点燃等离子体的电热丝化

IF 2.4 3区 物理与天体物理 Q1 Mathematics
H. Martin, R. W. Paddock, M. W. von der Leyen, V. Eliseev, R. T. Ruskov, R. Timmis, J. J. Lee, A. James, P. A. Norreys
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引用次数: 0

摘要

稠热等离子体容易受到电热不稳定性的影响:碰撞过程允许电子流中的温度扰动增长。本文表明,将一个由两个对立电流和一个移动离子背景组成的系统线性化为三种不同的流体,会产生不稳定模式,当波数低于阈值 kth 时,不稳定模式的增长率很快(∼1013s-1)。推导出了一个分析阈值条件,对于典型的热点和壳参数,该阈值条件已被超越。粒子内模拟成功地对预测的生长率和阈值行为进行了基准测试。壳内的电热丝将影响燃烧波向冷燃料的传播以及由此产生的燃烧动力学。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Electrothermal filamentation of igniting plasmas

Electrothermal filamentation of igniting plasmas
Dense, hot plasmas are susceptible to the electrothermal instability: a collisional process which permits temperature perturbations in electron currents to grow. It is shown here that linearizing a system comprised of two opposing currents and a mobile ion background as three distinct fluids yields unstable modes with rapid growth rates (1013s1) for wavenumbers below a threshold kth. An analytical threshold condition is derived, this being surpassed for typical hot-spot and shell parameters. Particle-in-cell simulations successfully benchmark the predicted growth rates and threshold behavior. Electrothermal filamentation within the shell will impact the burn wave propagation into the cold fuel and resulting burn dynamics.
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来源期刊
Physical review. E
Physical review. E 物理-物理:流体与等离子体
CiteScore
4.60
自引率
16.70%
发文量
0
审稿时长
3.3 months
期刊介绍: Physical Review E (PRE), broad and interdisciplinary in scope, focuses on collective phenomena of many-body systems, with statistical physics and nonlinear dynamics as the central themes of the journal. Physical Review E publishes recent developments in biological and soft matter physics including granular materials, colloids, complex fluids, liquid crystals, and polymers. The journal covers fluid dynamics and plasma physics and includes sections on computational and interdisciplinary physics, for example, complex networks.
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