J. Adams, Chris Allen, A. Bean, David Besson, D. Box, R. Buniy, J. Drees, George Frichter, Igor Kravchenko, D. McKay, J. Meyers, T. Miller, L. Perry, L. Piccirillo, John Ralston, S. Razzaque, D. Schmitz, David Seckel, S. Seunarine, G. Spiczak
KEYWORDS: Electromagnetism, Antennas, Signal attenuation, Data acquisition, Receivers, Monte Carlo methods, Data modeling, Radio propagation, Amplifiers, Electronics
Upper limits are presented on the diffuse flux of ultra-high energy neutrinos, based on analysis of data taken by the RICE experiment during August, 2000. The RICE receiver array at South Pole monitors cold ice for radio-wavelength Cherenkov radiation resulting from neutrino-induced in-ice showers. For energies above 1 EeV, RICE monitors over 25 km3 sr. We discuss limits based on both hadronic and electromagnetic showers.
S. Barwick, James Beatty, David Besson, John Clem, Stephane Coutu, Michael DuVernois, Paul Evenson, Peter Gorham, Francis Halzen, Abram Jacobson, David Kieda, John Learned, Kurt Liewer, Stephen Lowe, Charles Naudet, Allen Odian, David Saltzberg, David Seckel
The ANITA project is designed to investigate ultra-high energy (>1017 eV) cosmic ray interactions throughout the universe by detecting the neutrinos created in those interactions. These high energy neutrinos are detectable through their interactions within the Antarctic ice sheet, which ANITA will use as a detector target that effectively converts the neutrino interactions to radio pulses. This paper will give an overview of the project including scientific objectives, detection description and mission design.
We will report on the details of the ANITA instrument. This instrument is fundamentally a broadband antenna, which is arrayed and constructed in such a way as to be optimized for the detection and characterization of high-energy neutrino cascades. The requirement to maximize the detector view of the Antarctic ice fields implies low gain antennas yet the need for maximum sensitivity dictates using the highest gain possible. Since the Cherenkov signal increases quadratically at higher frequencies suggesting that the optimal selection is an antenna with constant gain as a function of frequency. The baseline design will be a linearly polarized log-periodic zigzag (LPZZ) antenna.
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