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Message ID: 35     Entry time: Thursday, February 07, 2013, 16:02
Author: Keith C Ng 
Category: M9 
Type: Repair 
Subject: M9 Q1 Q2 removal, site prepration 

Started work on removing M9 Q1 Q2 magnets; area clean up and preparation, removing shielding above Q1 and Q2 and remote handling setup over magnet (moving blocks).

 

1. Covered T2 cooling package and top of monolith with plastic sheeting.

- In addition covered 1A triplet shielding as well.

- Installed 1AS1 18' shield block after sheeting was laid down.

20130207_m9q1q2remove_IMG_0155.JPG20130207_m9q1q2remove_IMG_0162.JPG

 

2. Discovered 1A Q14 indium ring thermocouple (TW# B1-378) & thermocouple coil circuit #1 (TW# B1-379) had cable insulation damage. Damage was down to bare wire.

- Wires located under east side of cooling package. See photo.

- Wires repaired with black electrical tape.

20130207_m9q1q2remove_IMG_0154.JPG20130207_m9q1q2remove_IMG_0157.JPG

  

3. Vacuum started on T2 volume @ 10:47, roughing pump only.

- @ 11:15 vacuum pressure leveled off at 1.5 T (1ACG4 reading). 11:15.

- @ 13:30 the roughing pump blower package was turned on.

- @14:45 vacuum level steady at 250 mT (1ACG4 reading) .

 

4. Uncovered and partially set up over T2 M9, Q1 Q2.

- This setup is similar to 2011 and 2012 setups.

- 1A Q12 and 13 were uncovered during setup and a visual check for water leaks was done. None were found.

- Setup uses two 12' x 6' x 4' blocks with 18' x 6' x 4' resting on top, spanning the joint; See photo.

- Will continue with set up next day.

 

20130207_m9q1q2remove_IMG_0165.JPG

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