Reduction of thermal fluctuations in a cryogenic laser interferometric gravitational wave detector.
Phys Rev Lett
; 108(14): 141101, 2012 Apr 06.
Article
en En
| MEDLINE
| ID: mdl-22540781
ABSTRACT
The thermal fluctuation of mirror surfaces is the fundamental limitation for interferometric gravitational wave (GW) detectors. Here, we experimentally demonstrate for the first time a reduction in a mirror's thermal fluctuation in a GW detector with sapphire mirrors from the Cryogenic Laser Interferometer Observatory at 17 and 18 K. The detector sensitivity, which was limited by the mirror's thermal fluctuation at room temperature, was improved in the frequency range of 90 to 240 Hz by cooling the mirrors. The improved sensitivity reached a maximum of 2.2×10(-19) m/âHz at 165 Hz.
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MEDLINE
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En
Revista:
Phys Rev Lett
Año:
2012
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Article
País de afiliación:
Japón