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Reports until 12:17, Monday 02 December 2019
H1 SUS
cheryl.vorvick@LIGO.ORG - posted 12:17, Monday 02 December 2019 - last comment - 14:29, Tuesday 03 December 2019(53622)
TEST OFFSETs on all optics: ETMX Yaw to be reverted, questions about TMS changes

TEST OFFSETs on  all optics are typically a fixed value, and not active during NLN/Observe.  Currentl there are two situations that need correction/understanding, listed below:

  1. This weekend with reboots, ETMX TEST Yaw Offset became 0, when nominal is -8.4.  This was acknowledged by Patrick, and is on our list to revert.  This does not change the alignment of ETMX, no functional change to H1 in NLN, may have caused issues with Initial Alignment.
  2. TMS TEST Offset values have been changing since 19 Nov 2019.  This is different than before that date, where the values were fixed.  The offsets are currently ON, which means they are involved with the overall alignment of TMS.  This is different than all ofther optics.  Currently working to understand the change.

Plots of ETMX TEST YAW and TMS TEST OFFSETs attached.

Current list of TEST OFFSET values:

Images attached to this report
Comments related to this report
thomas.shaffer@LIGO.ORG - 15:13, Monday 02 December 2019 (53625)
Link

Looks like the only work in the alog on Nov. 19th, that mentions the TMSs, is Craig's QPD servo work (alog53362). The script he mentions doesn't seem to be checked into the SVN, so I can't see it at the moment to see if it uses the TEST bank.

thomas.shaffer@LIGO.ORG - 14:29, Tuesday 03 December 2019 (53657)
Link

Looking at the tms_qpd_centering_servos.py script, this is where the TMS change on the 19th came from.

All mysteries solved.

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