Reports until 16:46, Tuesday 08 August 2017
H1 CAL (CAL)
travis.sadecki@LIGO.ORG - posted 16:46, Tuesday 08 August 2017 - last comment - 13:42, Tuesday 15 August 2017(38090)
PCal End Station Calibrations

Both X and Y End Stations had their pre-end-of-O2 calibration measurements today.  Full results can be found for: EndX and EndY.  The resulting PCal Force Coefficients are:

Currently used O2 force coefficients:

     LHOX: none, not used

     LHOY: RxPD = 1.0475e-9 N/V

               TxPD = 1.5160e-9 N/V

This measurement:

     LHOX: RxPD = 1.0473e-9 N/V

                TxPD = 1.3164e-9 N/V

     LHOY: RxPD = Not calculated due to clipping

               TxPD = 1.5202e-9 N/V

Note: The values I list for "This measurement" don't match what is shown in the results found at the links posted above.  This is due to the fact that we calculated these numbers by hand since they are corrected for optical efficiency, which we know to be an issue related to the known clipping.  We used the optical efficiency that was measured in previous measurements before clipping started. 

For LHOY TxPD, this give us 0.28% variation between this measurement and the O2 epics value.

 

Comments related to this report
travis.sadecki@LIGO.ORG - 13:42, Tuesday 15 August 2017 (38209)

Log sheets for this round of calibrations attached.

Images attached to this comment