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  Wed Oct 15 20:10:29 2014, ericq, Update, LSC, Interim DARM Signal 7x
    Reply  Thu Oct 16 16:21:42 2014, ericq, Update, LSC, Interim DARM Signal dcDARMSweep-300.pdfdcDARMSweep-120.pdfdcDARMSweep-50.pdfdcDARMSweep-0.pdf
       Reply  Thu Oct 16 21:20:59 2014, rana, Update, LSC, misleading modelling 
          Reply  Fri Oct 17 03:05:00 2014, ericq, Update, LSC, DARM locked on DC Transmission difference TRdifflock.pngOct17lock.pdf
             Reply  Fri Oct 17 13:19:48 2014, Jenne, Update, LSC, POP22 ?!?! 
          Reply  Tue Oct 21 00:38:40 2014, ericq, Update, LSC, sweep + RMS as uncertainty dcCARMSweep_uncertainties.png
             Reply  Wed Oct 22 06:32:29 2014, rana, Update, LSC, sweep + RMS as uncertainty 
Message ID: 10618     Entry time: Thu Oct 16 16:21:42 2014     In reply to: 10613     Reply to this: 10619
Author: ericq 
Type: Update 
Category: LSC 
Subject: Interim DARM Signal 

I've added (TRX-TRY)/(TRX+TRY) to the DC DARM sweep plots, and it looks like an even better candidate. The slope is closer to linear, and it has a zero crossing within ~10pm of the true DARM zero across the different CARM offsets, so we might not even need to use an intentional DARM offset. 

dcDARMSweep-300.pdfdcDARMSweep-120.pdfdcDARMSweep-50.pdfdcDARMSweep-0.pdf

 

ELOG V3.1.3-