KAGRA MIR (Absorption)
ManuelMarchio - 00:02, Tuesday 26 July 2016 (280)
Measurement analysis

I did some analysis on the last absorption measurements (entry 279).

X, Y: output signal from Lock-in Amp.

I fitted the histograms of X and Y signals with gaussian. For raw data and for filtered data.

I calculated the precision of the measurement as std(sqrt( (X-Xo)^2 + (Y-Yo)^2 )) and used the calibration to get the ppm/cm

 

2016-07-20. Tama-size , 1h, rate: 100ms.

DATE

2016-07-20

DC X/DC*1e6

X/DC*1e6  gauss.fit

Y/DC*1e6 Y/DC*1e6
 gauss.fit
sqrt(meanX/DC^2+meanY/DC^2)*1e6

Absorption

ppm/cm

phase
Pump mean std mean  std fit_mean fit_std

mean

std fit_mean fit_std   mean precision mean std
0W 6.5 V 0.11% 0.04 12.1 0.08 11.2 0.64 12.0 0.59 11.9 0.64 6.8 7.9 -178° 131°
9W 6.6 V 0.15% -9.2 13.7 -9.0 11.3 0.34 13.5 0.40 11.4 9.2

2016-07-21. Tama-size , 1h, rate: 100ms

DATE

2016-07-21

DC X/DC*1e6

X/DC*1e6 gauss.fit

Y/DC*1e6 Y/DC*1e6
 gauss.fit
sqrt(meanX/DC^2+meanY/DC^2)*1e6

Absorption

ppm/cm

phase
Pump mean std mean std fit_mean fit_std

mean

std fit_mean fit_std   mean precision mean std
0W 6.5 V 0.11% -0.40 11.8  -0.44 11.7 0.26 12.1 0.16 12.1 0.48 6.1 6.7 -105° 104°
9W 6.6 V 0.15% -2.6 13.6 -3.4 13.1 -7.6 12.9 -7.4 12.4 8.2

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After average filtering, filter order: 600 (1min)

2016-07-20.

DATE

2016-07-20 

DC X/DC*1e6

X/DC*1e6 gauss.fit

Y/DC*1e6 Y/DC*1e6
 gauss.fit
sqrt(meanX/DC^2+meanY/DC^2)*1e6

Absorption

ppm/cm

phase
Pump  mean std mean std  fit_mean fit_std

mean

std  fit_mean fit_std   mean precision mean std
0W 6.5 V 0.11% 0.05 1.5  0.005  1.6 0.6 1.2 0.72  1.25 0.65 6.8 1.3 -178° 167°
9W 6.6 V 0.15% -9.1 1.9 -9 2 0.34 1.9  0.5 1.9  9.16

 

2016-07-21.

DATE

2016-07-21 

DC X/DC

X/DC gauss.fit

Y/DC Y/DC gauss.fit sqrt(meanX/DC^2+meanY/DC^2)*1e6

Absorption

ppm/cm

phase
Pump mean std mean std  fit_mean fit_std

mean

std  fit_mean fit_std   mean precision mean std
0W 6.5 V 0.11% -0.4 1.3 -0.4 1.3  0.25 1.25 0.3 1.25 0.4 6.1 1.8 -105° 24°
9W 6.6 V 0.15% -2.6 3.4 -2.8 3.4 -7.5 3.17 -6.8 3.4

8.15

Images attached to this report
280_20160725162238_screenshotfrom20160725232205.png 280_20160725162254_screenshotfrom20160725231803.png