Power recycled Michelson with arm cavities
Benchmark tests for the first phase of Advanced Virgo (i.e. without signal recycling)
That is the configuration of the Advanced Virgo from the end of 2015 up to 2017. For the simulations, we will look at three main quantities: the circulating power in the power recycling cavity (PPRC), the circulating power in the arm cavities (Parm), and the DC power at the dark port (PDP).
We do not include the sidebands since this case has already been take care previously (see here).
The numbers given in table are all in W for 1W of input power.
The perfect case
With the nominal parameters, no defect.
Package | DarkF | FOG | OSCAR |
PPRC | 36.9 | 36.9 | |
Parm | 5175 | 5173 | |
PDP | 1E-6 | 1E-6 |
One end mirror HR RoC wrong
Now RoC EM = 1690m (instead of 1683m)
Package | DarkF | FOG | OSCAR |
PPRC | 36.6 | 36.6 | |
Parm | 5134 | 5131 | |
PDP | 0.01 | 0.01 |
Same time with DarkF.
One input mirror HR RoC wrong
Now RoC IM HR = 1430m (instead of 1420m)
Package | DarkF | FOG | OSCAR |
PPRC | 36.5 | 36.6 | |
Parm | 5120 | 5135 | |
PDP | 0.01 | 0.01 |
Same time with DarkF.
One input mirror AR RoC wrong
Now RoC IM AR = 1430m (instead of 1420m)
Package | DarkF | FOG | OSCAR |
PPRC | 36.9 | 36.9 | |
Parm | 5175 | 5173 | |
PDP | 1E-6 | 1E-6 |
PRM HR RoC wrong
Now RoC PRM HR = 1440m (instead of 1430m)
Package | DarkF | FOG | OSCAR |
PPRC | 36.8 | 36.8 | |
Parm | 5174 | 5152 | |
PDP | 8.3E-7 | 8.5E-7 |
BS reflectivity imperfect
Reflection of the BS toward the West arm is 51% (instead of 50%), transmission in that case is 49% (no loss)
Package | DarkF | FOG | OSCAR |
PPRC | 36.9 | 36.9 | |
Parm | 5279 5072 | 5276 5269 | |
PDP | 1E-6 | 1E-6 |
Imbalance loss in the arms
The round trip loss in the West arm is now 150 ppm instead of the usual 75 ppm.
Package | DarkF | FOG | OSCAR |
PPRC | 29.9 | 28.4 | |
Parm | 4149 4193 | 3950 3992 | |
PDP | 8.2E-4 | 7.8E-4 |
Configuration
Number of points of the grid: 128 X 128
Size of the grid: 0.4 X 0.4 m
Diameter of the mirrors: 0.33 m (BS perfect and very large)Arm cavity parameters can be found here, PRC parameters are there. POP and CP not included, set the PRC round trip loss to 2000 ppm.