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Reports until 10:42, Tuesday 05 May 2015
H1 AOS (SUS)
kiwamu.izumi@LIGO.ORG - posted 10:42, Tuesday 05 May 2015 (18237)
oplev calibration on ETMX and ETMY

Jason, Kiwamu,

We revisted the calibration of the oplev on ETMX and ETMY which showed calibration error of a factor of a few (alog 18218). In fact, they alll had underestimated the suspension angle by roughtly a factor of two. Here is a summary table of the calibration factors:

  old calibration [urad/cnts] new calibration [urad/cnts]
ETMX PIT 81.2 222.5
ETMX YAW 115.2 263.4
ETMY PIT 77.94 172.2
ETMY YAW 53.55 115.4

We also updated the SDF so that these new values are already reflected. Note that the number I updated yesterday was not accurate enough (alog 18218) since I was using the misaligned ETMX. We calibrated it again with the aligned suspension. I attach the measurement data nad fitting codes as a zip file.

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