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Analyzing Cosmic Rays in S5: Association with Gravitational Wave Channels

This update by Ray Frey from the University of Oregon presents a brief overview of a cosmic ray detector and its data availability. The primary goal is to investigate potential associations between cosmic rays and gravitational wave (GW) channels, as well as to characterize or constrain certain parameters. Exploring possible mechanisms includes direct momentum transfer, TM mode excitations, and any perturbations to the electrostatic charge distribution on test masses. Data samples illustrate cosmic ray events and provide a platform for further analysis.

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Analyzing Cosmic Rays in S5: Association with Gravitational Wave Channels

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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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