S2/S3 calibration
description
Transcript of S2/S3 calibration
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March 17, 2004 G040143-00-Z
S2/S3 calibrationS2/S3 calibrationGabriela González,
Louisiana State UniversityJustin Garofoli, Michael Landry, Luca Matone, Hugh Radkins
(LHO), Rana Adhikari, Peter Fritschel (MIT), Szabi Marka, Peter Shawhan, Patrick Sutton (Caltech), Brian O’Reilly (LLO)
PlusXavier Siemens (UWM),
Martin Hewittson (GEO) (welcome!)
LIGO Science Collaboration meeting, March 16 2004
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Frequency dependent Frequency dependent calibration: key formulascalibration: key formulas
)()()(1
)()()(),(
fGtt
fCtfhtfASQ
)()()()()(),( fDtfCtfAtfG
interferometer
digital filterspendulum
D(f)DARM_ERR
Open loop gain Optical gain Digital gain
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Measurement and modelingMeasurement and modeling
)()()(1
)(1)()(
),(
),(
0
0
0 cal
cal
cal
cal
fGtt
fGt
X
tX
tfASQ
tfASQ
)()( 0 fPAfA DC gain (measured)
Pendulum (modeled)
)()()()(0 fDfCfAfG Open loop gain (measured) Digital gain (known)
sensing function (modeled, gain inferred)
At a reference time (2-3 times in science run):
Measured(SenseMon)In frames
inferred (SenseMon)
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S2 calibration: V3 (final)S2 calibration: V3 (final)http://blue.ligo-wa.caltech.edu/engrun/Calib_Home/
Rana’s, Peter’s Matlab Models: L1IFOparams.m, H1IFOparams.m, H2IFOparams.m, LSCModel.m are used by Mike, Brian, Gaby to produce reference functions … S02-H1-CAL-OLOOP_GAIN-734073939.txt.gz S02-H1-CAL-CAV_GAIN-734073939.txt.gz S02-H1-CAL-RESPONSE-734073939.txt.gz
that Patrick’s SenseMon (and Gaby afterwards) uses to produce alphas, betas…L1Alpha.Beta.txt, H1AlphaBeta.txt, H2AlphaBeta.txt (Peter Fritschel: H1AlphaBetaSmooth.txt)
and Duncan Brown converts everything into frames…H-CAL_REF_V03-734073939-64.gwfH-CAL_FAC_V03-729273600-5094000.gwf
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S2 noise curvesS2 noise curveshttp://www.ligo.caltech.edu/~lazz/distribution/LSC_Data/
stra
in/r
tHz
Hertz
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L1 L1 , ,
3% <0.7%
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L1 L1 , ,
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H1 H1 , ,
10% 3%
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S2 L1 errorsS2 L1 errorsMagnitude: 2
4
22
4
22
4
2222
1
1
1
1
1
1G
G
G
G
G
G
G
G
G
D
D
A
A
R
R
Mike Landry, Brian O’Reilly
/~3%
Preliminary!
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S2 L1 errorsS2 L1 errorsPhase:
2
4
22222
4
2222
1
1
1
1GDAR
G
GGG
G
G
Mike Landry, Brian O’Reilly
/~3%
Preliminary!
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S2 H1 errorsS2 H1 errorsMagnitude: 2
4
22
4
22
4
2222
1
1
1
1
1
1G
G
G
G
G
G
G
G
G
D
D
A
A
R
R
Mike Landry,Brian O’Reilly
Early epoch: /~10%
Preliminary!
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S2 H1 errorsS2 H1 errorsMagnitude: 2
4
22
4
22
4
2222
1
1
1
1
1
1G
G
G
G
G
G
G
G
G
D
D
A
A
R
R
Mike Landry,Brian O’Reilly
Final epoch: /~3%
Preliminary!
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S2 H1 errorsS2 H1 errorsPhase:
2
4
22222
4
2222
1
1
1
1GDAR
G
GGG
G
G
Mike Landry,Brian O’Reilly
Early epoch: /~10%
Preliminary!
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S2 H1 errorsS2 H1 errorsPhase:
2
4
22222
4
2222
1
1
1
1GDAR
G
GGG
G
G
Mike Landry,Brian O’Reilly
Final epoch: /~3%
Preliminary!
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S3 calibration: dynamic S3 calibration: dynamic
)()()(1
)()()(),(
fGtt
fCtfhtfASQ
)()()()()(),( fDtfCtfAtfG
interferometer
digital filterspendulum
D(f)DARM_ERR
Open loop gain Optical gain Digital gain
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S3 calibration : dynamic S3 calibration : dynamic
A dynamic : calculated at 16384Hz, low pass filtered at ~0.5 Hz, Read at ~8 Hz(?),written at 16 Hz, averaged by SenseMon at 1/60s
Notice the amplitude and time scale!!
L1 – S3
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S3 online H1 S3 online H1 , ,
PatrickSutton
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S3 online H1 S3 online H1 , , PatrickSutton
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S3 calibration: S3 calibration: V1 V1 (Jan 22, 2004)
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S3 online CalibrationS3 online Calibration
PatrickSutton
Gets better if V1 is used!
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S3 online CalibrationS3 online Calibration
PatrickSutton
Gets better if V1 is used!
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S3 H1 CalibrationS3 H1 Calibration
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Calibration StatusCalibration Status• S2 calibration:
– final V3 version posted Sept’03 – document (with errors) in preparation
• S3 calibration:– Online (E10) calibration – V1 calibration, posted on Jan’04– V2, final calibration (coming):
• calibration for LHO injection times (V1.1?)• models representing better the actual hardware
• S4 calibration: – Online info from Sensemon (P. Sutton)– On line time-domain calibration (X. Siemens)– faster tracking of line amplitudes– photon calibrator