Reports until 16:13, Monday 26 November 2018
LHO VE
chandra.romel@LIGO.ORG - posted 16:13, Monday 26 November 2018 - last comment - 17:24, Monday 26 November 2018(45509)
valved in 3 IPs and 3 NEGs

Valved in pumps in this order:

  1. NEG3
  2. NEG2
  3. NEG1
  4. IP3 (no baffle)
  5. IP4 (no baffle)
  6. IP1 (w/baffle)

Left IP2 valved out as it cleans up from being up-to-air. It is currently running at 5kV.

Turbo is currently still valved in.

 

Images attached to this report
Comments related to this report
chandra.romel@LIGO.ORG - 17:12, Monday 26 November 2018 (45512)
Link

Valved out turbo.

chandra.romel@LIGO.ORG - 17:20, Monday 26 November 2018 (45513)
Link

RGA scans attached:

  • turbo only
  • turbo + 3 IPs + 3 NEGs
  • 3 IPs + 3 NEGs (no turbo)

Partial pressure of water continues to fall and currently at ~ 3e-7 A, with RGA in SEM mode. Pre-vent reference (with leak) was 1e-7 A with four IPs valved in (NEGs and CPs valved out).

Total pressure is currently 7.3 x 10-8 Torr.

Non-image files attached to this comment
chandra.romel@LIGO.ORG - 17:24, Monday 26 November 2018 (45516)
Link

Kyle increased IP2 supply voltage to 7kV late in the day. Pump pressure is still relatively high (10-7 Torr range).