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在線閱讀 --自然科學版 2020年6期《高海拔地區廣延大氣簇射過程模擬與分析》
高海拔地區廣延大氣簇射過程模擬與分析--[在線閱讀]
徐致偉1,2, 范杰清1, 趙強2, 郝建紅1, 董志偉2, 張芳2, 薛碧曦1,2
1. 華北電力大學 電氣與電子工程學院, 北京 102206;
2. 北京應用物理與計算數學研究所, 北京 100094
起止頁碼: 486--492頁
DOI: 10.13763/j.cnki.jhebnu.nse.2020.06.005
摘要
研究了初始高能質子和電子入射條件下的廣延大氣簇射,當高能質子與電子穿越大氣層時與大氣組分發生相互作用,產生次級粒子,次級粒子能量足夠高時會在向下飛行時再次發生碰撞,產生新的次級粒子,從而形成級聯簇射.由于宇宙線初始能量極大,甚至可達1020eV,故其經廣延大氣簇射過程到達地表時粒子可能對地表電網等設施造成惡劣影響,因而該現象越發引起研究者的重視.利用蒙特卡洛方法模擬分析了到達高海拔近地觀測面的簇射射線中所包含的主要粒子種類、各種類粒子所占份額及其橫向分布情況.所得模擬結果為進一步分析其對高海拔地區高壓電網及敏感電氣設施的安全防護奠定理論基礎.

Simulation and Analysis on Extensive Air Showers on High Altitude Area
XU Zhiwei1,2, FAN Jieqing1, ZHAO Qiang2, HAO Jianhong1, DONG Zhiwei2, ZHANG Fang2, XUE Bixi1,2
1. School of Electrical and Electronic Engineering, North China Electric Power University, Beijing 102206, China;
2. Beijing Institute of Applied Physics and Computational Mathematics, Beijing 100094, China
Abstract:
We study the problem of extensive air showers(EAS) under the circumstances of initial high-energy proton and electron.In the process of high-energy proton and electron passing through the atmosphere,they interact with atmospheric atoms so that secondary particles are generated.When the energy of secondary particles is high enough,they will collide with atmospheric atoms again when flying downward and new secondary particles are generated,thus forming cascade shower.Because the initial energy of cosmic rays is extremely large,even up to 1020eV,particles reach the ground through EAS may have adverse effects on the ground power grid and other facilities,thus this phenomenon has attracted more and more attention of researchers.The Monte Carlo mothod is used to simulate the main particles contained in the shower reaching the high-altitude near-earth observation surface,the share of various types of particles,their energy spectrum,and their horizontal distribution.The simulation results lay a theoretical foundation for further analysis on its safety protection for high-voltage grids and sensitive electrical facilities in high altitude areas.

收稿日期: 2020-03-18
基金項目: 國家自然科學基金(U1730247,11571047,61372050)

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