Cleaning of the suspended test mass (Dec 2009)

Motivation

Whether contamination or not

Measurements before the vent

- Visibility measurement

- Finesse measurement

Overview of the plan

• We plan for the vent from 7th Dec to 11th Dec in 2009.

• Preparation

  • wiping preparation
  • wiping practice
  • aux beam as a reference....align to overlap in vacuum
  • Input PZT (strain gauge) /HV off/OMC PZT HV
    • update snap shots: sus, strain gauges,IOO, OMC....etc (OMC has no strain gauges)
    • recenter: IP-ANG-POS, oplevs..... at full lock
    • test drive crane drives
    • clean clean-tools again
    • keep eyes on particle counter: abort over 10,000
    • cut some viton tips for spare earthquake stop screws

• Monday:

  • Vent / Open ETMX if possible
  • Take pictures before touching
  • Record positions of the mirrors (OSEMs/OPLEVs)

• Tuesday:

  • ETMX wipe
  • ETMY wipe

• ~ Wednessday:

  • IPANG beam
  • ITMX position (pushing screws)
  • ITMX BB leveling
  • measure the distance of the breadboards
  • check of the optics in the chambers
  • ITMY wipe
  • ITMX wipe

• Thursday: - Evacuation

• Friday:

Detailed plan

• Friday, 4 Dec:

  • Practice cutting viton, so we can get the correct sizes if we need to replace stops. (Jenne)
  • Recenter all of our pointing PDs (oplevs and IP_POS, IP_ANG).
  • Update snapshots of all MEDM screens that have alignment information.
  • Move extraneous equipment around chamber doors: Make sure we have clear access (esp. seismometers need moving)

• Monday:

  • Before venting, check that all the recentering done on Friday is still good. If not, redo.
  • Vent
  • During vent, practice drag wiping a spare random optic (maybe a 2" CVI optic?)
  • Open ETMX
  • Take photos of ETMX before touching
  • Close up ETMX with light doors for the night

• Tuesday:

• Wednesday:

• Thursday:

• Friday: