KAGRA Logbook

PEM (Center)

tatsuki.washimi - 20:01 Thursday 11 June 2020 (14506)

Acoustic injection (RELF, PSL)

[YokozaWashimi]

Today we did the acoustic injection.

This is the log.

10:00 locked
10:03 NoInjection_1.xml
10:06 swiped sine start (70-1070Hz, 200points, 10s)
10:47 silent
10:50 116Hz study start
11:11 lockloss
11:19 locked
11:22 NoInjection_2.xml
11:25 swiped sine start (350-370Hz, 20points, 10s)
11:31 swiped sine start (270-290Hz, 20points, 10s)
11:36 swiped sine start (105-125Hz, 20points, 10s)
11:46 Line_216Hz-amp100.xml
11:49 Line_216Hz-amp200.xml
11:52 Line_216Hz-amp300.xml
11:24 Line_216Hz-amp500.xml
11:57 Line_700Hz-amp100.xml
12:00 Line_700Hz-amp200.xml
12:03 Line_700Hz-amp300.xml
12:07 Line_700Hz-amp500.xml
12:12 Line_82Hz-amp200.xml
12:14 Line_82Hz-amp300.xml
12: Line_82Hz-amp500.xml
12:33 NoInjection_3.xml
12:35 White Injection (80-1000Hz) start
12:37 White_80-1000Hz_amp2000.xml
12:40 White_80-1000Hz_amp4000.xml
12:47 White_60-0Hz_amp5000.xml

12:53 Acoustin injection in PSL -> no signal in the PSL MIC
go into the mine
13:?? Lockloss
13:57 locked
13:57 NoInjection_4.xml
14:05 Line_320Hz-amp400.xml
14:08 swiped sine start (70-1070Hz, 200points, 10s)
14:14 down (manualy)
14:24 locked
14:25 NoInjection_5.xml
14:26 wiped sine start (70-1070Hz, 200points, 10s)
15:11 wiped sine start (1000-5000Hz, 41points, 10s)
15:21 NoInjection_6.xml
15:30 Line_140Hz-amp100.xml
Line_140Hz-amp200.xml
Line_140Hz-amp300.xml
Line_135Hz-amp100.xml
15:41 lockloss
15:48 locked
NoInjection_7.xml
Line_135Hz-amp200.xml
Line_135Hz-amp300.xml
15:57 Line_385Hz-amp100.xml
Line_385Hz-amp200.xml
Line_385Hz-amp300.xml
16:11 White_100-1000Hz_amp7000.xml
White_700-1000Hz_amp7000.xml
16:20 lockloss

Comments to this report:

takaaki.yokozawa - 6:19 Friday 12 June 2020 (14508)

6/11(Thu)

10:48 Silent

10:50 116Hz 100cnt

10:52 116Hz 200cnt

10:54 116Hz 300cnt

10:59 115Hz 300cnt

11:01 114Hz 300cnt

11:03 117Hz 300cnt

11:05 118Hz 300cnt

11:07 119Hz 300cnt

tatsuki.washimi - 14:46 Saturday 13 June 2020 (14522)

The spectrograms for the swept sine acoustic injection around the REFL table.

Images attached to this comment

tatsuki.washimi - 9:58 Monday 15 June 2020 (14528)

polish up

Images attached to this comment

Non-image files attached to this comment

reflasds.pdf

tatsuki.washimi - 12:06 Monday 15 June 2020 (14533)

for PSL

Images attached to this comment

tatsuki.washimi - 2:44 Wednesday 17 June 2020 (14558)

correlation plot (very preliminary) for REFL area

Images attached to this comment

tatsuki.washimi - 19:33 Sunday 21 June 2020 (14586)

This is a very preliminary result of the PEM projection derived from the swept sine acoustic injection @ REFL.

Images attached to this comment

tatsuki.washimi - 21:37 Tuesday 23 June 2020 (14605)

The projected acoustic noise in the DARK has small structures unnaturally.

One possibility of this reason is the spectrum of microphone.

Even though the DAC amplitude was constant (200 counts) during this measurement, the enverop of the injected peaks is not flat.

Images attached to this comment

takaaki.yokozawa - 10:06 Wednesday 24 June 2020 (14611)

I checked the interesting channels for 116Hz acoustic injection.

no harmonics, no side-band, no frequency conversion was detected in the PEM channels and IMC oplevs.

Images attached to this comment

tatsuki.washimi - 16:23 Wednesday 24 June 2020 (14612)

I compared the results of the POEM projection @ PR booth sound, between new and old methods. (top: new / bottom : old)

They are about similar, but

frequency resolution becomes worse (due to the measurement time for each frequency)
evaluated frequency range becomes wider
overestimation (background < projected) looks to be reduced

Images attached to this comment

tatsuki.washimi - 22:30 Wednesday 24 June 2020 (14615)

I tested my analysis result by applying this response function to the white noise injected data.

black : background strain data
blue : white noise injected strain data
red : projected strain by the responce function and white noise injected MIC data