宇宙射线空气簇射微波辐射的首次实验表征。
First Experimental Characterization of Microwave Emission from Cosmic Ray Air Showers.
作者信息
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
机构信息
Karlsruhe Institute of Technology (KIT), 76021 Karlsruhe, Germany.
Universidad Michoacana, Instituto de Física y Matemáticas, 58040 Morelia, Mexico.
出版信息
Phys Rev Lett. 2014 Nov 28;113(22):221101. doi: 10.1103/PhysRevLett.113.221101. Epub 2014 Nov 26.
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.
我们报告了对广延大气簇射微波辐射整体特征的首次直接测量。利用KASCADE-Grande大气簇射阵列提供的触发信号，读出了通过微波辐射进行宇宙射线观测实验中微波天线的信号，并在GHz频率范围内搜索高能大气簇射的无线电发射特征。已检测到30多个能量高于3×10^{16} eV的簇射的微波信号。本信函中展示的观测结果与GHz频率范围内主要向前定向和极化的发射过程一致。测量结果表明，微波辐射为研究能量E≥10^{17} eV的大气簇射提供了一种新方法。
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