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Reports until 17:42, Friday 06 October 2017
H1 SUS
travis.sadecki@LIGO.ORG - posted 17:42, Friday 06 October 2017 - last comment - 16:05, Monday 09 October 2017(38924)
ITMx fiber welding complete

A. Bell, J. Oberling, T. Sadecki

ITMx has been successfully hung as a newly welded monolithic.  I'll leave it to Jason to post the actual numbers, but the PUM to TM differential pitch better than the old version of ITMx.  Now to put it back together in chamber next week.

Comments related to this report
jason.oberling@LIGO.ORG - 16:05, Monday 09 October 2017 (38952)

Final alignment numbers for the new monolithic are below.  All measurements were done with the ITMx suspended, PUM and UIM locked.  All directions assume the reader is looking in the +X direction (i.e. at the ITMx AR surface); it should be noted for future reference (if comparing to the numbers in the alignment notebook) that this is opposite the convention used in the alignment notebook, which is set relative to the IAS equipment used in the alignment and looks in the -X direction (at the ITMx HR surface).

  • Roll
    • PUM: 0.15 mm CCW
    • ITMx: 0.20 mm CCW
  • Pitch
    • PUM: 1.51 mrad down
    • ITMx: 1.20 mrad down
    • Differential: 310 µrad up
  • Fiber Stretch
    • Left: 5.7 mm
    • Right: 5.8 mm
  • PUM/ITMx Center of Mass Separation
    • Left: 601.5 mm
    • Right: 601.4 mm

The serial numbers of the fibers used and their locations in the monolithic are as follows:

  • +X/+Y
    • SN S1400158
  • -X/+Y
    • SN S1400137
  • -X/-Y
    • SN S1400164
  • +X/-Y
    • SN S1400154
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