 Friday, April 17, 2015, 15:11, Keith C Ng, M9, Development, m9 t2 alignment job 6x
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Today: Restored filler shielding in T2 M9 Q1Q2 hole.
- Blocks marked with beam direction on this installation. Active faces point toward target monument.
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Monday, January 30, 2017, 12:01, Keith C Ng, M9, Development, T2 leak check with vac group
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Week of Jan 23 to 27:
- Uncovered shielding around T2 M9 area. |
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Wednesday, February 01, 2017, 15:34, Keith C Ng, M9, Development, T2 M9 Setup
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Finished setting up work area around T2 M9 front end.
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Friday, February 03, 2017, 14:57, Keith C Ng, M9, Development, Removing shield blocks and leak check results.
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Removed temporary shielding blocks from M9 hole and placed in temporary bunker. Capped with 18' shielding block. Blank off ready to be removed and target
jigs ready to be installed, weather permitting.
Raw leak check results from vacuum group attached as pdf. |
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Tuesday, February 07, 2017, 15:36, Keith C Ng, M9, Development, t2 m9 job
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- Removed blank off from t2 m9 port, had to pry off with screw driver via spring ears. Clean removal it seems.
- Blank off is 200 uSv @ .5 m, 5000 CPM above bg.
- looks like 2 knife steps all around with oozing on the left and right, 0 and 180 deg |
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Thursday, February 09, 2017, 16:14, Keith C Ng, M9, Development, t2 m9 alignment
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Prepared m9 and b1 flanges for accepting their target jigs. The target jigs need to be reset by alignment group, 15" was bumped and 8" lost
2 of the target balls into the beam line. Reflector balls were recovered with a magnet on a stick, contaminated with 250 CPM, need alignment group to decontaminate
and clean them before use and reset the two jigs. |
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Friday, February 10, 2017, 15:53, Keith C Ng, M9, Development, t2 m9 job
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Installed all jigs and Alignment group did their shoots successfully. Used individual pins on the 15" target jig and worked ok. 8" target jig
has some previously undiscovered issues from the previous shoot from 2015 but did not affect this shoot. |
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Tuesday, February 14, 2017, 16:08, Keith C Ng, M9, Development, T2 M9 2015 vs 2017 comparison
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| Attached a quick comparison of M9 exit port flanges WRT indium remnants: looks roughly the same. Will attempt to install blanking plate tomorrow morning. |
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Wednesday, February 15, 2017, 15:36, Keith C Ng, M9, Development, t2 m9 blank off
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Installed the blank off on the T2 M9 exit port:
Blank off 2013 installation procedure: 2.5 turns of the preload nut, after pins
are engaged and springs are at free length. |
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Friday, February 17, 2017, 13:33, Keith C Ng, M9, Development, T2 M9 vacuum
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Leak checked the blank off at T2 M9 exit port with Dimo Y. and Edi D.V. (Vac Group) and they confirm it is leak tight. Blank off installed on the 15th,
pumping started on morning of the 16th and leak checked today in the morning on the 17th.
Starting to clean up work area. |
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Monday, February 20, 2017, 15:58, Keith C Ng, M9, Development, t2 m9 job wrap up
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| Restored shielding to T2 M9 void, blocks seem more crooked compared to previous years. |
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Tuesday, March 13, 2018, 15:36, Keith C Ng, M9, Standard Operation, m9 alignment work
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Set up shielding canyon for M9 laser tracker job.
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Thursday, March 15, 2018, 15:48, Keith C Ng, M9, Maintenance, m9 t2 alignment job
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Blank off removed this morning, video recorded the T2 flange,B1 flange and B1 vacuum box interior. Blank off is 150 uSv/h @ .5m, 3 mSv/h on contact at
the spring eye ears. Not swiped yet, not tagged. Currently tucked between an 18' shield block and the ME27 block.
Waiting for beam lines to install the target spheres on the target jigs, expecting to install them tomorrow. |
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Friday, March 16, 2018, 13:39, Keith C Ng, M9, Maintenance, t2 m9 port inspection
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Video imaged T2 port post blank off removal, looks roughly the same as last year. Knife edge looks clean.
Attached composite photo of flange face, ring is a stand off to maintain focus distance to camera. Also attached partial composite image of 2017 |
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Wednesday, March 21, 2018, 15:22, Keith C Ng, M9, Repair, t2 m9 laser tracker jigs
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Installed the remaining laser tracker jigs for beam lines. No issues. Made sure 8" target the mounting poles did not interfere with each other and
pin drive was engaged with no issues.
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Monday, March 26, 2018, 15:57, Keith C Ng, M9, Maintenance, t2 m9 laser tracker alignment
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Removed all Leica tracker targets from M9 pit, I will proceed with blanking off T2 exit port sometime this week. Alignment group has taken possession
of their laser equipment and the target jigs. |
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Tuesday, March 27, 2018, 15:08, Keith C Ng, M9, Standard Operation, t2 m9 port blank off
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1. Blank off installed
11:40 with Dan McDonald, east spring ear looks 'deeper" than west.
- Reused all hardware from last install, most active hardware was around |
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Thursday, March 29, 2018, 15:15, Keith C Ng, M9, Maintenance, t2 m9 port blank off
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Today leak checked the M9 exit port with Edi and we found no leaks. The usual delayed helium response in the M20/Collimator B/ M8(?) area is still persistent,
however Edi says the vacuum level at T2 is the same as before.
Shielding should be restored next week. |
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Tuesday, June 11, 2019, 14:56, Keith C Ng, M9, Development, M9 B1 seal notes from 1988
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Found original installation notes for the initial installation of M9 Q1Q2 generation 2 in 1988.
Dated May 17th there is a notation that the 15 inch indium ring was loaded with "Gummy Mag". Note that the rationale for using an elastomer |
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Monday, February 24, 2020, 15:13, Keith C Ng, M9, Repair, m9 q1q2 repair laser tracker shoot
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Beamlines shot the position of the M9 T2 port and B1 flange for setting the M9 test stand flanges
today. We removed the target jigs after this was done. |
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