Use this URL to cite or link to this record in EThOS: https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.725677
Title: A prototype system for gravitational wave data analysis
Author: Watkins, William John
Awarding Body: Cardiff University
Current Institution: Cardiff University
Date of Award: 1991
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Abstract:
This thesis is concerned with a prototype gravitational wave data analysis system. Work will shortly be underway on the construction of large scale broad-band laser interferometers that should produce data containing gravitational waves. Subsequently, systems that can analyse this data, extracting any waves within the noise, need to be developed now. The prototype system described in this thesis is the first fully automated gravitational wave data analysis system to be developed. It is designed in parallel, to run on several processors simultaneously, as future systems are certain to employ parallelism to some degree. This thesis is also concerned with the analysis of actual data by this system, produced by the prototype interferometer owned and operated by the University of Glasgow. The software is described in detail, beginning with a description of the parallelism within the sys­tem. The procedure employed to split the multiplexed data into its constituent streams is discussed followed by a description of the methods employed to optimise the detector noise for the extraction of possible signals from short duration gravitational wave bursts. This is followed by a description of both the statistical analysis and the search for events carried out on the calibrated and optimally weighted interferometer stream. This search looks for wideband burst events in the time series and also coalescing binary signals found by cross-correlating the noise with a bank of templates. An account of the results of the analysis is given, concentrating on the statistics of detector noise, identifying its main characteristics both when the detector is operating properly and also when the housekeeping data suggests it is not. A description is given of a parameter, easily calculated from the noise, that is shown to be a good diagnostic indicator of the state of the detector. The distribution of events found by the analysis is discussed, and it is shown how the number of events vary with the state of the detector.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID: uk.bl.ethos.725677  DOI: Not available
Keywords: QC Physics
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