Photon pressure induced test mass deformation in gravitational-wave detectors

Details Photon pressure induced test mass deformation in gravitational-wave detectors Photon pressure induced test mass deformation in gravitational-wave detectors

2007-10-05

arxiv.org/abs/0710.1229v1

Class.Quant.Grav.24:5681-5688,2007

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

Scientific paper

10.1088/0264-9381/24/22/025

A widely used assumption within the gravitational-wave community has so far been that a test mass acts like a rigid body for frequencies in the detection band, i.e. for frequencies far below the first internal resonance. In this article we demonstrate that localized forces, applied for example by a photon pressure actuator, can result in a non-negligible elastic deformation of the test masses. For a photon pressure actuator setup used in the gravitational wave detector GEO600 we measured that this effect modifies the standard response function by 10% at 1 kHz and about 100% at 2.5 kHz.

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