We performed the acoustic injection test at center area.
Before the first measurement, I entered the PSL room and set the speaker.
5 min 10:10-
5 min 10:30-
1. Swept sine PSL room
70-900Hz, 100 cnt, 5 Hz resolution
2023/06/26 10:41:54 - 11:17:00 (JST)
2. Wide frequency PSL room
1000 cnt
2023/06/26 11:18:00 - 11:38:00 (JST)
3. Wide frequency PSL room
2000 cnt
2023/06/26 11:39:00 - 11:59:00 (JST)
Afore the first measurement, I entered the PSL room and removed the speaker.
5 min 12:05-
Then, I set the speaker around SR3, also, I moved the portable PEM sets to SR3 area (Report later)
4. Swept sine SR3 area
70 - 900 Hz, 100 cnt 5 Hz resolution
2023/06/26 12:30:25 - 13:10:00 (JST)
We noticed there are lock loss during measurement 4.
At the same time, SR3 suspension tripped.
We could not identify acoustic injection caused lock loss or not
Anyway recovered the interferometer soon.
5. Swept sine SR3 area
50 -200 Hz, 50 cnt, 5 Hz resolution
2023/06/26 13:19:05 - 13:30:00 (JST)
After this measurement, we moved the speaker set to BS plus Y area, but during this work, lock loss again.
So we once went to Yend and clean up the acoustic injection test sets.
During Yend work, the interferometer automatically recovered.
6. Swept sine BS area
50 - 900 Hz, 100 cnt, about 5Hz resolution
2023/06/26 14:23:21 - 14:58:00 (JST)
7. Wide frequency BS area.
2000 cnt
2023/06/26 14:59:00 - 15:09:00 (JST)
8. Wide frequency BS area.
1500 cnt
2023/06/26 15:09:00 - 15:19:00 (JST)
9. Wide frequency BS area.
1000 cnt
2023/06/26 15:19:00 - 15:29:00 (JST)
10 Swept sine BS area
300-400 Hz, 50 cnt, 1 Hz resolution
2023/06/26 15:29:18 - 15:49:30 (JST)
After this measurement, we cleaned up the acoustic injection set
Fig.2. New portable PEMs around SR3, we will also check the effect of the human activities
picture for BS
Analysis of the PSL
1. Swept sine PSL room
70-900Hz, 100 cnt, 5 Hz resolution
2023/06/26 10:41:54 - 11:17:00 (JST)
Analysis of the SR3
4. Swept sine SR3 area
70 - 900 Hz, 100 cnt 5 Hz resolution
2023/06/26 12:30:25 - 13:10:00 (JST)We noticed there are lock loss during measurement 4.
At the same time, SR3 suspension tripped.
We could not identify acoustic injection caused lock loss or not
Anyway recovered the interferometer soon.5. Swept sine SR3 area
50 -200 Hz, 50 cnt, 5 Hz resolution
2023/06/26 13:19:05 - 13:30:00 (JST)
Analysis of the BS
6. Swept sine BS area
50 - 900 Hz, 100 cnt, about 5Hz resolution
2023/06/26 14:23:21 - 14:58:00 (JST)
Some remarkable frequencies are picked up.
