NIRC2 Service Mission
Purpose: Trouble shoot sticky camera stage. Change the split nut compression; reset clearance and preload. Inspect and free up lead screw. Possibly replace roller screws.
Schedule: September 2012
08 Sep, Sat | Turn off CCR cold heads (no need to disconnect gas lines or turn off compressor); Begin warm-up; Confirm vacuum pump on; Monitor warm-up with temp watch script, plots, + normal log; Turn off electronics |
D. Chan, H. Tran |
11 Sep, Tue | Ship two wooden NIRC2 boxes containing lid guides and shield supports from HQ warehouse container to summit | D. Chan, H. Tran, D. Callan |
10-11 Sep, Mon - Tue | Prep K2-AO for clean up Check crane operation; clean hoist Remove excess material, seal openings, install dust monitoring instruments, etc. Complete thorough cleaning of AO enclosure; wipe down surfaces; seal coude hatch, AO hatch measure dust particles; turn on HEPA filter no other entry from 11 Sep until 18 Sep |
D. Chan + |
16 Sep, Sun |
Prep work: prepare tools, inspect clean area, release vacuum in dewar (back fill with dry N2), prepare hoist, guides |
K. Matthews, H. Tran, D. Chan |
17 Sep, Mon | Open Dewar (measure particle counts before opening dewar) Trouble shoot camera stage; inspect screw; adjust preload (removed one of two wave washers); adjust stop block on lead screw Close dewar; turn vacuum pump on |
K. Matthews, H. Tran, D. Chan, S. Milner |
18 Sep, Wed | Put cold head switch on remote Test moving camera stage in vacuum when warm Turn on cold heads (60 RPM) - cooldown starts |
K. Matthews, D. Chan, H. Tran |
19 - 28 Sep, Wed-Fri | Monitor cooldown; tune CH speeds Ship NIRC2 boxes from summit back to HQ storage |
K. Matthews, R. Campbell D. Chan, D. Callan |
26 Sep, Wed | Turn on electronics; | D. Chan; |
28 Sep, Fri | CCR's speed tuned, Dewar at equilibrium NIRC2 fully operational |
R. Campbell |
01 Oct, Mon | NIRC2 Engineering Night | R. Campbell, C. Neyman |
03 Oct, Wed | NIRC2 Science | J. Crepp |
Service pics from Sep2011 (including videos)
NEW! Service pics from Sep2012 (including videos)
Restrictions