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VIS (BS)
fabian.arellano - 12:32 Wednesday 23 September 2020 (15071) Print this report
Fishing rod health check and keystone height without feedback at 23.3 degrees Celsius.

Due to temperature change I changed the setpoint for F1 because the fishing rod is at the end of its range. This won't affect the IFO because the BS is flat.

I ofloaded F0 and BF coil-magnet actuation onto fishing rods:

  • F0 and BF fishing rods look healthy
  • F1 fishing rods it's at the bottom of its range so there's a relatively large amount of actuation: -13,000 counts (before changing the setpoint, see below).

The positions of the keystones without DC control (after offloading) are:

  • F0: -8 um
  • F1: 407 um
  • BF: -2 um.

Given this situation I decided to change the setpoint again: 230 um →407 um. I took a "GAS setpoint snapshot" and changed the SDF values in the ALIGNED, MISALIGNED and SAFE snapshots.

K1:VIS-BS_F1_SET_GAS_OFFSET at 12:12 JST

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