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By Devin Gay

RICE. Radio Ice Cerenkov Experiment. By Devin Gay. History Of RICE. RICE got off the ground and into the ice in 1995

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By Devin Gay

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  1. RICE Radio Ice Cerenkov Experiment By Devin Gay

  2. History Of RICE • RICE got off the ground and into the ice in 1995 • They got started when AMANDA collaborations agreed to co-deploy shallow radio receivers in the first hole that was dug. In 1996-97 the first two antennas were deployed along with under ice transmitters. In 1998 there was further co-deployment with AMANDA. In 1998-99 first RICE hole which was a 5” mechanically drilled hole was dug • What they detect are ultra high energy neutrinos from astrophysical sources

  3. About the Setup • Surface Transmitters were used to verify that the antennas could detect with better than 10ns timing precision • The PMT’s that they got from AMANDA can be “heard” 2km below giving preliminary indication of radio transparency of the ice. • Currently there are 18 dipoles and amps in the ice, 3 surface horns, and 1 ‘line’ antenna which is an WWII surplus. 16 of the dipoles feed directly in the scopes so they can capture wave forms as well as timing information • Each receiver (aka channel) has a 36dB amp in the ice and a 52dB amp on the surface

  4. More About the Setup • Signals fed through antennas tuned to 200-300 MHz and recent calibration studies show they have ~200MHz band width • Each Antennas is housed in hard plastic pressure and each amplifier is incased in a steel pressure vessel • Using waveforms requires the knowledge of: • Electric fields due to showers • Antenna properties • Attenuation length of radio waves in ice

  5. Even More About the Setup • Under ice transmitter broadcast to the array are at timing resolutions of 1.5-2ns • Angular resolution of current array is 10 degrees at 10BeV for events scattered within 1km of array

  6. Work in Progress • Reconstruction • Use amplitude information • Study of Monte Carlo showers, antenna response, and ice transparency • Study RICE/AMANDA/SPASE overlap physics • Radio signals from electromagnetic components of air shower that stop in the ice • Study hadronic components of shower smaller radio signals but maybe enough so that they can detect

  7. Conclusion • When and how they got started. • how all of the parts work and how they are keep safe under the ice • What their plans are for the future

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