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Message ID: 2084     Entry time: Fri Feb 9 18:36:40 2018
Author: awade, Craig 
Type: DailyProgress 
Category: scatter 
Subject: Scatter dumping around FSS reflection PDs 

I reinstalled the green glass dump in the north cavity FSS REFL PD prompt reflection path.  For some reason this was removed and a razor blade dump was in use instead.

The south FSS reflection PD was reangled the from 40 deg to 30 deg incidence.  The  polarization incident on the detector was flipped from s-pol to p-pol using a lambda/2 wave plate.  I installed a green glass dump to capture the prompt reflection from the PD. 

Looking at the output of the south Faraday reflection port there are two additional dots that are not coming from the cavity.  They appear to be either coming from inside the Faraday or from on of the optics immediately after (maybe the half-wave plate). We need to check the source of these DC fields.

A stitched beat note spectrum will be posted presently.

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Attachment 2: 20180209_NorthReflectionPDWtDumping.JPG  2.482 MB  | Hide | Hide all
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