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Arm cavity loss with maps
Test of one single FP cavity with maps
This configuration tests the round trip loss of an Advanced Virgo arm cavity in presence of imperfections. The imperfections are given as the 2D surface maps for both the ITM and ETM.
Results:
The loss is the round trip loss of the cavity eigenmode.
Simulated losses for different set maps:
| Set of maps | DarkF | FOG | OSCAR | SIESTA |
| A | 43.9 ppm | 42.2 ppm | 46.2 ppm | 43.2 ppm |
| B | 35.0 ppm | 33.8 ppm | 32.8 ppm | 34.3 ppm |
| C | 13.2 ppm | 12.8 ppm | 11.5 ppm | 11.9 ppm |
Configuration:
Number of points of the grid: 512 X 512
Size of the grid: 0.5 X 0.5 m
Diameter of the mirror: 0.33 m
RofC ITM: 1420 m
RofC ETM: 1683 m
Transmission ITM: 0.014
Transmission ETM: 1 ppm
Length of the cavity: 3000 m
Input beam is matched to the cavity
The maps can be downloaded here, 3 set of maps (A,B,C): Arm maps
(The maps are in meter and the size of one pixel is 7.8125E-4 m)
Update: OSCAR simulation files with maps and including pictures of the residual fields. To calculate the residual pictures, I took the circulating cavity field with maps, normalised it to 1W, then substract from it 1W of the perfect cavity field (radius = 0.0486792, wavefront RoC = -1420m). The files are there:OSCAR V3.13 with maps and pictures of the residual fields