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Entry  Thu Jul 17 00:38:30 2014, Jenne, Update, LSC, RIN in arm transmission TransRIN.pdf
    Reply  Sat Jul 19 17:36:44 2014, Jenne, Update, LSC, RIN in arm transmission TransSqrtInvRIN_vs_ALSsensing_18July2014.pngThorlabsRIN_16July2014.png
       Reply  Sat Jul 19 20:51:51 2014, Koji, Update, LSC, RIN in arm transmission 
          Reply  Wed Jul 23 02:01:15 2014, Jenne, Update, LSC, RIN in arm transmission - revised calibration TransSqrtInvRIN_vs_ALSsensing_18July2014.png
Message ID: 10258     Entry time: Wed Jul 23 02:01:15 2014     In reply to: 10242
Author: Jenne 
Type: Update 
Category: LSC 
Subject: RIN in arm transmission - revised calibration 

 

As Koji pointed out, I messed up the calibration.  However, fixing it doesn't change things that much.

From this calibration by Yuta, the Xarm ALS calibration is 54 deg / MHz, or 19.17 kHz / deg.  So, I multiply my data which is in these degree units by 19.17e3 to get Hz.  Then I use delta_f / f = delta_L / L to convert to meters.  f = c / lambda_green, and L = 37.5 meters. 

This only changes the calibration by about 10-15%.  It still looks like the ALS noise is well above the RIN level of the sqrtInv signal.

TransSqrtInvRIN_vs_ALSsensing_18July2014.png

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