the motor driver. The T2 ladder position may still be moved using the portable control box. The T2 target ladder was moved to position 3 (10cm |
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Tuesday, November 13, 2012, 16:26, Isaac Earle, Repair, Target 1, Target, Manipulator Repair Complete
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Repair of the west side manipulator in the west hot cell was completed today. Part of the repair was done by entering the hot cell using
double tank suits and supplied air. The repair was then completed on the master side of the manipulator. The manipulator is now operating smoothly.
Two sales representatives from Central Research Labs visited TRIUMF today as they were already in Vancouver on other business. I showed them |
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Monday, January 21, 2013, 11:57, Isaac Earle, Repair, Target 2, Target, Flask Repair
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On January 15th, when attempting to move the T2 target from the beam line to the hot cell, the latch mechanism on the flask did not actuate and
the target could not be lifted from the beam line.
On January 16th the flask was placed on blocks (IMG_0818) (while remaining attached to the crane) in the RH hot cell lab for inspection. The |
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Tuesday, April 09, 2013, 17:06, Isaac Earle, Repair, Target 1, Target, T1 Target Electronics Check
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The T1-MK1 target protect and profile monitor electronics were 'blip' tested by Bill Rawnsley on April 5, 2013. The response from the profile monitor
appeared normal, however the protect monitor response was very weak. After various debugging it was found that the 9 pin connector on the target
on the vacuum side of the vacuum flange had become disconnected from the vacuum flange feed-through. It is suspected that this happened while changing |
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Friday, May 31, 2013, 16:07, Isaac Earle, Repair, Target 1, Target, Power Supply Fan Failure
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Today (May 31, 2013) I was contacted regarding a burning smell and high temperatures around the T1/T2 controls racks. Erwin Klassen, Bill
Rawnsley, Graham Waters and myself investigated and found that the cooling fans for two power supplies on the T1/T2 control racks had failed and both units
were warm to the touch. The power supplies are labeled "T1 Power Supply" and "T2 Power Supply" in racks 1-F and 1-A respectively. |
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Tuesday, June 04, 2013, 13:42, Isaac Earle, Repair, Target 1, Target, T1 and T2 Power Supply Fans Replaced
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Replacement of the power supply fans for the T1 Power Supply, T2 Power Supply, as well as an additional power supply in rack 1A was completed this
morning. The boxes were blown out with air to remove dirt and dust. The inside of all boxes were inspected and no evidence of melting or burning
was found. |
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