E3/E4 Line Noise Investigation LIGO-G010353-00-Z Sergey Klimenko Soma Mukherjee Bernard Whiting
-
Upload
kay-robinson -
Category
Documents
-
view
26 -
download
0
description
Transcript of E3/E4 Line Noise Investigation LIGO-G010353-00-Z Sergey Klimenko Soma Mukherjee Bernard Whiting
![Page 1: E3/E4 Line Noise Investigation LIGO-G010353-00-Z Sergey Klimenko Soma Mukherjee Bernard Whiting](https://reader036.fdocuments.us/reader036/viewer/2022062408/56813031550346895d95c7bb/html5/thumbnails/1.jpg)
E3/E4Line Noise Investigation
LIGO-G010353-00-Z
Sergey KlimenkoSoma MukherjeeBernard Whiting
Bob Coldwell
August 15, 2001
•Outline LLO line noise (E4 run)
LLO calibration lines (E4 run)
Magnetometer studies (E3 run)
LLO violin modes (E4 run)
![Page 2: E3/E4 Line Noise Investigation LIGO-G010353-00-Z Sergey Klimenko Soma Mukherjee Bernard Whiting](https://reader036.fdocuments.us/reader036/viewer/2022062408/56813031550346895d95c7bb/html5/thumbnails/2.jpg)
E4 L1:LSC-AS_Q Lines
• LLO lines: Power lines (60Hz and harmonics): ~130 Sampling lines (2048, 4096, 6144) + sidebands Calibration lines + sidebands (16Hz) Single lines: ~ 15
• E4 data 5 hours starting at 673681395 (15&16 lock sections) Line Monitor used to track lines
![Page 3: E3/E4 Line Noise Investigation LIGO-G010353-00-Z Sergey Klimenko Soma Mukherjee Bernard Whiting](https://reader036.fdocuments.us/reader036/viewer/2022062408/56813031550346895d95c7bb/html5/thumbnails/3.jpg)
L1:LSC-AS_Q power lines
• 136 harmonics (all lines marked with red)
1
8679
235
amplitude of first 9 harmonics
![Page 4: E3/E4 Line Noise Investigation LIGO-G010353-00-Z Sergey Klimenko Soma Mukherjee Bernard Whiting](https://reader036.fdocuments.us/reader036/viewer/2022062408/56813031550346895d95c7bb/html5/thumbnails/4.jpg)
L1:LSC-AS_Q sampling lines
• Narrow lines at 2048Hz, 4096Hz, 6144Hz Group of sidebands (modulation at 16Hz sharp) Sidebands are extremely narrow
amplitude of 17.625Hz line
sidebands-16
3216-32-48 48
6144Hz4096Hz
![Page 5: E3/E4 Line Noise Investigation LIGO-G010353-00-Z Sergey Klimenko Soma Mukherjee Bernard Whiting](https://reader036.fdocuments.us/reader036/viewer/2022062408/56813031550346895d95c7bb/html5/thumbnails/5.jpg)
calibration lines (amplitude)
• E4 run
• 8 calibration lines for X arm ITMX(35, 71, 271, 1001) (red curves) ETMX(36, 72, 272, 1002) (black curves)
271Hz (red), 272Hz(black) 1001Hz (red), 1002Hz(black)
35Hz (red), 36Hz(black) 71Hz (red), 72Hz(black)
![Page 6: E3/E4 Line Noise Investigation LIGO-G010353-00-Z Sergey Klimenko Soma Mukherjee Bernard Whiting](https://reader036.fdocuments.us/reader036/viewer/2022062408/56813031550346895d95c7bb/html5/thumbnails/6.jpg)
calibration lines (phase)
Non-stationary TF
around 270Hz
271Hz (red), 272Hz(black) 1001Hz (red), 1002Hz(black)
35Hz (red), 36Hz(black) 71Hz (red), 72Hz(black)
red – end of lock sectionblk – start of lock section
30o
![Page 7: E3/E4 Line Noise Investigation LIGO-G010353-00-Z Sergey Klimenko Soma Mukherjee Bernard Whiting](https://reader036.fdocuments.us/reader036/viewer/2022062408/56813031550346895d95c7bb/html5/thumbnails/7.jpg)
calibration lines (16Hz modulation)
• no 16 Hz sidebands observed for power lines
• perhaps sidebands for calibration and sampling lines are sampling artifacts
sidebands-16
3216-32
-48 48
1001Hz 1002Hz
![Page 8: E3/E4 Line Noise Investigation LIGO-G010353-00-Z Sergey Klimenko Soma Mukherjee Bernard Whiting](https://reader036.fdocuments.us/reader036/viewer/2022062408/56813031550346895d95c7bb/html5/thumbnails/8.jpg)
LSC-AS_Q “single” lines
![Page 9: E3/E4 Line Noise Investigation LIGO-G010353-00-Z Sergey Klimenko Soma Mukherjee Bernard Whiting](https://reader036.fdocuments.us/reader036/viewer/2022062408/56813031550346895d95c7bb/html5/thumbnails/9.jpg)
E4 L1:LSC-AS_Q Lines (summary)
F,HZ
W, HzRms
A,a.e.
