Influence of atmospheric electric fields on radio emission from air showers

LOFAR CR-KSP, Olaf Scholten (Corresponding author), Gia Trinh, Ute Ebert

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Abstract

We show that atmospheric electric fields as exist in thunderclouds can strongly affect the radio emission from cosmic air showers. We also show, using data from LOFAR, that from the measured radio footprint of cosmic-ray air showers, i.e. intensity, linear and circular polarization at various distances from the shower core, one can determine the direction and strength of the electric field as function of height along the path of the cosmic ray. This method can be regarded as tomography of thundercloud electric fields using cosmic rays as probes. We will present an analysis of selected events measured during thunderstorm conditions in the period from December 2011 till August 2014. The fields we extract are consistent with the generally accepted charge structure in thunderclouds consisting out of three charge layers.

Original languageEnglish
Article number416
Number of pages8
JournalProceedings of Science
Volume358
DOIs
Publication statusPublished - 2 Jul 2021
Event36th International Cosmic Ray Conference, ICRC 2019 - Madison, United States
Duration: 24 Jul 20191 Aug 2019

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