keita.kawabe@LIGO.ORG - posted 16:41, Tuesday 04 November 2014 - last comment - 16:43, Tuesday 04 November 2014(14845)
PR2 scan shows additional 0.7 to 0.8% clipping somewhere
Attached shows the DC sum of AS_C QPD (normalized by the maximum measured) VS the YAW offset of PR2. I haven't touched PIT.
Green vertical line is where we're at now.
After doing the scan represented by red crosses, I took another set of scan (blue circles) to see how the measurement fluctuates, and it seems like it didn't change much (which is good).
No further analysis yet.
Images attached to this report
Comments related to this report
What was done:
Feed back the AS_C QPD signal to ITMX using ASC. Input matrix DHARD-AS_C =1. ASC ouput matrix from DHARD to IX PIT=1, YAW=-1.
Scan PR2 in YAW. Measure 10 sec average of AS_C DC SUM using tdsavg.