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A simple absorbing layer for EM‐radiation from a beam‐plasma interaction system
Author(s) -
Berendeev Evgeny,
Dudnikova Galina,
Efimova Anna,
Vshivkov Vitaly
Publication year - 2018
Publication title -
mathematical methods in the applied sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.719
H-Index - 65
eISSN - 1099-1476
pISSN - 0170-4214
DOI - 10.1002/mma.5253
Subject(s) - perfectly matched layer , finite difference time domain method , maxwell's equations , electromagnetic radiation , electromagnetic field , mathematics , attenuation , boundary value problem , mathematical analysis , plasma , radiation , attenuation coefficient , physics , computational physics , optics , quantum mechanics
In this paper, a problem of taking into account the electromagnetic radiation power in a numerical simulation of electron beam‐plasma interaction is considered. The numerical model is based on the particle‐in‐cell (PIC) method and the finite‐difference time‐domain (FDTD) scheme for solving Maxwell equations. As a boundary condition, it is proposed to use a simple layer of absorption, that is, artificial attenuation of an electromagnetic wave by multiplying the electromagnetic field in the boundary domain by a coefficient k < 1 depending on the distance to the boundary. The numerical experiments performed show that using such a layer for absorbing the electromagnetic radiation and for taking into account its power is efficient.