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arXiv 1909.01945astro-ph.IM
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用于气射探测的射电仪器孔径模型

Modeling the Aperture of Radio Instruments for Air-Shower Detection

V. Lenok, P. Bezyazeekov, N. Budnev, O. Fedorov, O. Gress, O. Grishin, A. Haungs, T. Huege, Y. Kazarina, M. Kleifges, E. Korosteleva, D. Kostunin, L. Kuzmichev,… 展开作者

V. Lenok, P. Bezyazeekov, N. Budnev, O. Fedorov, O. Gress, O. Grishin, A. Haungs, T. Huege, Y. Kazarina, M. Kleifges, E. Korosteleva, D. Kostunin, L. Kuzmichev, N. Lubsandorzhiev, S. Malakhov, T. Marshalkina, R. Monkhoev, E. Osipova, A. Pakhorukov, L. Pankov, V. Prosin, F. G. Schröder, D. Shipilov, A. Zagorodnikov

摘要:

稀疏数字天线阵是未来大规模宇宙线观测站的一种很有前途的探测技术。最近已经表明,这种仪器可以提供一个分辨率的能量和簇射最大值的水平上的其他宇宙射线探测方法。由于在30至80 MHz的传统频带中空气簇射无线电发射的主导地磁性质,无线电信号的幅度和极化强烈地依赖于到达方向的方位角和天顶距。因此,天线阵列的效率和孔径的估计比粒子或切伦科夫光检测器更复杂。我们已经建立了一个新的效率模型的基础上利用横向分布函数作为淋浴模型,和概率处理的检测过程。将该模型与通卡射电扩展站(通卡-雷克斯)测量的数据进行比较,通卡射电扩展站是一个数字天线阵列,面积约为1公里,位于西伯利亚的通卡宇宙射线和伽马射线天文学高级仪器(TAIGA)的$^2$。通卡-雷克斯探测器利用空气-切伦科夫和粒子探测器的触发器探测空气簇射的无线电发射。本研究是通卡-雷克斯测量宇宙线通量的重要一步,对于一般空气簇射的射电测量是重要的。

英文摘要:

Sparse digital antenna arrays constitute a promising detection technique for future large-scale cosmic-ray observatories. It has recently been shown that this kind of instrumentation can provide a resolution of the energy and of the shower maximum on the level of other cosmic-ray detection methods. Due to the dominant geomagnetic nature of the air-shower radio emission in the traditional frequency band of 30 to 80 MHz, the amplitude and polarization of the radio signal strongly depend on the azimuth and zenith angle of the arrival direction. Thus, the estimation of the efficiency and subsequently of the aperture of an antenna array is more complex than for particle or Cherenkov-light detectors. We have built a new efficiency model based on utilizing a lateral distribution function as a shower model, and a probabilistic treatment of the detection process. The model is compared to the data measured by the Tunka Radio Extension (Tunka-Rex), a digital antenna array with an area of about 1 km$^2$ located in Siberia at the Tunka Advanced Instrument for Cosmic rays and Gamma Ray Astronomy (TAIGA). Tunka-Rex detects radio emission of air showers using trigger from air-Cherenkov and particle detectors. The present study is an essential step towards the measurement of the cosmic-ray flux with Tunka-Rex, and is important for radio measurements of air showers in general.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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