PEM (Center)takaaki.yokozawa - 7:47 Wednesday 08 March 2023 (24294)
Print this reportComment 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.