By Devin Gay Radio Ice Cerenkov Experiment. RICE got off the ground and into the ice in 1995 They got started when AMANDA collaborations agreed to co-

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Presentation transcript:

By Devin Gay Radio Ice Cerenkov Experiment

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 the first two antennas were deployed along with under ice transmitters. In 1998 there was further co-deployment with AMANDA. In first RICE hole which was a 5” mechanically drilled hole was dug What they detect are ultra high energy neutrinos from astrophysical sources

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

Signals fed through antennas tuned to 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

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

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

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