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PEM (Center)
takaaki.yokozawa - 11:10 Thursday 23 March 2023 (24508) Print this report
Vibration injection to OMC bellows legs
This was the yesterday (2023/03/22) work.

I checked the bellows leg dependence of the OMC chamber by injecting the same vibration to each legs.

- Fig.1. Usual OMC leg (-Y side)
- Fig.2. OMC leg2 (-X +Y side)
- Fig.3. OMC leg3 (+X +Y side)

(Red) 50-100 Hz
(Blue) 100-200 Hz
(Green) 200-300 Hz
(Brown) 300-400 Hz
(Pink) 400-500 Hz
(Mizuiro) 500-600 Hz

Top Figure : Scaled DARM
Bottom Figure : TEAC710 ACC near the vibrator.

Fig.1. and Fig.3. seems larger effect than Fig.2. in 200-300 Hz(Green) that imply the OMC structure(?)
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