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takaaki.yokozawa - 7:47 Wednesday 08 March 2023 (24294) Print this report
Comment to Hammering test after IFI work (24293)
Vibration injection test to the leg of the REFL table.
The diaggui files are placed in
/users/yokozawa/Data/DARM/230307/

Fig.1. 50 -1000 Hz white injection
Two peaks appeared(?)

Fig.2. 50 - 100 Hz white injection
Increased the noise floor below 150 Hz, but unknown due to this work or not.

Fig.3. 100 - 200 Hz white injection
Increased the noise floor around 120 Hz

Fig.4. 200 - 300 Hz white injection
Peaks appeared!

Fig.5. 300 - 400 Hz white injection
No special peak appeared.

Fig.6. 400 - 500 Hz white injection
Some coherent peak appeared, but not so large (Two order larger vibration injected compared from environment)

Fig.7. 500 - 600 Hz white injection
Large peak appeared.
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