HARP-B Cooldown 1 23-26Jan03

1
HARP-B Cooldown 1 23-26Jan03

• Cooldown 1 Test of vacuum, infrastructure, CTI,
  MAP (60 20K). Measurement of COP movement.

2
Cooldown 1 - Data

• Successes
• specification temperatures met
• data logging went very well
• alignment OK when cold
• infrastructure gremlins mastered
• timing lessons learnt

• Problems
• Daikin chiller trip (overload) took 24 hrs to
  resolve
• LN2 fill
• went OK but was not completed (because of time on
  other faults)
• adds about 18-24hrs to cool down time
• LN valved off with Bunsen valves as pop-offs
  delivered late. One valve leaked...
• liquified air in LN tank and then ice-plugged
• slowed cooldown and warm up
• pop-off valves now fitted
• Alignment change on warm up of one mirror
• investigating

3
(No Transcript)
4
(No Transcript)
5
(No Transcript)
6
(No Transcript)
7
Full history
8
HARP-B MAP dummy 03Jan03

• MAP dummy assembled after cooldown1

9
MAP Dummy
10
MAP dummy