Reports until 11:56, Monday 19 October 2015
H1 CAL (CAL)
sudarshan.karki@LIGO.ORG - posted 11:56, Monday 19 October 2015 (22639)
Pcal Calibration Factors

SudarshanK, TravisS

Travis and Darkhan took Pcal calibration measurements at the end station last week (alog 22489). Using the gps time information from that alog we have calculated the new pcal calibration factors. The summary is that the calibration at Y-End is pretty close to what we measure last time (Aug 27) however, the calibration at X-end, atleast for RxPD, has changed significantly due to clipping of one of the pcal beam. The clipping issue at X-end is discussed in detail on another recent alog by Rick (alog 22529).

Attached is the calibration factors from each endstation compared to the most recent calibration. This report includes the parameters used and relevant intermediate numbers as well. A summarized report of the final calibration numbers is uploaded to the DCC document (T1500252). The calculation of TxPD factor and its uncertainty on X-end will have to be done little differently in light of the clipping issue. For now, I just reported what is calculated by the old code but I will work on implementing a more accurate representation.

Non-image files attached to this report