We performed the shaker injection for OMC chamber.
We can see some excess in several frequencies.
1. around 80 Hz
2. around 290 Hz
3. around 560 Hz
4. around 800 Hz
The analysis results will be appeared later.
Unfortunately, we can only one position and we could not check around 800 Hz in detail.
So if there are next chance, we will try to do it.
The location we shook today was on the shoulder of the -Y side flange because it was easy to fix the shaker around the beam-hight.
Shaking tests for other locations were not performed due to the instability of the IFO.
This is result of the broad-band injection for 3 amplidtudes
I analyzed today's data and estimated the noise projection.
The formula used is the same as written here.
It is not sure if this analysis is appropriate, but if it is correct, the noise contribution from this location is much lower than the sensitivity.
In case you used nearest accelerometer from shaker, there are possibility of under estimation.
It may depend on the noise path, could you try similar analysis using other accelerometer?
Or shaker test again using another shaker point.
The ACC used in this analysis was "ACC3", near the shaker.