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Message ID: 1406     Entry time: Thu Apr 28 15:00:14 2011
Author: Alastair 
Type: Laser 
Category: GYRO 
Subject: Moving Faraday... 

More mis-alignment tests to start with today.

I moved the faraday for the return CCW beam (the ingoing CW beam) an un-calibrated-small-amount to the side (about 1mm).  The transmission through the cavity gets worse (from 720mV down to 400mV DC on the trans PD).  The noise hump at low frequency gets worse by a factor of 2.

This test is really a precursor to trying to move the faraday back to where the waist is in the mode matching telescope in order to reduce the clipping.

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move_faraday.pdf
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