40m QIL Cryo_Lab CTN SUS_Lab TCS_Lab OMC_Lab CRIME_Lab FEA ENG_Labs OptContFac Mariner WBEEShop
  PSL  Not logged in ELOG logo
 List  |  Find  |  Login  |  Help 
Entry  Mon Sep 2 03:38:27 2013, tara, DailyProgress, NoiseBudget, beat zoom_beat_2013_09_02.pngbeat_2013_09_02.pngnb_short_cav.figzoom_beat_2013_09_02.png
    Reply  Tue Sep 3 09:52:17 2013, rana, DailyProgress, NoiseBudget, Seismic Noise Coupling 
       Reply  Wed Sep 4 18:40:00 2013, rana, DailyProgress, NoiseBudget, Seismic Noise Coupling 
    Reply  Sat Sep 7 04:29:32 2013, tara, DailyProgress, NoiseBudget, beat 
       Reply  Mon Sep 9 02:27:46 2013, tara, DailyProgress, NoiseBudget, RIN induced TO noise in beat 6x
          Reply  Mon Sep 9 21:19:24 2013, tara, DailyProgress, NoiseBudget, RIN induced TO noise in beat RIN_ACAV.pngRIN_ACAV.figbenid_ACAV.jpgfront_ACAV.jpg
             Reply  Tue Sep 10 04:53:34 2013, tara, DailyProgress, NoiseBudget, RIN induced TO noise in beat 
Message ID: 1332     Entry time: Tue Sep 10 04:53:34 2013     In reply to: 1331
Author: tara 
Type: DailyProgress 
Category: NoiseBudget 
Subject: RIN induced TO noise in beat 

The cause of the peaks around 1kHz in RIN is solved, PMC is the reason. After damping it, the peaks disappears.

Short notes from tonight measurement:

  • RIN in ACAV is better after PMC is damped, no peaks around 1kHz anymore.
  • The peaks in the beat measurement also disappear, so we really see photo thermal noise.
  • PD for RIN measurement behind RCAV is added, RIN is measured.
  • I Will add the effect from RIN and compare with beat measurement soon.

need to buy:

  •    new PBS for PDH locking. the one for RCAV is not good because there is an unwanted reflected beam going to the RFPD.
  •  other optics for EOAM for RCAV
ELOG V3.1.3-