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首页> 外文期刊>PHYSICAL REVIEW E >Ion-beam–plasma interaction effects on electrostatic solitary wave propagation in ultradense relativistic quantum plasmas
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Ion-beam–plasma interaction effects on electrostatic solitary wave propagation in ultradense relativistic quantum plasmas

机译：离子束 - 等离子体相互作用对静电相对主义量子等离子体静电孤立波传播的影响

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摘要

Understanding the transport properties of charged particle beams is important not only from a fundamental point of view but also due to its relevance in a variety of applications. A theoretical model is established in this article, to model the interaction of a tenuous positively charged ion beam with an ultradense quantum electron-ion plasma, by employing a rigorous relativistic quantum-hydrodynamic (fluid plasma) electrostatic model proposed in McKerr et al. [M. McKerr, F. Haas, and I. Kourakis, Phys. Rev. E 90, 033112 (2014)]. A nonlinear analysis is carried out to elucidate the propagation characteristics and the existence conditions of large amplitude electrostatic solitary waves propagating in the plasma in the presence of the beam. Anticipating stationary profile excitations, a pseudomechanical energy balance formalism is adopted to reduce the fluid evolution equation to an ordinary differential equation. Exact solutions are thus obtained numerically, predicting localized excitations (pulses) for all of the plasma state variables, in response to an electrostatic potential disturbance. An ambipolar electric field form is also obtained. Thorough analysis of the reality conditions for all variables is undertaken in order to determine the range of allowed values for the solitonic pulse speed and how it varies as a function of the beam characteristics (beam velocity and density).
机译：理解带电粒子束的运输特性不仅重要，而且很重要，而且是由于其在各种应用中的相关性。在本文中建立了理论模型，以通过采用McKERT等人提出的严格相对论的量子 - 流体动力学（流体等离子体）静电模型来模拟具有超响量子电子离子等离子体的脆性正电荷离子束的相互作用。 [M. McKerr，F. Haas，以及我。 Rev. E 90,033112（2014）]。进行非线性分析以阐明在梁存在下在等离子体中传播的大幅度静电孤立波的传播特性和存在条件。期望静止的简档激励，采用伪机械能量平衡形式主义来减少普通微分方程的流体演化方程。因此，响应于静电势扰动，以数值方式在数字上获得精确的解决方案，以预测所有等离子体状态变量的局部激发（脉冲）。还获得了Ambipolar电场形式。对所有变量的现实条件进行彻底分析，以确定孤子脉冲速度的允许值的范围以及如何随着光束特性（梁速度和密度）的函数而变化。

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  • 来源
    《PHYSICAL REVIEW E》 |2017年第4期|043206.1-043206.13|共13页
  • 作者

    I. S. Elkamash; I. Kourakis; F. Haas;

  • 作者单位

    Centre for Plasma Physics Queen’s University Belfast Belfast BT7 1NN Northern Ireland United Kingdom Physics Department Faculty of Science Mansoura University 35516 Mansoura Egypt;

    Centre for Plasma Physics Queen’s University Belfast Belfast BT7 1NN Northern Ireland United Kingdom;

    Instituto de Fisica Universidade Federal do Rio Grande do Sul Avenida Bento Goncalves 9500 CEP 91501-970 Porto Alegre Rio Grande do Sul Brazil;

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