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Pitch Angle Measurement Method based on Detector Counts Distribution. -I. Basic conception

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Main Authors:	Wang, Chenwei, Xiong, Shaolin, Xue, Hongbo, Zhang, Yiteng, Ye, Shanzhi, Xu, Wei, Zhang, Jinpeng, An, Zhenghua, Cai, Ce, Feng, Peiyi, Gong, Ke, Guo, Haoxuan, Huang, Yue, Li, Xinqiao, Liu, Jiacong, Liu, Xiaojing, Ma, Xiang, Song, Liming, Tan, Wenjun, Wang, Jin, Wang, Ping, Wang, Yue, Wen, Xiangyang, Xiao, Shuo, Xie, Shenlun, Xu, Yanbing, Xue, Wangchen, Yang, Sheng, Yu, Zhenghang, Zhang, Dali, Zhang, Wenlong, Zhang, Peng, Zhang, Shuangnan, Zhang, Yanqiu, Zhang, Yanting, Zhang, Zhen, Zhao, Xiaoyun, Zheng, Chao, Zheng, Shijie
Format:	Preprint
Published:	2025
Subjects:	Instrumentation and Methods for Astrophysics Space Physics
Online Access:	Acceder al recurso
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_version_	1866908356477714432
author	Wang, Chenwei Xiong, Shaolin Xue, Hongbo Zhang, Yiteng Ye, Shanzhi Xu, Wei Zhang, Jinpeng An, Zhenghua Cai, Ce Feng, Peiyi Gong, Ke Guo, Haoxuan Huang, Yue Li, Xinqiao Liu, Jiacong Liu, Xiaojing Ma, Xiang Song, Liming Tan, Wenjun Wang, Jin Wang, Ping Wang, Yue Wen, Xiangyang Xiao, Shuo Xie, Shenlun Xu, Yanbing Xue, Wangchen Yang, Sheng Yu, Zhenghang Zhang, Dali Zhang, Wenlong Zhang, Peng Zhang, Shuangnan Zhang, Yanqiu Zhang, Yanting Zhang, Zhen Zhao, Xiaoyun Zheng, Chao Zheng, Shijie
author_facet	Wang, Chenwei Xiong, Shaolin Xue, Hongbo Zhang, Yiteng Ye, Shanzhi Xu, Wei Zhang, Jinpeng An, Zhenghua Cai, Ce Feng, Peiyi Gong, Ke Guo, Haoxuan Huang, Yue Li, Xinqiao Liu, Jiacong Liu, Xiaojing Ma, Xiang Song, Liming Tan, Wenjun Wang, Jin Wang, Ping Wang, Yue Wen, Xiangyang Xiao, Shuo Xie, Shenlun Xu, Yanbing Xue, Wangchen Yang, Sheng Yu, Zhenghang Zhang, Dali Zhang, Wenlong Zhang, Peng Zhang, Shuangnan Zhang, Yanqiu Zhang, Yanting Zhang, Zhen Zhao, Xiaoyun Zheng, Chao Zheng, Shijie
contents	As an X-ray and gamma-ray all-sky monitor aiming for high energy astrophysical transients, Gravitational-wave high-energy Electromagnetic Counterpart All-sky Monitor (GECAM) has also made a series of observational discoveries on burst events of gamma-rays and particles in the low Earth orbit. Pitch angle is one of the key parameters of charged particles traveling around geomagnetic field. However, the usage of the GECAM-style instruments to measure the pitch angle of charged particles is still lacking. Here we propose a novel method for GECAM and similar instruments to measure the pitch angle of charged particles based on detector counts distribution. The basic conception of this method and simulation studies are described. With this method, the pitch angle of a peculiar electron precipitation event detected by GECAM-C is derived to be about 90$^\circ$, demonstrating the feasibility of our method. We note that the application of this method on GECAM-style instruments may open a new window for studying space particle events, such as Terrestrial Electron Beams (TEBs) and Lightning-induced Electron Precipitations (LEPs).
format	Preprint
id	arxiv_https___arxiv_org_abs_2505_06167
institution	arXiv
publishDate	2025
record_format	arxiv
spellingShingle	Pitch Angle Measurement Method based on Detector Counts Distribution. -I. Basic conception Wang, Chenwei Xiong, Shaolin Xue, Hongbo Zhang, Yiteng Ye, Shanzhi Xu, Wei Zhang, Jinpeng An, Zhenghua Cai, Ce Feng, Peiyi Gong, Ke Guo, Haoxuan Huang, Yue Li, Xinqiao Liu, Jiacong Liu, Xiaojing Ma, Xiang Song, Liming Tan, Wenjun Wang, Jin Wang, Ping Wang, Yue Wen, Xiangyang Xiao, Shuo Xie, Shenlun Xu, Yanbing Xue, Wangchen Yang, Sheng Yu, Zhenghang Zhang, Dali Zhang, Wenlong Zhang, Peng Zhang, Shuangnan Zhang, Yanqiu Zhang, Yanting Zhang, Zhen Zhao, Xiaoyun Zheng, Chao Zheng, Shijie Instrumentation and Methods for Astrophysics Space Physics As an X-ray and gamma-ray all-sky monitor aiming for high energy astrophysical transients, Gravitational-wave high-energy Electromagnetic Counterpart All-sky Monitor (GECAM) has also made a series of observational discoveries on burst events of gamma-rays and particles in the low Earth orbit. Pitch angle is one of the key parameters of charged particles traveling around geomagnetic field. However, the usage of the GECAM-style instruments to measure the pitch angle of charged particles is still lacking. Here we propose a novel method for GECAM and similar instruments to measure the pitch angle of charged particles based on detector counts distribution. The basic conception of this method and simulation studies are described. With this method, the pitch angle of a peculiar electron precipitation event detected by GECAM-C is derived to be about 90$^\circ$, demonstrating the feasibility of our method. We note that the application of this method on GECAM-style instruments may open a new window for studying space particle events, such as Terrestrial Electron Beams (TEBs) and Lightning-induced Electron Precipitations (LEPs).
title	Pitch Angle Measurement Method based on Detector Counts Distribution. -I. Basic conception
topic	Instrumentation and Methods for Astrophysics Space Physics
url	https://arxiv.org/abs/2505.06167