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
Message ID: 341     Entry time: Fri Sep 3 01:45:54 2010
Author: tara 
Type: Summary 
Category: Laser 
Subject: RIN comparison between PMC and RCAV 

 When both cavities are locked, I measured

1) power fluctuation behind ACAV (DC@0.55V) and RCAV (DC@2.2V)

2) power fluctuation behind PMC (DC@3.17V)and RCAV (DC@2.2V)

the HEPA filter was on, the SLOWDC loop was engaged.

SR785 is set to AC couple mode, auto range on both channels.

 

The level of RIN from RCAV from two measurements are a bit different,see fig2.

RIN from ACAV is not significantly higher than that of RCAV. This is good news, I thought AOM might pose more pointing instability to the system.

Attachment 1: all_compare.png  32 kB  | Hide | Hide all
all_compare.png
Attachment 2: RCAV_compare_.png  24 kB  Uploaded Fri Sep 3 02:46:08 2010  | Hide | Hide all
RCAV_compare_.png
ELOG V3.1.3-