On the possibility of radar echo detection of ultra-high energy cosmic ray- and neutrino-induced extensive air showers

Details On the possibility of radar echo detection of ultra-high energy cosmic ray- and neutrino-induced extensive air showers On the possibility of radar echo detection of ultra-high energy cosmic ray- and neutrino-induced extensive air showers

2000-01-17

arxiv.org/abs/hep-ex/0001041v3

Astropart.Phys.15:177-202,2001

Physics

High Energy Physics

High Energy Physics - Experiment

29 pages, 16 figures, uses aas2pp4.sty. Final version, to appear in Astroparticle Physics. Contains new figs, better estimate

Scientific paper

10.1016/S0927-6505(00)00143-2

We revisit and extend the analysis supporting a 60 year-old suggestion that cosmic rays air showers resulting from primary particles with energies above 10^{18} eV should be straightforward to detect with radar ranging techniques, where the radar echoes are produced by scattering from the column of ionized air produced by the shower. The idea has remained curiously untested since it was proposed, but if our analysis is correct, such techniques could provide a significant alternative approach to air shower detection in a standalone array with high duty cycle, and might provide highly complementary measurements of air showers detected in existing and planned ground arrays such as the Fly's Eye or the Auger Project. The method should be particularly sensitive to showers that are transverse to and relatively distant from the detector, and is thus effective in characterizing penetrating horizontal showers such as those that might be induced by ultra-high energy neutrino primaries.

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