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## page was renamed from CLIO/NoiseBudgets/SuspensionThermalNoise
## page was renamed from CLIO/Technicals/SuspensionThermalNoise
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[[attachment:sus_thermal.txt]]

----
* '''Suspension thermal'''
   '''
   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

sus_thermal.txt

* Suspension thermal

  • 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)