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
Message ID: 10399     Entry time: Fri Aug 15 02:05:55 2014
Author: Jenne 
Type: Update 
Category: LSC 
Subject: ALS in-loop spectra 

 Not sure why, but Rana and I didn't see the super high Xarm noise with ALS that we reported last night (elog 10382).  

The in-loop ALS noise seems fine.  The out of loop measurement while the ALS is locked is a little tricky, since ALS hold the arms within the POX/POY linear ranges.  

Here is the in-loop noise:

ALS_XY_inloop_noise_14Aug2014_lowBeatFreq.pdf

ELOG V3.1.3-