Divergence of the energy-losing rate of charged particles in plasmas

In modeling the charged alpha particle transport in hot-spot plasmas of inertial confinement fusion, the energy-losing rate is a major concern in the Monte Carlo simulations of alpha particle transport of a radiative-hydrodynamic code. However, the traditionally used energy stopping-power only descr...

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Veröffentlicht in:Physics of plasmas 2024-06, Vol.31 (6)
Hauptverfasser: Du, Bao, Kang, Dongguo, Li, Kai, Zhang, Wenshuai, Zou, Shiyang, Deng, Luan, Cai, Hongbo, Zhu, Shaoping
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container_issue 6
container_start_page
container_title Physics of plasmas
container_volume 31
creator Du, Bao
Kang, Dongguo
Li, Kai
Zhang, Wenshuai
Zou, Shiyang
Deng, Luan
Cai, Hongbo
Zhu, Shaoping
description In modeling the charged alpha particle transport in hot-spot plasmas of inertial confinement fusion, the energy-losing rate is a major concern in the Monte Carlo simulations of alpha particle transport of a radiative-hydrodynamic code. However, the traditionally used energy stopping-power only describes the averaged energy-losing rate of the incident charged particles, whereas the variance of the energy exchange with the background particles is generally ignored. In this paper, the variance of charged particle collisions is studied by both analytical derivation and Monte Carlo simulations. An expression of the divergence of the charged particle energy-losing rate is given for the first time, which can be directly used for practical estimations. It indicates that when the areal density of the target particles along the incident particle path length is low, the divergence of the lost energy would be much larger than the average value, and the traditionally used energy stopping-power would be no longer sufficient to describe the charged particle Coulomb collisions. It helps to obtain a more comprehensive understanding about the charged particle transport in plasmas.
doi_str_mv 10.1063/5.0207504
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subjects Alpha particles
Alpha rays
Charged particles
Coulomb collisions
Energy
Inertial confinement fusion
Monte Carlo simulation
Particle collisions
Particle energy
Plasmas (physics)
Stopping power
title Divergence of the energy-losing rate of charged particles in plasmas
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