yannick.lecoeuche@LIGO.ORG - posted 12:42, Wednesday 10 April 2019 (48387)
04/02, 04/09 EY pcal calibrations
[Rick, Niko, Sharan]
Forgot to post last week's EY end station calibration measurement, so we're including both this week and last week's in this alog.
Last week's measurement showed some deviation from the trend of the previous four measurements. We later realized on Wednesday that the AOM needed adjusting and the beam alignment was slightly off (see 48206), which could have contributed to the deviation.
To double check, we went to EY again this week and took another measurement. The RX beam alignment looked good, and our result seems to agree with the trend from before last week's measurement to within a few hundredths of a percent.
| Sensor | Dec. 13 | Jan. 15 | Jan. 29 | Feb. 26 | Apr. 02 | Apr. 09 | Apr. 09 / mean of all prev. meas. | Apr. 09 / mean of prev. meas. skipping Apr. 02 |
|---|---|---|---|---|---|---|---|---|
| Tx (V/V) | -0.4808 | -0.4804 | -0.4809 | -0.4808 | -0.4792 | -0.4813 | 1.0016 | 1.0010 |
| Rx (V/V) | -0.7158 | -0.7154 | -0.7162 | -0.7153 | -0.7151 | -0.7157 |
1.00016 |
1.00002 |
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