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Entry  Wed Sep 12 19:26:08 2012, Rijuparna Chakraborty, Update, , cavitymode scan 7x
    Reply  Thu Sep 13 07:36:41 2012, Steve, Update, General, restore conditions 
Message ID: 7376     Entry time: Wed Sep 12 19:26:08 2012     Reply to this: 7378
Author: Rijuparna Chakraborty 
Type: Update 
Category:  
Subject: cavitymode scan 

 Summary: Recorded the presence of higher order modes in IMC

What I did: Misaligned the flat mirror MC1 by small amount in both pitch and yaw (it was needed to be done cause at the beginning of the experiment no higher order modes were present)  and scanned the cavity for frequency-range 32MHz to 45MHz.

I found the presence of higher order modes around 36.7MHz (1st order)  and 40.6MHz (2nd order) along with two other strong modes near 35MHz and 42.5MHz.

 

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