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Entry  Fri Feb 27 03:48:29 2015, Jenne, Update, LSC, PRMI locked during CARM scan REFL33Lock.pngREFL165Lock.png
    Reply  Fri Feb 27 21:16:10 2015, Jenne, Update, LSC, PRMI locked during CARM scan 8x
Message ID: 11086     Entry time: Fri Feb 27 21:16:10 2015     In reply to: 11082
Author: Jenne 
Type: Update 
Category: LSC 
Subject: PRMI locked during CARM scan 

Here are a bunch of PDFs of time series from last night's CARM sweeps.  The y-axes are all calibrated (except for the TRX/TRY, which are just normalized to single arm power, as usual) to real units - meters for the error signals, and Newtons for the control signals.  The y-axes for each plot are the same on all PDFs (ex, the control signal plot in the lower left has the same range for all cases) so that it is easy to compare directly. 

The most striking thing is that while the PRMI is held on REFL33, the MICH control signal saturates as we go through arm resonance.  If the PRMI is held on REFL165, there is no such problem.  I think we're going to have a lot more luck keeping the PRMI on REFL 165.


Plots while held on REFL 33:

REFL33lock_431.pdf

REFL33lock_516.pdf

REFL33lock_605.pdf

REFL33lock_648.pdf


Plots while held on REFL 165:

REFL165lock_835.pdf

REFL165lock_877.pdf

REFL165lock_912.pdf

REFL165lock_940.pdf

 

Attachment 1: REFL33lock_431.pdf  139 kB  | Hide | Hide all
REFL33lock_431.pdf
Attachment 2: REFL33lock_516.pdf  140 kB  | Hide | Hide all
REFL33lock_516.pdf
Attachment 3: REFL33lock_605.pdf  139 kB  | Hide | Hide all
REFL33lock_605.pdf
Attachment 4: REFL33lock_648.pdf  140 kB  | Hide | Hide all
REFL33lock_648.pdf
Attachment 5: REFL165lock_835.pdf  152 kB  | Hide | Hide all
REFL165lock_835.pdf
Attachment 6: REFL165lock_877.pdf  152 kB  | Hide | Hide all
REFL165lock_877.pdf
Attachment 7: REFL165lock_912.pdf  153 kB  | Hide | Hide all
REFL165lock_912.pdf
Attachment 8: REFL165lock_940.pdf  150 kB  | Hide | Hide all
REFL165lock_940.pdf
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