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20 April 2024

» arxiv » 1410.8291

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First Experimental Characterization of Microwave Emission from Cosmic Ray Air Showers
R. Smida ; F. Werner ; R. Engel ; J.C. Arteaga-Velazquez ; K. Bekk ; M. Bertaina ; J. Bluemer ; H. Bozdog ; I.M. Brancus ; A. Chiavassa ; F. Cossavella ; F. Di Pierro ; P. Doll ; B. Fuchs ; D. Fuhrmann ; C. Grupen ; A. Haungs ; D. Heck ; J.R. Hoerandel ; D. Huber ; T. Huege ; K.-H. Kampert ; D. Kang ; H. Klages ; M. Kleifges ; O. Kroemer ; K. Link ; P. Luczak ; M. Ludwig ; H.J. Mathes ; S. Mathys ; H.J. Mayer ; M. Melissas ; C. Morello ; P. Neunteufel ; J. Oehlschlaeger ; N. Palmieri ; J. Pekala ; T. Pierog ; J. Rautenberg ; H. Rebel ; M. Riegel ; M. Roth ; F. Salamida ; H. Schieler ; S. Schoo ; F.G. Schroeder ; O. Sima ; J. Stasielak ; G. Toma ; G.C. Trinchero ; M. Unger ; M. Weber ; A. Weindl ; H. Wilczynski ; M. Will ; J. Wochele ; J. Zabierowski ;
Date:	30 Oct 2014
Abstract:	We report the first direct measurement of the overall characteristics of microwave radio emission from extensive air showers. Using a trigger provided by the KASCADE-Grande air shower array, the signals of the microwave antennas of the CROME (Cosmic-Ray Observation via Microwave Emission) experiment have been read out and searched for signatures of radio emission by high-energy air showers in the GHz frequency range. Microwave signals have been detected for more than 30 showers with energies above 3*10^16 eV. The observations presented in this Letter are consistent with a mainly forward-directed and polarised emission process in the GHz frequency range. The measurements show that microwave radiation offers a new means of studying air showers at energies above 10^17 eV.
Source:	arXiv, 1410.8291
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