 Tuesday, November 26, 2013, 10:33, Isaac Earle, Repair, Target 2, Target, T2-MK2 Water Flush
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The T2-MK2 target in the hot cell was flushed with water and then purged with air so that stagnant water is not left sitting in the target. Replacement
of the failed 10cm Be cassette will take place in January 2014. |
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Monday, April 11, 2016, 13:54, Isaac Earle, Standard Operation, Target 2, Target, T2-MK2 Target Transported from BL to HC
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The T2-MK2 target was transported from the beam line to the hot cell using the transfer flask. The target was measured to be 120mSv/hr at 0.5m.
The steel shielding plug was installed in the T2 target hole to reduce upwards shine.
New beryllium target cassettes will be installed on the target ladder before it is returned to the beam line. |
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Wednesday, June 15, 2016, 11:00, Isaac Earle, Standard Operation, Target 2, Target, T2-MK2 Target Moved to Position #1
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Position #4 on the T2-MK2 target has now reached the maximum beam time. The target was moved to Position #1 at the nominal elevation. This
target should be used for the remainder of the 2016 running period. |
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Monday, January 09, 2017, 15:07, Isaac Earle, Standard Operation, Target 2, Target, T2-MK2 Target Moved from BL to HC
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The T2-MK2 target assembly was moved from the beam line to the hot cell today. A maximum field of 203mSv/hr was measured at approximately
0.5m
A steel shielding plug has been installed in the T2 hole to reduce shine and allow the T2 volume to be pumped down. |
Monday, March 18, 2013, 15:17, Isaac Earle, Maintenance, Target 2, Target, T2-MK2 Target Maintenance and Re-Wiring 
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- T2-MK2 target moved from beamline to hot cell (Feb 4th)
- Steel target support shield installed as well as ~3 layers of lead blankets. Even with this extra shielding fields in the working area were
as high as 800µSv/hr. |
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Thursday, October 01, 2015, 11:43, Isaac Earle, Repair, Target 2, Target, T2-MK2 Target Ladder Drive Motor Failure
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The stepper motor that drives the target ladder on T2-MK2 has failed. This is the cause of the difficulty moving the target ladder yesterday
afternoon (see previous e-log). This was confirmed this morning by attempting to move the T1-MK1 target ladder in the storage pit using the portable
control box - the ladder moved with no issues. |
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Friday, April 24, 2015, 11:53, Isaac Earle, Standard Operation, Target 2, Target, T2-MK2 Target Info Sheet & Elevations
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T2-MK2 target information sheet, beam spot measurements, and elevations were updated and delivered to Operations. PDF copy attached.
No work was done to T1-MK2 (placed in storage pit for 2015 shutdown duration to lower fields), so the sheets will not be updated. |
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Friday, April 15, 2016, 14:54, Isaac Earle, Standard Operation, Target 2, Target, T2-MK2 Target Changes & Return to Beamline
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On April 11th the T2-MK2 target was flushed with water, then overnight with air at 5psi supply pressure. The target ladder was in Position 0 for
this procedure.
On April 12th the target was pumped using a cold trap and the Varian leak detector for approximately 2 hours. |
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Monday, April 20, 2015, 11:42, Isaac Earle, Standard Operation, Target 2, Target, T2-MK2 Target & T2 Protect Moved
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The T2-MK2 target was moved from the hot cell to the beam line. The T2 Protect Monitor was moved from the beam line to the hot cell. The
T2-MK2 assembly measured 136mSv/hr at 0.5m, and the protect monitor was 8mSv/hr. Total dose incurred by Isaac Earle: 0.18mSv. No dose
to other workers |
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Monday, January 06, 2014, 15:55, Isaac Earle, Repair, Target 2, Target, T2-MK2 Repair
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The leaking 10cm Be target was removed from position 3 on the T2-MK2 target ladder and the water ports were blanked-off with 3/8" Swagelok
plugs. A 10cm Be target remains in position 4. The target was pumped down using the cold trap and a helium leak check was performed. All
target locations on the ladder were found to be leak tight. The delta seal locations and fittings above the vacuum flange were also leak tight, however |
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Friday, May 13, 2016, 15:04, Isaac Earle, Standard Operation, Target 2, Target, T2-MK2 Position 4 Adjusted to +1.5mm Offset
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The T2-MK2 target at Position 4 has been adjust to approximately +1.5mm offset. This causes the ladder to be moved downwards, raising the beam
spot location on the target window. The potentiometer ratio at this offset is approximately 0.810 (> 0.8059 nominal ratio for position 4, and
therefore closer to Position 5) |
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Thursday, January 12, 2017, 09:21, Isaac Earle, Standard Operation, Target 2, Target, T2-MK2 Position 1 Beam Spot
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The beam spot on the 10cm beryllium target in Position 1 on T2-MK2 (Target ID: "OCT.06#3") was measured and photographed yesterday. A
fairly well centered spot was measured to be approximately 4.6mm wide x 5.2mm tall on the entrance window and 5.7mm wide x 7.6mm tall on the exit window
using the Nikon micrometer level. This target first saw beam on June 16, 2016. |
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Thursday, March 12, 2015, 10:51, Isaac Earle, Standard Operation, Target 2, Target, T2-MK2 Pos'n 4 Elevation Measurements
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Elevation measurements of the T2-MK2 target were taken in the hot cell to confirm previous records in preparation for the T2 Protect Monitor adjustment
that will take place later this shutdown. Potentiometer readings were also checked for ladder position 2mm above and below nominal in case we decide
to run the target in an offset position again. |
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Thursday, January 09, 2014, 15:21, Isaac Earle, Repair, Target 2, Target, T2-MK2 Electrical Check
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An electrical check was performed on the T2-MK2 profile monitor by Bill Rawnsley. All signals produced the expected response, and Bill approved
the monitor for use. Bill has saved screenshots of the signal profile.
The target ladder position micro-switches and profile monitor in/out limit switches were also tested: all OK. |
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Friday, October 09, 2015, 15:18, Isaac Earle, Repair, Target 2, Target, T2-MK2 Check at Hot Cell and Motor Drive Cable Replacement 7x
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While the T2 monolith was uncovered for T2 Protect repair (see previous e-log), it was decided that the T2 target should be moved to the hot cell to
address issues discovered last week with target ladder movement (see e-log #175)
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Thursday, May 05, 2022, 14:38, Adam Newsome, Maintenance, Target 2, Controls, T2-MK1: profile monitor actuation check and repair to connector
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An attempt was made to actuation the T2 profile monitor, however it showed up in EPICS as being not present. Furthermore, the "Remote"
indicator light on the physical controller was not lit up despite the switch being in remote mode. The limit switch indicator light was working.
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Wednesday, April 13, 2022, 12:33, Adam Newsome, Standard Operation, Target 2, Target, T2-MK1 moved: from storage area to target station
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The T2-MK1 target was moved from the storage area (formerly position 4) to the target station. Services were reconnected in order to prepare for normal
operation. |
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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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Tuesday, January 08, 2013, 10:52, Isaac Earle, Maintenance, Target 2, Target, T2-MK1 Target Maintenance
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- T2-MK1 target transported from storage pit to hot cell
- Proximity sensor removed
- Target lift "T" removed, painted, relabeled |
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Thursday, November 05, 2015, 17:07, Isaac Earle, Repair, Target 2, Target, T2-MK1 Profile Monitor Repair and Pos'n 3 Target Removal 8x
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The following work was performed on the T2-MK1 target. The profile monitor and monitor cage on this target were damaged in January 2013, See E-Log
#68
Oct 23: |
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