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Entry  Tue Dec 10 15:17:17 2019, Yehonathan, Update, PSL, PMC is locked 
    Reply  Tue Dec 10 18:27:22 2019, Yehonathan, Update, PSL, PMC is locked 
       Reply  Wed Dec 11 15:29:17 2019, Yehonathan, Update, PSL, PMC is locked 
Message ID: 15092     Entry time: Tue Dec 10 18:27:22 2019     In reply to: 15091     Reply to this: 15094
Author: Yehonathan 
Type: Update 
Category: PSL 
Subject: PMC is locked 

{Yehonathan, Jon}

We are able to lock the PMC on the TEM00 mode of the deflected beam.

However when we turn off the driving voltage to the AOM and back on the lock is not restored. It get stuck on some higher order mode.

There are plethora of modes present when the PZT is scanned, which makes us believe the cavity is misaligned.

 

To lock again on the TEM00 mode again we disconnect the loop (FP Test point 1), find a TEM00 mode using the DC output adjust and close the loop again.

 

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