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  Thermal diagnostic of the optical window on board LISA Pathfinder

Nofrarias, M., Garcia Marin, A. F., Lobo, A., Heinzel, G., Ramos-Castro, J., Sanjuan, J., et al. (2007). Thermal diagnostic of the optical window on board LISA Pathfinder. Classical and Quantum Gravity, 24(20), 5103-5121. doi:10.1088/0264-9381/24/20/012.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0013-47AD-6 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0013-47AE-4
Genre: Journal Article

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 Creators:
Nofrarias, Miquel1, Author              
Garcia Marin, A. F.1, Author              
Lobo, Alberto, Author
Heinzel, Gerhard1, Author              
Ramos-Castro, J., Author
Sanjuan, J., Author
Danzmann, Karsten1, Author              
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1Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society, ou_24010              

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 Abstract: Vacuum conditions inside the LTP Gravitational Reference Sensor must comply with rather demanding requirements. The Optical Window (OW) is an interface which seals the vacuum enclosure and, at the same time, lets the laser beam go through for interferometric Metrology with the test masses. The OW is a plane-parallel plate clamped in a Titanium flange, and is considerably sensitive to thermal and stress fluctuations. It is critical for the required precision measurements, hence its temperature will be carefully monitored in flight. This paper reports on the results of a series of OW characterisation laboratory runs, intended to study its response to selected thermal signals, as well as their fit to numerical models, and the meaning of the latter. We find that a single pole ARMA transfer function provides a consistent approximation to the OW response to thermal excitations, and derive a relationship with the physical processes taking place in the OW. We also show how system noise reduction can be accomplished by means of that transfer function.

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 Dates: 2007-10-21
 Publication Status: Published in print
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 Identifiers: eDoc: 335031
ISI: 000249987800013
Other: arXiv:0709.0442
DOI: 10.1088/0264-9381/24/20/012
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Title: Classical and Quantum Gravity
Source Genre: Journal
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Pages: - Volume / Issue: 24 (20) Sequence Number: - Start / End Page: 5103 - 5121 Identifier: ISSN: 0264-9381