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Entry  Fri Sep 4 04:05:51 2015, ericq, Update, LSC, DRMI locked on 1F and 3F 
    Reply  Fri Sep 4 15:20:31 2015, ericq, Update, LSC, Vertex Sensing PRFMI_ITM.pdfPRFMI_BS.pdfDRMI.pdfPRFPMI.pdf
    Reply  Fri Sep 4 20:06:23 2015, rana, Update, LSC, DRMI locked on 1F and 3F 
Message ID: 11577     Entry time: Fri Sep 4 15:20:31 2015     In reply to: 11571
Author: ericq 
Type: Update 
Category: LSC 
Subject: Vertex Sensing 

I've now made a collection of sensing matrix measurements. 

In all of the plots below, the radial scale is logarithmic, each grid line is a factor of 10. The units of the radial direction are calibrated into demod board output Volts per meter. The same radial scale is used on all plots and subplots.

I did two PRMI measurements: with MICH locked and excited with either the ITMS or the BS + PRM compensation. This tells us if our PRM compensation is working; I think it is indeed ok. I though I remembered that we came up with a number for the SRM compensation, but I haven't been able to find it yet. 

The CARM sensing int he PRFPMI measurement has the loop gain at the excitation frequency undone. All excitations were simultaneously notched out of all control filters, via the NotchSensMat filters. 

The angular scale is set to the analog I and Q signals; the dotted lines show the digitial phase rotation angle used at the time of measurement. 

Attachment 1: PRFMI_ITM.pdf  68 kB  | Hide | Hide all
Attachment 2: PRFMI_BS.pdf  69 kB  | Hide | Hide all
Attachment 3: DRMI.pdf  73 kB  | Hide | Hide all
Attachment 4: PRFPMI.pdf  76 kB  | Hide | Hide all
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