richard.savage@LIGO.ORG - posted 15:29, Tuesday 29 January 2019 (46695)
Pcal Yend responsivity ratio measurements and installation of beam path apertures
NikoL, DimitriEstevez (Virgo), RickS
This morning, we repeated the end station calibration measurement procedure (T1500062-v7). The calibration log is attached below.
The values measured today are within 0.1% for both sensors.
| Sensor | Dec. 13 | Jan. 15 | Jan. 29 | ratio (Jan 29/Jan 15) |
|---|---|---|---|---|
| Tx (V/V) | -0.480810 | -0.480448 | -0.480937 | 1.00093 |
| Rx (V/V) | -0.715832 | -0.715410 | -0.716157 | 1.00104 |
The beam positions at the Rx power sensor aperture are a bit high and to the right (see attached photo).
We also installed the beam path irises and relay mirror mounts on kinematic bases to help find the beam paths in case of catastrophic laser failure (see attached photos).
The shutter, recently repaired by FilibertoC and RichardM, has not yet been re-installed.
Images attached to this report
Non-image files attached to this report
