Astronomy and Astrophysics – Astrophysics
Scientific paper
2001-12-20
Phys.Rev.D65:103002,2002
Astronomy and Astrophysics
Astrophysics
44 pages, 29 figures. Minor changes made, reference added, accepted for publication in Phys. Rev. D
Scientific paper
10.1103/PhysRevD.65.103002
Radio Cherenkov radiation is arguably the most efficient mechanism for detecting showers from ultra-high energy particles of 1 PeV and above. Showers occuring in Antarctic ice should be detectable at distances up to 1 km. We report on electromagnetic shower development in ice using a GEANT Monte Carlo simulation. We have studied energy deposition by shower particles and determined shower parameters for several different media, finding agreement with published results where available. We also report on radio pulse emission from the charged particles in the shower, focusing on coherent emission at the Cherenkov angle. Previous work has focused on frequencies in the 100 MHz to 1 GHz range. Surprisingly, we find that the coherence regime extends up to tens of Ghz. This may have substantial impact on future radio-based neutrino detection experiments as well as any test beam experiment which seeks to measure coherent Cherenkov radiation from an electromagnetic shower. Our study is particularly important for the RICE experiment at the South Pole.
Besson David Z.
McKay Douglas W.
Ralston John P.
Razzaque Soebur
Seckel David
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