Fore-wake excitations from moving charged objects in a complex plasma
Fore-wake excitations from moving charged objects in a complex plasma
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复杂等离子体中移动带电物体的前唤醒激发
DOI：
10.1063/1.4964908
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发表时间：
2016
影响因子：
2.2
通讯作者：
A. Sen
中科院分区：
文献类型：
--
作者：
S. Tiwari;A. Sen
一个带电物体在等离子体中以超音速运动，在其尾流中产生了常见的马赫锥结构，但也可以引起非线性波激发提前it.Using分子动力学模拟，我们探索这种前尾流激发在强耦合尘埃等离子体和演示存在的前孤子脉冲和色散激波在该区域。的激发条件，以及这种脉冲的传播特性被描绘为一个函数的弹丸速度，等离子体密度，库仑耦合参数，和弹丸上的电荷量。我们的模拟结果提供了一个动力学的基础，早期的流体模型计算，也给洞察负责这样的激励，可以帮助在未来的实验和面向应用的研究的动力学过程。
A charged object moving at a supersonic speed in a plasma creates the familiar Mach cone structure in its wake but can also give rise to nonlinear wave excitations ahead of it. Using molecular dynamic simulations, we explore such fore-wake excitations in a strongly coupled dusty plasma and demonstrate the existence of precursor solitonic pulses and dispersive shock waves in that region. The excitation conditions as well as the propagation characteristics of such pulses are delineated as a function of the projectile velocity, the plasma density, the Coulomb coupling parameter, and the amount of charge on the projectile. Our simulation results provide a kinetic basis for earlier fluid model calculations and also give insights into the dynamical processes responsible for such excitations that can aid in future experimental and application oriented studies.
复杂等离子体中的尾流形成和尾流场效应
影响因子：
1.6
作者：
D. Block;J. Carstensen;P. Ludwig;W.J. Miloch;F. Greiner;A. Piel;M. Bonitz;A. Melzer
通讯作者：
A. Melzer