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LHO Cosmic Rays in S5 - update

LHO Cosmic Rays in S5 - update. Ray. Frey, U Oregon. Detector/readout description (brief) Data availability Goal: Determine if any association between cosmic rays and GW channel Characterize (or constrain for AdL) Possible mechanisms:

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LHO Cosmic Rays in S5 - update

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  1. LHO Cosmic Rays in S5 - update Ray. Frey, U Oregon • Detector/readout description (brief) • Data availability Goal: • Determine if any association between cosmic rays and GW channel • Characterize (or constrain for AdL) • Possible mechanisms: • Direct momentum transfer to TM - expected negligible for LIGO I • TM modes excitation (heat) - expected negligible for LIGO I • Perturbation of the electrostatic charge distribution on TM - ?? • Rai Weiss, LIGO-T960137 • V. Braginski, LIGO-G050457 G070526-00-Z R. Frey

  2. G070526-00-Z R. Frey

  3. A typical CR event – pulse height vs time(sample) A B Slow falloff (80 kHz sampling) Fast rise  GPS time stamp (10 ns resolution) C D G070526-00-Z R. Frey

  4. trigger time stamp: day 159, 03:33:26.682199 UTC Sample 1 Sample 2 Sample 3 Trigger sample (0x10/0x08) a raw event record: CR event data format 10 26682199 f1590333 fec2 ffba fec6 feaa fec9 ffa9 fecd feb1 fed3 ff9d 445 2bb4 feda fe36 249 21ea ... febc ffb8 fec0 fea5 a pre-processed record: gps time: 865308820.682199 2 865308820 682199 7 -10 11 13 14 7 18 20 24 19 1418 11543 31 378 910 9037 ... 1 -8 5 8 Sample 1, etc offset corrected, decimal G070526-00-Z R. Frey

  5. maybe recoverable recoverable Rate vs time: 2/06 – 6/07 G070526-00-Z R. Frey

  6. average pulse height vs time (PMT C) need to check recoverable G070526-00-Z R. Frey

  7. Data description and access A web page includes a description of data and detector, and data access: http://physics.uoregon.edu/~rayfrey/LIGO/cosmic/S5_data/CR_S5.html an excerpt: ~100 most energetic events  DQ category 4 ? G070526-00-Z R. Frey

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