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 Sep 5 19:29:45 2012, Jenne, Update, General, Yarm aligned to IR incident beam 
    Reply  Thu Sep 6 02:51:47 2012, Koji, Update, General, Green beam roughtly aligned (Re: Yarm aligned to IR incident beam) green_y.png
       Reply  Thu Sep 6 10:57:27 2012, Jenne, Update, General, Forgot to turn green refl pd back on 
Message ID: 7347     Entry time: Thu Sep 6 02:51:47 2012     In reply to: 7346     Reply to this: 7348
Author: Koji 
Type: Update 
Category: General 
Subject: Green beam roughtly aligned (Re: Yarm aligned to IR incident beam) 

The Y-End green beam was roughly aligned by the steering mirrors for the green beam.

I couldn't understand the Y-End green setup as the PD was turned off and the sign of the servo was flipped. Once they are fixed, I could lock the cavity with the green beams.

After a long alignment session, TEM00 was found. The alignment of the green beam has not been optimized.

Looking at the spot position at ETMY OSEM holders (not by the ccd image), it seems that the cavity mode is not at the center of the mirrors.

Quote:

[EricQ, Jenne, brains of other people]

Get green spots co-located with IR spots on ETMs, ITMs, check path of leakage through the arms, make sure both greens get out to PSL table

 

Attachment 1: green_y.png  33 kB  | Hide | Hide all
green_y.png
ELOG V3.1.3-