Low frequency observations of cosmic ray air shower radio emission by CODALEMA/EXTASIS
Low frequency observations of cosmic ray air shower radio emission by CODALEMA/EXTASIS
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CODALEMA/EXTASIS 对宇宙射线空气簇射无线电发射的低频观测
DOI：
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
B. Revenu
中科院分区：
文献类型：
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作者：
A. Escudie;D. Charrier;R. Dallier;D. García;A. Lecacheux;L. Martin;B. Revenu
多年来，人们一直致力于了解[20-200] MHz范围内广泛空气簇射（EAS）的无线电发射。尽管一些研究直到90年代初才开始，[1-10] MHz频段仍然没有使用20年。然而，它已被测量这些开创性的实验和理论计算表明，EAS发射在这个波段的强电场，并有证据表明，在较低的频率无线电脉冲的幅度大幅增加。EXTASIS项目位于Nancay射电天文观测台内，由CODALEMA仪器支持，旨在研究[1-10] MHz波段，特别是所谓的“猝死”贡献，即到达地面后停止的粒子产生的预期辐射电场。我们提出我们的仪器设置，EXTASIS项目的目标和我们的第一个结果。
Over the years, significant efforts have been devoted to the understanding of the radio emission of extensive air shower (EAS) in the range [20-200] MHz. Despite some studies led until the early nineties, the [1-10] MHz band has remained unused for 20 years. However, it has been measured by these pioneering experiments and suggested by theoretical calculations that EAS emit a strong electric field in this band and that there is evidence of a large increase in the amplitude of the radio pulse at lower frequencies. The EXTASIS project, located within the radio astronomy observatory of Nancay and supported by the CODALEMA instrument, aims to study the [1-10] MHz band, and especially the so-called "Sudden Death" contribution, the expected radiation electric field created by the particles that are stopped upon arrival to the ground. We present our instrumental setup, the objectives of the EXTASIS project and our first results.