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 Oct 28 14:07:28 2014, Koji, Update, IOO, IMC WFS sensing matrix measurement 00.png
    Reply  Tue Oct 28 15:27:25 2014, ericq, Update, IOO, IMC WFS sensing matrix measurement 45.png
Message ID: 10646     Entry time: Tue Oct 28 14:07:28 2014     Reply to this: 10647
Author: Koji 
Type: Update 
Category: IOO 
Subject: IMC WFS sensing matrix measurement 

Last night the sensing matrix for IMC WFS&QPD were measured.

C1:IOO-MC(1, 2, 3)_(ASCPIT, ASCYAW)_EXC were excited at 5.01Hz with 100 count
The output of the WFS1/WFS2/QPD were measured. They all looked well responding
i.e. Pitch motion shows pitch error signals, Yaw motion shows yaw error signals.

The below is the transfer function from each suspension to the error signals

MC1P      MC2P     MC3P
-3.16e-4  1.14e-2  4.62e-3 -> WFS1P
 5.43e-3  8.22e-3 -2.79e-3 -> WFS2P
-4.03e-5 -3.98e-5 -3.94e-5 -> QPDP

MC1Y      MC2Y     MC3Y
-6.17e-4  6.03e-4  1.45e-4 -> WFS1Y
-2.43e-4  4.57e-3 -2.16e-3 -> WFS2Y
 7.08e-7  2.40e-6  1.32e-6 -> QPDY

Taking the inverse of these matrices, the scale was adjusted so that the dc response.

Attachment 1: 00.png  98 kB  Uploaded Tue Oct 28 15:10:48 2014  | Show | Show all
ELOG V3.1.3-