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Size: 1062
Comment:
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Size: 1070
Comment:
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| Deletions are marked like this. | Additions are marked like this. |
| Line 17: | Line 17: |
| suspension wire: bolfur, 50 micron diameter, 400 mm length, 2 loops. mass: sapphire, 100 mm diameter, 60mm length, 1.8kg. |
. suspension wire: bolfur, 50 micron diameter, 400 mm length, 2 loops. . mass: sapphire, 100 mm diameter, 60mm length, 1.8kg. |
| Line 21: | Line 21: |
| f1=699.05Hz, Q=1.0*10^5 f2=700.29Hz, Q=0.63*10^5 |
. f1=699.05Hz, Q=1.0*10^5 . f2=700.29Hz, Q=0.63*10^5 |
Suspension Thermal noise
* 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.