First Experimental Characterization of Microwave Emission from Cosmic Ray Air Showers

First Experimental Characterization of Microwave Emission from Cosmic Ray Air Showers

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 Cosmic-Ray Observation via Microwave Emission experiment have be...

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Veröffentlicht in:Physical review letters 2014-11, Vol.113 (22), p.221101-221101, Article 221101
Hauptverfasser: Smída, R, Werner, F, Engel, R, Arteaga-Velázquez, J C, Bekk, K, Bertaina, M, Blümer, J, Bozdog, H, Brancus, I M, Chiavassa, A, Cossavella, F, Di Pierro, F, Doll, P, Fuchs, B, Fuhrmann, D, Grupen, C, Haungs, A, Heck, D, Hörandel, J R, Huber, D, Huege, T, Kampert, K-H, Kang, D, Klages, H, Kleifges, M, Krömer, O, Link, K, Luczak, P, Ludwig, M, Mathes, H J, Mathys, S, Mayer, H J, Melissas, M, Morello, C, Neunteufel, P, Oehlschläger, J, Palmieri, N, Pekala, J, Pierog, T, Rautenberg, J, Rebel, H, Riegel, M, Roth, M, Salamida, F, Schieler, H, Schoo, S, Schröder, F G, Sima, O, Stasielak, J, Toma, G, Trinchero, G C, Unger, M, Weber, M, Weindl, A, Wilczyński, H, Will, M, Wochele, J, Zabierowski, J
Format: Artikel
Sprache:eng
Schlagworte:
Air showers
Cosmic rays
Emission
Frequency ranges
Microwave emission
Microwaves
Radio emission
Showers
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Zusammenfassung: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 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 polarized emission process in the GHz frequency range. The measurements show that microwave radiation offers a new means of studying air showers at E≥10^{17}  eV.
ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.113.221101