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 Jul 25 15:33:55 2012, janosch, Update, LSC, ringdown measurement Rindown1.png
    Reply  Wed Jul 25 16:31:01 2012, Jenne, Update, LSC, Yarm green locking to arm - PDH box saturating 
    Reply  Wed Jul 25 22:16:36 2012, Koji, Update, LSC, ringdown measurement 
Message ID: 7033     Entry time: Wed Jul 25 22:16:36 2012     In reply to: 7029
Author: Koji 
Type: Update 
Category: LSC 
Subject: ringdown measurement 

Is this the step response of the single pole low pass???
It should have an exponential decay, shouldn't it? So it should be easier to comprehend the result with a log scale for vertical axis...

I think you need a fast shutter. It is not necessary to be an actual shutter but you can use faster thing
which can shut the light. Like PMC or IMC actuators.

Another point is that you may like to have a witness channel like the MC transmission to subtract other effect.

ELOG V3.1.3-