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

{"title":"Optical Imaging of Laser-Driven Fast Electron Weibel-like Filamentation in Overcritical Density Plasma","authors":"N. P. Dover, O. Tresca, N. Cook, O. C. Ettlinger, R. J. Kingham, C. Maharjan, M. N. Polyanskiy, P. Shkolnikov, I. Pogorelsky, Z. Najmudin","doi":"10.1103/physrevlett.134.025102","DOIUrl":null,"url":null,"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 n</a:mi></a:mrow>e</a:mi></a:mrow></a:msub>≃</a:mo>10</a:mn></a:mrow>25</a:mn></a:mrow></a:msup></a:mtext></a:mtext>m</a:mi></a:mrow>−</a:mo>3</a:mn></a:mrow></a:msup></a:mrow></a:math>, 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 <d:math xmlns:d=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><d:mrow><d:mn>800</d:mn><d:mtext> </d:mtext><d:mtext> </d:mtext><d:mi mathvariant=\"normal\">μ</d:mi><d:mi mathvariant=\"normal\">m</d:mi></d:mrow></d:math> with radii <h:math xmlns:h=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><h:mrow><h:mo>∼</h:mo><h:mn>10</h:mn><h:mtext> </h:mtext><h:mtext> </h:mtext><h:mi mathvariant=\"normal\">μ</h:mi><h:mi mathvariant=\"normal\">m</h:mi></h:mrow></h:math>. 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 <l:math xmlns:l=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><l:mo>∼</l:mo><l:mn>400</l:mn><l:mtext> </l:mtext><l:mtext> </l:mtext><l:mi>eV</l:mi></l:math> in the overcritical density plasma. Published by the American Physical Society 2025 ","PeriodicalId":20069,"journal":{"name":"Physical review letters","volume":"24 1","pages":""},"PeriodicalIF":8.1000,"publicationDate":"2025-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Physical review letters","FirstCategoryId":"101","ListUrlMain":"https://doi.org/10.1103/physrevlett.134.025102","RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"PHYSICS, MULTIDISCIPLINARY","Score":null,"Total":0}

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

查看原文

微信好友朋友圈 QQ好友复制链接

本刊更多论文

求助全文

约1分钟内获得全文去求助

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