Optical Imaging of Laser-Driven Fast Electron Weibel-like Filamentation in Overcritical Density Plasma

IF 8.1 1区物理与天体物理 Q1 PHYSICS, MULTIDISCIPLINARY

Physical review letters Pub Date : 2025-01-17 DOI:10.1103/physrevlett.134.025102

N. P. Dover, O. Tresca, N. Cook, O. C. Ettlinger, R. J. Kingham, C. Maharjan, M. N. Polyanskiy, P. Shkolnikov, I. Pogorelsky, Z. Najmudin

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引用次数: 0

Abstract

We report on the measurement of filamented transport of laser-generated fast electron beams in near-critical density plasma. A relativistic intensity long-wave-infrared laser irradiated a hydrodynamically shaped helium gas flow at an electron density ne≃1025m−3, generating a large flux of fast electrons that propagated beyond the critical surface. The beam-to-background electron density ratio was sufficiently high to drive growth of Weibel-like filamentation, which was measured by optical probing to extend up to 800 μm with radii ∼10 μm. Particle-in-cell simulations reproduce the main features of the filamentation generation, suggesting that collisionless processes are dominant in these interactions. Expansion of the filaments after formation infers a fast electron heated plasma temperature ∼400 eV in the overcritical density plasma.

Published by the American Physical Society

2025

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超临界密度等离子体中激光驱动快速电子维贝尔状灯丝的光学成像

本文报道了近临界密度等离子体中激光产生的快电子束的丝状输运的测量。利用相对论强度长波红外激光照射一个电子密度为ne≃1025m−3的流体动力型氦气，产生了大量快速电子，并在临界表面外传播。光束与背景的电子密度比足够高，足以驱动weibel状灯丝的生长，通过光学探针测量，该灯丝延伸至800 μm，半径为10 μm。细胞内粒子模拟再现了成丝产生的主要特征，表明无碰撞过程在这些相互作用中占主导地位。细丝形成后的膨胀推断出在过临界密度等离子体中有一个快速的电子加热等离子体温度~ 400 eV。2025年由美国物理学会出版

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Physical review letters 物理-物理：综合

CiteScore

16.50

自引率

7.00%

发文量

2673

审稿时长

2.2 months

期刊介绍： Physical review letters(PRL)covers the full range of applied, fundamental, and interdisciplinary physics research topics: General physics, including statistical and quantum mechanics and quantum information Gravitation, astrophysics, and cosmology Elementary particles and fields Nuclear physics Atomic, molecular, and optical physics Nonlinear dynamics, fluid dynamics, and classical optics Plasma and beam physics Condensed matter and materials physics Polymers, soft matter, biological, climate and interdisciplinary physics, including networks