Particle-level model for radar based detection of high-energy neutrino cascades.
We present a particle level model for calculating the radio scatter of incident RF radiation from the plasma formed in the wake of a particle shower. We incorporate this model into a software module ("RadioScatter") that can be used in conjunction with a Monte-Carlo program to model the expected reflected signal from a given particle shower. RadioScatter calculates the classical scattering amplitudes using the individual particle equations of motion, accounting for collisions, transmitter and receiver geometries, refraction at boundaries, and antenna gain patterns. We find appreciable collective scattering amplitudes with coherent phase for a range of geometries, with high geometric and volumetric acceptance. Details of the calculation are discussed, as well as the implementation of RadioScatter into GEANT4. A laboratory test of such reflections, currently scheduled at SLAC in the spring of 2018, is briefly described. Prospects for a future in-ice, high-energy neutrino detector, along with comparison to current detection strategies, are presented.
Publisher URL: http://arxiv.org/abs/1710.02883