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A Novel Method to Simulate the High‐Altitude Nuclear Electromagnetic Pulse Under the Asymmetrical Situation
Author(s) -
Zhang Jin,
Zhang YeRong
Publication year - 2020
Publication title -
radio science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.371
H-Index - 84
eISSN - 1944-799X
pISSN - 0048-6604
DOI - 10.1029/2019rs006840
Subject(s) - physics , electromagnetic pulse , radiation , pulse (music) , electromagnetic radiation , line of sight , computational physics , current (fluid) , point source , electric current , altitude (triangle) , integral equation , planar , optics , mathematics , computer science , mathematical analysis , geometry , astrophysics , thermodynamics , computer graphics (images) , quantum mechanics , detector
The zero‐order integral equation method (IEM) and the second‐order IEM were introduced to simulate the high‐altitude electromagnetic pulse (HEMP) in our former reports, where the planar gamma radiation model and the point gamma radiation model were utilized, respectively. Herein, the equation of the IEM is analyzed and simplified, after which the fifth‐order method is introduced. Several asymmetric gamma radiation patterns are employed to simulate the asymmetric environments. The results show that the fifth‐order method can well describe the tendency of the variation of the electric current source in the deposition region and that the HEMP radiating onto the ground not only depends on the electric current source along the line of sight (LOS) but also depends on the distribution of the electric current source around the LOS.