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首页> 外文期刊>Japanese journal of applied physics >A technology demonstration of propagator matrix power method for calculation of electron velocity distribution functions in gas in long-term transient and succeeding equilibrium states under dc electric fields
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A technology demonstration of propagator matrix power method for calculation of electron velocity distribution functions in gas in long-term transient and succeeding equilibrium states under dc electric fields

机译:直流电场下长期瞬态和后续平衡状态下气体电子速度分布函数的传播矩阵功率方法的技术演示

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摘要

A matrix-based calculation for the electron velocity distribution function (EVDF) in gas under dc electric field is demonstrated. The propagator matrix power method (PMPM) repeats squaring the propagator matrix P for its powers P-2, P-4, P-8, P-16,., up to a sufficient order of the power P-2S. P is a square matrix representing the change of EVDF due to the electron acceleration by an electric field and the electron scattering by gas molecules in a time step Delta t. With an initial EVDF f(t(0)) in a form of a column vector, a matrix product P-2S f(t(0)) gives the EVDF at t = t(0) + 2(S)Delta t. The PMPM enables us to observe the EVDF relaxation in a logarithmic time scale with a linear increase of the matrix squaring steps S. Features of the PMPM are discussed, and theoretically possible extensions to models under crossed electric and magnetic fields and ac electric field are investigated. (c) 2021 The Japan Society of Applied Physics
机译:对DC电场下的气体中的电子速度分布函数(EVDF)的基于基于矩阵的计算。 传播矩阵功率方法(PMPM)重复为其功率P-2,P-4,P-8,P-16的传播矩阵P平方,。,最多足够的功率P-2S的顺序。 p是表示由于电场的电子加速度和通过气体分子在时间步长ΔT的电子散射而导致EVDF的变化的方矩阵。 利用柱载体的形式的初始EVDF F(T(0)),矩阵产物P-2S F(T(0))在T = T(0)+ 2(S)ΔT处给出EVDF。 PMPM使我们能够在对数时间尺度中观察EVDF放松,以矩阵平方步骤S的线性增加。讨论了PMPM的特征,并研究了交叉电场和磁场下的模型的可能延伸 。 (c)2021日本应用物理学会

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