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

Disconnect electronics rack, move out of way (no need for this SM)

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

Materials and Tools

Items in NIRC2 container

NIRC2 Cryo Docs

Service pics from Aug2003

Service pics from Sep2011 (including videos)

NEW! Service pics from Sep2012 (including videos)

Monitor temperatures

Restrictions