Differences between revisions 7 and 12 (spanning 5 versions)

Suspension Thermal noise for CLIO 081105

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

* Wire specification

* Q of Violin mode

* Extrapolation to pendulum mode Q

* 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)

-  ⇤ ← Revision 7 as of 2009-07-02 11:40:03 → 
  Size: 1143
  Editor: whitehole
  Comment:
+   ← Revision 12 as of 2009-07-03 16:53:00 → ⇥
  Size: 1078
  Editor: whitehole
  Comment:
-Deletions are marked like this.
+Additions are marked like this.
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-'''Suspension Thermal noise'''
+= Suspension Thermal noise for CLIO 081105 =
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-[[attachment:sus_thermal.txt]]
+ [[attachment:sus_thermal.txt]]
 * '''Suspension thermal'''
   '''
   fo = 0.7 Hz, 
   Q = 1e+5 and 
   by assuming of structure damping
   '''
-Line 10:
+Line 15:
- 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.
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+Line 19:
- 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
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+Line 23:
-* Extrapolation to Q of pendulum mode
 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。
+* 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)
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-* '''Suspension thermal'''
 '''振り子の Q=10^5 を使って計算した、振り子モード(縦でもpitchでもない)の suspension thermal のラインを昨日のベスト感度曲線に重ねた。'''