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  Tue Jan 29 19:50:49 2013, Jenne, Update, Locking, Better POP layout, no extra PRM motion with locked cavity HalfPRCL_PRM-flatMirror_RefsAreLocked_OthersUnlocked.pdfHalfPRCL_PRM-flatMirror_RefsAreLocked_OthersUnlocked.png
    Reply  Tue Jan 29 21:07:48 2013, Jenne, Update, Locking, PRM coils need diagonalizing 
       Reply  Wed Jan 30 19:34:17 2013, Jenne, Update, Locking, PRM coils need diagonalizing 
    Reply  Wed Jan 30 19:30:21 2013, Jenne, Update, Locking, POP in-vac improved HalfPRCL_PRM-flatMirror_POPtrans_30Jan2013.jpg
Message ID: 7969     Entry time: Wed Jan 30 19:34:17 2013     In reply to: 7959
Author: Jenne 
Type: Update 
Category: Locking 
Subject: PRM coils need diagonalizing 

[Koji, Jamie, Jenne]

Koji did this, while we actuated on PRM in pos, and watched the oplev.  Empirically, he found the following values for the POS column of the output matrix:

UL = 1.020

UR = 0.990

LL = 1.000

LR = 0.970

SD = 0.000

(The nominal values are all +1, except for Side, which is 0). 

Actuation of PRM was through C1:SUS-PRM_LSC_EXC, f=0.1Hz, A=100 counts.

 

Ed by KA:
This means UL and UR are increased by 2% and UR and LR are decreased by 3%. More precisely UR should be 1.02*0.97.
This is just a quick hack which works only for the DC.

ELOG V3.1.3-