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Entry  Mon Mar 26 23:47:54 2012, Suresh, Update, IOO, Beam Profile measurement: IPPOS beam BeamProfile_IPPOS.pngBeamProfile_IPPOS.pdfBeamProfileData_IPPOS.xlsx
    Reply  Tue Mar 27 02:05:40 2012, Suresh, Update, IOO, Beam Profile measurement: IPPOS beam BeamProfile_IPPOS.pngBeamProfile_IPPOS.png
       Reply  Tue Mar 27 11:54:18 2012, Jenne, Update, IOO, Beam Profile measurement: IPPOS beam IPPOS_distances.pdf
          Reply  Tue Mar 27 18:03:46 2012, Jenne, Update, IOO, Beam Profile measurement: IPPOS beam BeamProp_usingMeas2012MMTnumbersLowRes.png
             Reply  Tue Mar 27 21:20:32 2012, Jenne, Update, IOO, Beam Profile measurement: IPPOS beam BeamProp_usingMeas2012MMTnumbersLowRes.png
                Reply  Tue Mar 27 23:37:35 2012, Suresh, Update, IOO, Beam Profile measurement: IPPOS beam Beam-Profile_IPPOS_wError.png
                Reply  Wed Mar 28 01:17:29 2012, Jenne, Update, IOO, Beam Profile measurement: IPPOS beam BetterDistances_IPPOSLowRes.pngBetterDistances_MainIFO_PRMnormalLowRes.pngBetterDistances_MainIFO_PRMflippedLowRes.png
                   Reply  Wed Mar 28 18:26:47 2012, Jenne, Update, IOO, Beam Profile measurement: IPPOS beam OptimizedMMT_halfMeterChange_IPPOSviewLowRes.pngOptimizedMMT_halfMeterChange_IFOviewLowRes.pngOptimizedMMT_pt2cMeterChange_IPPOSviewLowRes.pngOptimizedMMT_pt2cMeterChange_IFOviewLowRes.png
                      Reply  Wed Mar 28 20:54:02 2012, Jenne, Update, IOO, Beam Profile measurement: IPPOS beam MMT_moved_by_1pt3meters_MMT1th_25_MMT2th_12_LowRes.pngMMT_moved_by_1pt3meters_MMT1th_25_MMT2th_12_LowRes.png
                         Reply  Mon Apr 2 18:58:32 2012, Jenne, Update, IOO, Beam Profile measurement: IPPOS beam NonOptimized_propagatedWaistPlotted_LowRes.png
                         Reply  Mon Apr 2 23:06:38 2012, Suresh, Update, IOO, Beam Profile measurement: IPPOS beam: Mystery deepens 40mOpticsLocations.pdfBeam-Profile_IPPOS_wError.pdfBeam-Profile_PRM_1_wError.pdf
       Reply  Tue Mar 27 17:19:02 2012, Koji, Update, IOO, Beam Profile measurement: IPPOS beam 
    Reply  Tue Mar 27 02:18:31 2012, keiko, Update, IOO, Beam Profile measurement: IPPOS beam text9149.pngfirst_cap.pngsecond_cap.pngtext9149.png
       Reply  Tue Mar 27 16:06:59 2012, keiko, Update, IOO, Beam Profile measurement: IPPOS beam 
Message ID: 6457     Entry time: Tue Mar 27 21:20:32 2012     In reply to: 6456     Reply to this: 6459   6460
Author: Jenne 
Type: Update 
Category: IOO 
Subject: Beam Profile measurement: IPPOS beam 

Quote:

The moral of the story that I'm getting from this plot:  something funny is going on.

 Yup, something funny was going on.  Nic's MM code that I used, "a la mode", calls for the focal length of the optics, whereas the code that I wrote and used for ages called for the radius of curvature.  f = R/2.  Fixing that factor of 2 I get something more like:

BeamProp_usingMeas2012MMTnumbersLowRes.png

This is obviously much better, in that the beam profile goes through (within some error) both of the measured sets of points - the MC waist measured in May 2010, and after the MMT measured yesterday.

So, what does it all mean?  That I'm not sure of yet.

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