This page is a summary of IFO Simulation Results using SIS. All of the codes to run the simulations are in the SVN in SIS/40m/.
Table of Contents
Contents
What is SIS?
Static Interferometer Simulation. FFT based field simulation written by Hiro Yamamoto. Manual is in the DCC.
Results
X Arm
So far, just using the ITM04 HR phase map:
The result is that the diffractive loss is ~0.5 ppm. The total scatter loss is ~4 ppm. So why do we see more like 100 ppm???
This is the 'summary' dump from SIS: {{{cavity length = 5.4156153590591e-08 = 5.4304550698212e-08(delL) - 0(ITMz) - 1.4839710762035e-10(ETMz) power in cavity = 286.27328293106, reflected power = 0.99517823839521, leakPower / Power00 = 0.99517823839521 / 0.99484788138773 Diffractive loss = 0.47823454052409, total loss = 4.3779597155291
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- FP cavity modal analysis using cold optics parameters
ROC(ITM) = 51380, ROC(ETM) = 59.5, Cavity lenggth = 38.49999944, total Gouy = 0.93494098230936 Fval(ITM) = -72926.229047965, OPL(ITM) = 0.13793033055886, Fval(ETM) = -132.22222240828 waist size = 0.0031035077771509, waist position from ITM = 0.015741056390046, Rayleigh range = 28.438973777894
Mode parameters of cavity fields ETM AR (out base) : w = 0.005222025 R = 41.03448 z = 32.57398 z0 = 16.60097 w0 = 0.00237117
- (out fit ) : (wX,wY)=(0.0052492, 0.0052239) R(x/y) = ( 41.0516 , 41.0391 ) (x0,y0)=(-3.726e-05 , -2.148e-05 ) power / HMfrac = 0.003921942 / 0.0001241
ETM HR (in base) : w = 0.005222025 R = 59.5 z = 38.48426 z0 = 28.43897 w0 = 0.003103508
- (in fit ) : (wX,wY)=(0.0052492, 0.0052239) R(x/y) = ( 59.536 , 59.5097 ) (x0,y0)=(-3.726e-05 , -2.148e-05 ) power / HMfrac = 286.2733 / 0.0001246 (out fit ) : (wX,wY)=(0.0052492, 0.0052239) R(x/y) = (-59.46404, -59.4903 ) (x0,y0)=( 3.726e-05 , -2.148e-05 ) power / HMfrac = 286.2692 / 0.0001241
ITM HR (in base) : w = 0.003103508 R = 51380 z = 0.01574106 z0 = 28.43897 w0 = 0.003103508
- (in fit ) : (wX,wY)=(0.0030993, 0.0030999) R(x/y) = ( 12379.77, -52095.86) (x0,y0)=( 1.259e-05 , -4.653e-06 ) power / HMfrac = 286.2692 / 0.0001241 (out fit ) : (wX,wY)=( 0.00311, 0.003098) R(x/y) = (-11311.5 , 23681.52) (x0,y0)=(-1.265e-05 , -4.294e-06 ) power / HMfrac = 286.2733 / 0.0001246
ITM AR (in base) : w = 0.003103508 R = -35434.48 z = -0.02282452 z0 = 28.43896 w0 = 0.003103507
- (in fit ) : w = 0.003103508 R = -35434.48 (x0,y0)=( 0 , 0 ) power / HMfrac = 1 / 3.331e-16 (out fit ) : (wX,wY)=(0.0031169, 0.0030926) R(x/y) = (-72641.21, 23808.33) (x0,y0)=( 2.534e-05 , -8.628e-06 ) power / HMfrac = 0.9951782 / 0.000332
}}}