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Baffle material characterization for Advanced LIGO

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dc.contributor.advisor Nergis Mavalvala. en_US Hunt, Cassandra R en_US
dc.contributor.other Massachusetts Institute of Technology. Dept. of Physics. en_US 2009-03-16T19:47:34Z 2009-03-16T19:47:34Z 2008 en_US 2008 en_US
dc.description Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Physics, 2008. en_US
dc.description Includes bibliographical references (p. 43-45). en_US
dc.description.abstract The transition to Advanced LIGO introduces new sensitivity requirements for the LIGO interferometers. When light scatters away from the main laser beam, then scatters off the beam tube and returns to the main beam, noise is introduced into the phase of the laser. The Auxiliary Optics Support subsystem uses baffles and beam dumps to control this scatter, but the baffle material and shape contribute some scatter as well. Careful selection of baffle material for Advanced LIGO is necessary in order to minimize baffle backscatter. Characterization of potential materials will also inform the geometry and placement of baffles. To this end, I developed a scatterometer experiment designed to measure the Bidirectional Reflectance Distribution Function (BRDF) of a material. The arrangement was used to measure the BRDF for black welder's glass, the prime candidate material for baffles in Advanced LIGO. I found that black glass has a BRDF on the order of 10-, putting it within sensitivity requirements. en_US
dc.description.statementofresponsibility by Cassandra R. Hunt. en_US
dc.format.extent 45 p. en_US
dc.language.iso eng en_US
dc.publisher Massachusetts Institute of Technology en_US
dc.rights M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission. en_US
dc.rights.uri en_US
dc.subject Physics. en_US
dc.title Baffle material characterization for Advanced LIGO en_US
dc.title.alternative Baffle material characterization for Advanced Laser Interferometer Gravitational-Wave Observatory en_US
dc.type Thesis en_US S.B. en_US
dc.contributor.department Massachusetts Institute of Technology. Dept. of Physics. en_US
dc.identifier.oclc 301560616 en_US

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