SNR Source System
6.207 0.068 0.90 1.0 ? LSC
7.442 0.033 1.74 1.2 ? LSC
5.7856.086
0.0310.057
5.878.54
1.61.3
??
LSC
12.358 0.052 0.66 1.7 HAM stack LSC
16.02516.050
~0.01~0.01 1.54 9.9
??
LSC
17.390 0.066 0.14 0.6 LSC
19.667 0.010 0.70 5.4
53.319 0.036 0.03 0.8 HVAC system (?) LSC
60.000 (V) <0.01 1.50 300 Power lines LSC, IOO…
117.166122.826
0.0200.030
0.030.03
2.41.9
??
LSC
1775.35,1886.48
<0.05<0.05
??
LSC
35,71,271,1001
- ITMX calibration lines +16 Hz sidebands
LSC
36,72,272,1002
- ETMX calibration lines +16 Hz sidebands
LSC
2048, 40966144
- Sampling artifacts (1,2,3 harmonics +16Hz sidebands)
LSC
![Page 10: E3/E4 Line Noise Investigation LIGO-G010353-00-Z Sergey Klimenko Soma Mukherjee Bernard Whiting](https://reader036.fdocuments.us/reader036/viewer/2022062408/56813031550346895d95c7bb/html5/thumbnails/10.jpg)
Magnetometers study
• time-frequency analysis of L0:PEM-EX_MAG1X & H0:PEM-EX_MAG1X correlation of Im and Re parts of data in Fourier domain for details see S.Mukherjee report at
http://blue.ligo-wa.caltech.edu/engrun/E3/Results/LineMonitor/index.html
• data section (E3) 1800s long: GPS time 668208654-668210176
see pixels with r<0.1 & r>0.9
60Hz odd harmonics
60Hz even harmonics
56.7 Hz harmonics
![Page 11: E3/E4 Line Noise Investigation LIGO-G010353-00-Z Sergey Klimenko Soma Mukherjee Bernard Whiting](https://reader036.fdocuments.us/reader036/viewer/2022062408/56813031550346895d95c7bb/html5/thumbnails/11.jpg)
Magnetometers study
•coherence of PEM-EX_MAG1 XY, XZ and YZ pairs . LHO - const orientation of the magnetic field vector (one source) LLO - orientation of the magnetic field changes with time (many sources)
amplitude of 17.625Hz line
LHO LLO
![Page 12: E3/E4 Line Noise Investigation LIGO-G010353-00-Z Sergey Klimenko Soma Mukherjee Bernard Whiting](https://reader036.fdocuments.us/reader036/viewer/2022062408/56813031550346895d95c7bb/html5/thumbnails/12.jpg)
LineMonitor results
•close look at L0:PEM-EX_MAG1X with the Line Monitor 60Hz even harmonics
2
468
60Hz odd harmonics
1
537
56.757Hz harmonics
1
2
345
0.0504Hz modulation
119.98Hz
119.88Hz
![Page 13: E3/E4 Line Noise Investigation LIGO-G010353-00-Z Sergey Klimenko Soma Mukherjee Bernard Whiting](https://reader036.fdocuments.us/reader036/viewer/2022062408/56813031550346895d95c7bb/html5/thumbnails/13.jpg)
LineMonitor results (continue)
• What happened? 2 sets of power lines – power mains & compressor at 212sec motor was switched off - 56.76Hz lines shifted to
59.94Hz
amplitudes of 56.76Hz & 59.94Hz harmonics are exactly the same does it affect the interferometer channel?
T<212sT>212s 2x56.76
4x56.76
2x59.94
4x59.94
![Page 14: E3/E4 Line Noise Investigation LIGO-G010353-00-Z Sergey Klimenko Soma Mukherjee Bernard Whiting](https://reader036.fdocuments.us/reader036/viewer/2022062408/56813031550346895d95c7bb/html5/thumbnails/14.jpg)
BS violin modes?
• BS violin modes are expected around 225Hz (T000020-01-W)
• group of lines in 235-240 Hz region was observed in the E4 LLO data integrated 3.5h of data (673681395-673699395) with 2mHz resolution too low Q to be violin modes…
Q ~10000?
32 Hz sideband of 271Hz
240 Hz “violin modes”235.90236.70238.25239.50
![Page 15: E3/E4 Line Noise Investigation LIGO-G010353-00-Z Sergey Klimenko Soma Mukherjee Bernard Whiting](https://reader036.fdocuments.us/reader036/viewer/2022062408/56813031550346895d95c7bb/html5/thumbnails/15.jpg)
BS violin modes?
Q ~1000
235.84
238.23
![Page 16: E3/E4 Line Noise Investigation LIGO-G010353-00-Z Sergey Klimenko Soma Mukherjee Bernard Whiting](https://reader036.fdocuments.us/reader036/viewer/2022062408/56813031550346895d95c7bb/html5/thumbnails/16.jpg)
Documentation & Plans
• http://blue.ligo-wa.caltech.edu/engrun/E3/index.html
See LNI results at LineMonitor
• Complete & submit E3/E4 final report by end of August
• Further LNI work
Look for magnetometer transients in E4 data & its correlation with
interferometer channel
Need more data & more detail study of violin modes
Analysis of E5 data (LHO lines, correlations, violin modes)