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Entry  Thu May 5 13:55:08 2011, kiwamu, Update, LSC, MI locking : calibration of BS and ITMs actuators MICH_OL.png
    Reply  Thu May 5 14:40:14 2011, Koji, Update, LSC, MI locking : calibration of BS and ITMs actuators 
       Reply  Thu May 5 15:28:23 2011, kiwamu, Update, LSC, Re: MI locking : calibration of BS and ITMs actuators 
Message ID: 4639     Entry time: Thu May 5 14:40:14 2011     In reply to: 4638     Reply to this: 4643
Author: Koji 
Type: Update 
Category: LSC 
Subject: MI locking : calibration of BS and ITMs actuators 

I've got confused

1) Are these the DC responses of the coils? If that is true, we need to specify the resonant frequency of each suspension to get the AC response.

2) Are these the AC responses well above the resonant freqs? In that case, The responses should be x.xxx / f^2 [m/counts]

Quote:

The open loop transfer functions of the Michelson locking have been measured.

The purpose of this excise is to calibrate the coil-magnet actuators on BS and ITMs.

The estimated actuation coefficients are :

 BS = 3.69e-08 [m/counts]
 ITMX = 8.89e-09 [m/counts]
 ITMY = 9.22e-09 [m/counts]

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