Polarization studies of the EAS radio emission with the LOPES experiment
Polarization studies of the EAS radio emission with the LOPES experiment
复制标题
使用 LOPES 实验进行 EAS 无线电发射的偏振研究
DOI：
--
复制
发表时间：
2009
期刊：
影响因子：
--
通讯作者：
P. G. Isar
中科院分区：
文献类型：
--
作者：
P. G. Isar
在大气中高能宇宙射线空气阵雨的发展过程中，带电粒子受到地磁场的偏转。这导致地球同步辐射，导致在地面上可观察到的短无线电信号。该模型预测了射电信号偏振对一般星雨参数的特征依赖性，并利用LOPES实验对这种依赖性进行了研究。LOPES是一组偶极子无线电天线，用于探测40-80 MHz频率范围内的无线电信号。LOPES位于地面粒子探测器阵列KASCADE-Grande区域，为10 16 -10 18 eV范围内的一次能量提供触发和校准良好的阵雨信息。为了研究极化，LOPES天线的一半面向东西方向，一半面向南北方向。在这项工作中，研究了信号极化随入风簇方向相对于地磁场的变化。
During the development of high-energy cosmic ray air showers in the atmosphere the charged particles are deflected by the geomagnetic field. This causes the geo-synchrotron emission leading to a short radio signal observable on ground. This model predicts characteristic dependences of the polarization of the radio signal on general shower parameters, and thus such dependences are investigated with the LOPES experiment. LOPES is an array of dipole radio antennas designed to detect such radio signals in the frequency range between 40-80 MHz. LOPES is located at the area of the ground particle detector array KASCADE-Grande providing the trigger and well-calibrated shower information for primary energies in the range of 10 16 -10 18 eV. For investigating the polarization, half of the LOPES antennas are orientated in east-west and respectively half in north-south direction. In this work, the variation of the polarization of the signal with the direction of the incoming air-shower with respect to the geomagnetic field is studied.