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Advanced Virgo + parameters


See the OSD page for updated values

Test mass dimensions

Diameter [mm] 550
Thickness [mm] 200
Weight [kg] 105
The coating clear aperture will likely to be 530 mm in diameter.

Arm cavity configuration

Common parameters

Cavity length [m] 3000
finesse 450
Transmission IM 1.4%
Transmission EM 5 ppm
Round trip loss 75 ppm
Cavity circulating power 600 kW
That is the same parameters as Advanced Virgo, likely some optimisation will be done later on the finesse / recycling gain and hence the circulating power may be different.

Geometry for large beams on both mirrors

That is the official proposed configuration with larger beams on both input and end mirrors.

RoC _IM [m] 1378
Roc EM [m] 1635
Cavity g-factor 0.98
Beeam radius on IM [mm] 81
Beeam radius on EM [mm] 96

Geometry for large beam only on end mirror

That is an extreme case where the size of the end mirror is enlarged whereas the size on the input mirror is the same as we have now.

RoC _IM [m] 1030
Roc EM [m] 2002
Cavity g-factor 0.95
Beeam radius on IM [mm] 46
Beeam radius on EM [mm] 96
-- JeromeDegallaix - 30 May 2018
Topic revision: r2 - 15 Oct 2020, Heitmann
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