激光-固体相互作用中瞬态表面电流对低频辐射发射的比例调节

IF 2.1 2区物理与天体物理 Q2 PHYSICS, FLUIDS & PLASMAS

Plasma Physics and Controlled Fusion Pub Date : 2024-08-14 DOI:10.1088/1361-6587/ad6c7d

A P L Robinson

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引用次数: 0

摘要

有人认为，多兆赫快速电子引起的 "瞬态表面电流 "可能是超强激光与固体相互作用产生低频辐射（如太赫兹范围）的原因。我们对这一机制进行了分析，开发了强度、电场振幅和归一化矢量电势的解析上限，并根据一维电磁粒子池模拟进行了测试。瞬态表面电流 "机制是有效的，其效率足以完全解释迄今为止在实验中发射的所有辐射。

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Scaling of the emission of low frequency radiation by transient surface currents in laser–solid interactions

It has been suggested that ‘transient surface currents’ caused by multi-MeV fast electrons can be responsible for the emission of low frequency radiation (e.g. in THz range) from ultra-intense laser–solid interactions. This mechanism has been analyzed, and analytic upper bounds on the intensity, electric field amplitude, and normalized vector potential have been developed and tested against 1D EM Particle-in-Cell simulations. The ‘transient surface current’ mechanism is effective and sufficiently efficient to fully account for all radiation that has been emitted in experiments so far.

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来源期刊

Plasma Physics and Controlled Fusion 物理-物理：核物理

CiteScore

4.50

自引率

13.60%

发文量

224

审稿时长

4.5 months

期刊介绍： Plasma Physics and Controlled Fusion covers all aspects of the physics of hot, highly ionised plasmas. This includes results of current experimental and theoretical research on all aspects of the physics of high-temperature plasmas and of controlled nuclear fusion, including the basic phenomena in highly-ionised gases in the laboratory, in the ionosphere and in space, in magnetic-confinement and inertial-confinement fusion as well as related diagnostic methods. Papers with a technological emphasis, for example in such topics as plasma control, fusion technology and diagnostics, are welcomed when the plasma physics is an integral part of the paper or when the technology is unique to plasma applications or new to the field of plasma physics. Papers on dusty plasma physics are welcome when there is a clear relevance to fusion.