publication . Article . Other literature type . Conference object . 2008

High mechanical Q-factor measurements on silicon bulk samples

Nawrodt, R.; Zimmer, A.; Koettig, T.; Schwarz, C.; Heinert, D.; Hudl, M.; Neubert, R.; Thürk, M.; Nietzsche, S.; Vodel, W.; ...
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  • Published: 01 Jul 2008 Journal: Journal of Physics: Conference Series, volume 122, page 12,008 (eissn: 1742-6596, Copyright policy)
  • Publisher: IOP Publishing
  • Country: Germany
Abstract
Future gravitational wave detectors will be limited by different kinds of noise. Thermal noise from the coatings and the substrate material will be a serious noise contribution within the detection band of these detectors. Cooling and the use of a high mechanical Q-factor material as a substrate material will reduce the thermal noise contribution from the substrates. Silicon is one of the most interesting materials for a third generation cryogenic detector. Due to the fact that the coefficient of thermal expansion vanishes at 18 and f 25 K the thermoelastic contribution to the thermal noise will disappear. We present a systematic analysis of the mechanical Q-fac...
Subjects
free text keywords: Cryostat, Noise (electronics), Q factor, Composite material, Silicon, chemistry.chemical_element, chemistry, Tungsten, Materials science, Thermal expansion, Thermoelastic damping, Electronic engineering, Substrate (chemistry)
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