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PEM (Center)

takaaki.yokozawa - 3:58 Wednesday 25 March 2020 (13798)

Acoustic injection to the PSL room

We performed the acoustic injection to the PSL room.

GPSTime : 1269111350 - 1269111500

60-1000Hz uniform 10000DAC count

Images attached to this report

Comments to this report:

takaaki.yokozawa - 6:04 Wednesday 25 March 2020 (13802)

This result is not REFL table, but PSL room. So we didn't confirm the effect of reducing scattered light at REFL table.

tatsuki.washimi - 9:41 Wednesday 25 March 2020 (13805)

Background : 1269111510 - 1269111610
Injected : 1269111395 - 1269111495
Main channel : K1:CAL-CS_PROC_C00_STRAIN_DBL_DQ
PEM channel : K1:PEM-MIC_PSL_TABLE_PSL4_Z_OUT_DQ

The acoustic noise level over 300 Hz in PSL room is lower than the current sensitivity about with factor 3.

Images attached to this comment

13805_20200325014054_projectionk1calcsprocc00straindbldqk1pemmicpsltablepsl4zoutdq.png

13805_20200325103810_sigmak1pemmicpsltablepsl4zoutdq.png

13805_20200325104408_sigmak1calcsprocc00straindbldq.png

13805_20200325104431_couplingfunctionk1calcsprocc00straindbldqk1pemmicpsltablepsl4zoutdq.png

13805_20200325104446_projectionratiok1calcsprocc00straindbldqk1pemmicpsltablepsl4zoutdq.png

takaaki.yokozawa - 5:13 Saturday 28 March 2020 (13857)

I perform the NInjA analysis to accelerometer in the PSL room.

1. 225.3Hz : on the PSL table (ACCs shape is suitable)

2. 262.4Hz : ACC on the periscope at exit point

3. 292Hz : on the PSL talbe (ACC3 is largest)

4.315Hz : ACC on the periscope at eit point

5. 335Hz : PSL mic

6. 370Hz : on the PSL table

7. 380 Hz : Periscope for the green fiber (coherence with ALS CARM)