Sorazu, B. , Strain, K.A. , Heng, I.S. and Kumar, R. (2010) Violin mode amplitude glitch monitor for the presence of excess noise on the monolithic silica suspensions of GEO 600. Classical and Quantum Gravity, 27(15), p. 155017. (doi: 10.1088/0264-9381/27/15/155017)
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Abstract
Non-Gaussian features of data from gravitational wave detectors are of interest as unpredictable 'glitches' limit the sensitivity of searches for many kinds of signal. We consider events due to non-random excitations of the test masses and their suspension fibres. These events could, for example, be related to acoustic emissions in the fibres due to the presence and propagation of cracks or another type of structural perturbation, and they would generate excess noise above the Gaussian background, which matches the level expected due to thermal noise. We look for excess noise in the fundamental violin modes of the monolithic silica suspension fibres of GEO 600. We describe the algorithm used to monitor the violin mode amplitude for glitches, present our results and consider how these may be applied to advanced detectors. The conclusion of our analysis is that no excess noise above what was considered to be thermal noise was observed for several days of h(t) data analysed at the frequency of the selected violin modes
| Item Type: | Articles |
|---|---|
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Kumar, Mr Rahul and Heng, Professor Ik Siong and Strain, Professor Kenneth and Sorazu Lucio, Dr Borja |
| Authors: | Sorazu, B., Strain, K.A., Heng, I.S., and Kumar, R. |
| College/School: | College of Science and Engineering > School of Physics and Astronomy |
| Research Centre: | College of Science and Engineering > School of Physics and Astronomy > Institute for Gravitational Research |
| Journal Name: | Classical and Quantum Gravity |
| Publisher: | Institute of Physics Publishing Ltd. |
| ISSN: | 0264-9381 |
| ISSN (Online): | 1361-6382 |
| Published Online: | 24 June 2010 |
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