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Entry  Thu Aug 23 12:17:39 2012, Manasa, Update, , IMC Ringdown mozilla.pdfMC_sus.pdf
    Reply  Thu Aug 23 15:35:33 2012, rana, Update, , IMC Ringdown 
       Reply  Thu Aug 23 17:51:25 2012, Manasa, Update, , IMC Ringdown 
Message ID: 7256     Entry time: Thu Aug 23 12:17:39 2012     Reply to this: 7257
Author: Manasa 
Type: Update 
Subject: IMC Ringdown 

The ringdown measurements are in progress. But it seems that the MC mirrors are getting kicked everytime the cavity is unlocked by either changing the frequency at the MC servo or by shutting down the input to the MC. This means what we've been observing is not the ringdown of the IMC alone. Attached are MC sus sensor data and the observed ringdown on the oscilloscope.  I think we need to find a way to unlock the cavity without the mirrors getting kicked....in which case we should think about including an AOM or using a fast shutter before the IMC.

P.S. The origin of the ripples at the end of the ringdown still are of unknown origin. As of now, I don't think it is because of the mirrors moving but something else that should figured out.

Attachment 1: mozilla.pdf  31 kB  | Hide | Hide all
Attachment 2: MC_sus.pdf  177 kB  | Hide | Hide all
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