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Entry  Mon Mar 12 01:04:18 2012, keiko, Update, LSC, RAM simulation update, RAM LSC matrix 
    Reply  Mon Mar 12 18:57:58 2012, keiko, Update, LSC, RAM simulation update, RAM LSC matrix 
       Reply  Wed Mar 14 16:33:20 2012, keiko, Update, LSC, RAM simulation / RAM pollution plot Mar14pollution.pngRAMexampleplot.png
Message ID: 6400     Entry time: Mon Mar 12 01:04:18 2012     Reply to this: 6401
Author: keiko 
Type: Update 
Category: LSC 
Subject: RAM simulation update, RAM LSC matrix 

 I calculated the DRMI RAM LSC matrix with RAM and the operation point offsets.

  • configuration: C1 DRMI
  • RAM is added by an Mach-Zehnder ifo placed before the PRM
  • demodulation phases are optimised for each DoF
  • the operation points offset from the PDH signals are calculated and added to the optical configuration as mirror position offsets
  • Then the matrix is calculated with the offsets and the RAM
  • The set of the scrips are found as RAMmatrix.m, normMAT.m, newGetMAT.m,  on CVS/ifomodeling/40m/fullIFO_Optickle. They are a bit messy scripts at this moment.

Results:

(1) No RAM LSC matrix

  PRCL MICH SRCL
REFL11I 1 -0.001806 -0.000147
AS 55Q 0.000818 1 0.000474
AS 55 I 1.064561 902.292816 1

(2) With 1% RAM mod index of PM (normalised by (1) )

  PRCL MICH SRCL
REFL11I 1.000618 -0.001837 -0.000163
AS 55Q 0.000919 1.000521 0.000495
AS 55 I 1.169741 924.675187 1.018479
 

(3) With 5% RAM mod index of PM (normalised by (1) )

  PRCL MICH SRCL
REFL11I 0.999986 -0.001812 -0.000150
AS 55Q 0.000838 1.000028 0.000479
AS 55 I 1.084598 906.83668 1.003759
 

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