LIGO-G020099-00-Z E7 Correlations Nelson Christensen, Russ Bainer - Carleton College Adrian Ottewill - University College Dublin Steve Penn - Syracuse.

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LIGO-G Z E7 Correlations Nelson Christensen, Russ Bainer - Carleton College Adrian Ottewill - University College Dublin Steve Penn - Syracuse University Dennis Ugolini - Caltech

LIGO-G Z CorrMon from Adrian Concentrate on correlations between AS_Q, IOO-MC_F and PEMs

LIGO-G Z XBIC from Steve A program that calculates bicoherence Use it to (hopefully) find non-linear noise upconversion See Steve Penn’s talk!

LIGO-G Z CorrMon Results LHO Concentrate on H2:LSC-AS_Q and IOO-MC_F Dominant correlation among channels by far is with the PSL accelerometers PSL-Microphone and HAM accelerometers show correlations LVEA seismometers show lots of noise below 20 Hz in both MC_F and AS_Q -- no surprise there. There are a series of peaks in MC_F at 40, 47, 50, 52, and 56 Hz that don't show up at all in AS_Q. ceiling fans ???

LIGO-G Z CorrMon Results LHO One peak that seems to carry over into AS_Q with regularity is a somewhat-wide spike at about 230 Hz, which shows up in all of the accelerometers and the microphone. What's the source of this? VME crate fans??? Most other channels show only 60 Hz & harmonics

LIGO-G Z PSL Accelerometers

LIGO-G Z Microphones

LIGO-G Z HAM Accelerometers

LIGO-G Z LVEA Seismometers

LIGO-G Z CorrMon Results LLO Concentrate on H2:LSC-AS_Q and IOO-MC_F Again - Dominant correlation among channels by far is with the PSL accelerometers (noisier than LHO). 200 Hz bump, PSL periscope (Rana’s talk) Again- PSL Microphone and HAM accelerometers show correlations LVEA seismometers show lots of noise below 20 Hz in both MC_F and AS_Q -- no surprise there. See a series of peaks in MC_F at 44, 48, 52, 57, and 59 Hz that NOW DO show up at in AS_Q. They are sharper than the LHO peaks. ceiling fans ???

LIGO-G Z CorrMon Results LLO Consistent noise correlations seen in AS_Q with accelerometers around 50 Hz. Most other channels show only 60 Hz & harmonics

LIGO-G Z PSL Accelerometers

LIGO-G Z Microphones

LIGO-G Z HAM Accelerometers

LIGO-G Z BSC Accelerometers

LIGO-G Z LVEA Seismometers

LIGO-G Z Bicoherence Enters The Correlation Game Steve Penn’s program XBIC (hear his talk) A process to hopefully identify non-linear upconversion Bicoherence will be a central part our correlation investigation

LIGO-G Z Bicoherence Example