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

S. Hild*, M. Brinkmann, K. Danzmann, H. Grote, M. Hewitson, J. Hough, H. Luck, I. Martin, K. Mossavi, N. Rainer, S. Reid, J.R. Smith, K. Strain, M. Weinert, P. Willems, B. Willke, W. Winkler

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review


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 paper, 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 GEO 600, we measured that this effect modifies the standard response function by 10% at 1 kHz and about 100% at 2.5 kHz.
Original languageEnglish
Pages (from-to)5681-5688
Number of pages8
JournalClassical and Quantum Gravity
Issue number22
Publication statusPublished - 21 Nov 2007
Externally publishedYes


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