40m QIL Cryo_Lab CTN SUS_Lab TCS_Lab OMC_Lab CRIME_Lab FEA ENG_Labs OptContFac Mariner WBEEShop
  40m Log  Not logged in ELOG logo
Entry  Wed May 26 00:50:16 2010, Jenne, Update, IOO, Mirrors moved in prep for round 2 of MC mode measuring 
    Reply  Wed May 26 14:28:01 2010, Koji, Update, IOO, Mirrors moved in prep for round 2 of MC mode measuring 
       Reply  Wed May 26 15:34:00 2010, Jenne, Update, IOO, Mirrors moved in prep for round 2 of MC mode measuring 
Message ID: 2991     Entry time: Wed May 26 14:28:01 2010     In reply to: 2987     Reply to this: 2993
Author: Koji 
Type: Update 
Category: IOO 
Subject: Mirrors moved in prep for round 2 of MC mode measuring 

That's true. But I thought that you measured the mode after those optics and the effect of them is already included.

So:

  • We need to model the transmissive optics in order to understand the measured mode which is different from the MC mode slightly.
  • We just can calculate the modes based on the measurement in order to figure out the realistic positions of the MMT1 and MMT2.

Quote:

Rana pointed out that the anticipated mode calculation should be modified to include the index of refraction of the crystals in the Faraday, and the polarizers in the Faraday.  This may affect where we should put MMT1, and so this should be completed before round 2 measurements are taken, so that we can move MMT1.

 

ELOG V3.1.3-