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'''Suspension Thermal noise''' ## page was renamed from CLIO/NoiseBudgets/SuspensionThermalNoise
## page was renamed from CLIO/Technicals/SuspensionThermalNoise
## page was renamed from CLIO/data/SuspensionThermalNoise
= Suspension Thermal noise for CLIO 081105 =

 [[attachment:sus_thermal.txt]]
 '''
 fo = 0.7 Hz,
 Q = 1e+5 and
 by assuming of structure damping
 '''
----
 * Wire specification
  . suspension wire: bolfur, 50 micron diameter, 400 mm length, 2 loops.
  . mass: sapphire, 100 mm diameter, 60mm length, 1.8kg.

 * Q of Violin mode
  . f1=699.05Hz, Q=1.0*10^5
  . f2=700.29Hz, Q=0.63*10^5
  [[http://gw.icrr.u-tokyo.ac.jp:8888/clio_blog/2008/11/06/Graph_sens_081106_violin.pdf]]

 * Extrapolation to pendulum mode Q
  ''violin mode Q と pendulum Q の間には 1:2 or 1:4 の関係があるそうです。'' (pending)

 * Expectation of pendulum mode Q
  みよきさんによるボルファ単体の Q は 1000。
  計算によるdissipation dilution factorは1.2*10^-4.
  これらを組み合わせると、期待されるQ=1*10^7.

Suspension Thermal noise for CLIO 081105

  • sus_thermal.txt fo = 0.7 Hz, Q = 1e+5 and by assuming of structure damping

  • Wire specification
    • suspension wire: bolfur, 50 micron diameter, 400 mm length, 2 loops.
    • mass: sapphire, 100 mm diameter, 60mm length, 1.8kg.
  • Q of Violin mode
  • Extrapolation to pendulum mode Q

    • violin mode Q と pendulum Q の間には 1:2 or 1:4 の関係があるそうです。 (pending)

  • Expectation of pendulum mode Q
    • みよきさんによるボルファ単体の Q は 1000。 計算によるdissipation dilution factorは1.2*10^-4. これらを組み合わせると、期待されるQ=1*10^7.

CLIO/NoiseBudgets/081105/SuspensionThermalNoise (last edited 2009-07-03 16:59:52 by whitehole)