PoS - Proceedings of Science
Volume 358 - 36th International Cosmic Ray Conference (ICRC2019) - CRI - Cosmic Ray Indirect
Coherent transition radiation from the geomagnetic air shower current
K. de Vries,* S. Prohira
*corresponding author
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Pre-published on: July 22, 2019
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Since the year 2000 the radio detection technique has become a well established method to probe cosmic-ray-induced air showers. In this work, we discuss the coherent transition radiation produced when the particle cascade crosses a boundary surface. Standard transition radiation is the emission induced due to a net charge crossing between different media. We show that a similar effect is expected for a net charge-neutral transverse current crossing a boundary. We discuss the implications of this transition radiation component for the coherent radio emission from a high-energy cosmic-ray-induced particle cascade hitting Earth. We show that this component cannot be neglected for balloon-based experiments such as ANITA, or detectors below the boundary surface such as ARA.
DOI: https://doi.org/10.22323/1.358.0232
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