40m QIL Cryo_Lab CTN SUS_Lab TCS_Lab OMC_Lab CRIME_Lab FEA ENG_Labs OptContFac Mariner WBEEShop
  40m Log  Not logged in ELOG logo
Entry  Thu Nov 12 16:13:05 2009, Alberto, Update, PSL, MC Trans Offset 
    Reply  Thu Nov 12 17:15:43 2009, Koji, Update, PSL, MC Trans Offset MC_TRANS.png
       Reply  Thu Nov 12 17:42:04 2009, Koji, Update, PSL, MC Trans Offset PC_DRV.png
Message ID: 2256     Entry time: Thu Nov 12 16:13:05 2009     Reply to this: 2258
Author: Alberto 
Type: Update 
Category: PSL 
Subject: MC Trans Offset 

On Rana's suggestion I checked the MC transmission QPD (C1:IOO-MC_TRANS_SUM). I found that the readout is almost zero when the MC is unlocked.

I unlocked the Mode Cleaner turning off the LSC control and disabling the autolocker. The QPD reads 0.014. It seems that there is no offset.

I also checked with the IR card around the photodetector and I didn't see any stray beam.

ELOG V3.1.3-