Advantage of cryogenic interferometer (thermal noise of mirror) (1) Loss of substrate (i) Structure damping : f -1/2 Q=3*107 (fused silica)

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• Silicon dioxide
• Ceramic materials
• Elasticity
• Thermoelastic damping
• LCGT
• LIGO
• Damping
• Fused quartz
• Glass
• Chemistry
• Optical materials