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dc.contributor.authorIñigo Gamiz, Lucas I
dc.contributor.authorErsfeld, Bernhard
dc.contributor.authorBrunetti, Enrico
dc.contributor.authorYoffe, Samuel R
dc.contributor.authorCairns, R Alan
dc.contributor.authorNoble, Adam
dc.contributor.authorHolt, George K
dc.contributor.authorJaroszynski, Dino A
dc.identifier.citationIñigo Gamiz , L I , Ersfeld , B , Brunetti , E , Yoffe , S R , Cairns , R A , Noble , A , Holt , G K & Jaroszynski , D A 2021 , ' Microstructure formation in radially counterstreaming electron flows ' , New Journal of Physics , vol. 23 , no. 4 , 043017 .
dc.identifier.otherPURE: 273717374
dc.identifier.otherPURE UUID: ca662798-3043-46c0-8633-54a87e506e01
dc.identifier.otherJisc: 017796f27cef4b1e96925cfdc3008c04
dc.identifier.otherpublisher-id: njpabe8f6
dc.identifier.othermanuscript: abe8f6
dc.identifier.otherother: njp-112543.r2
dc.identifier.otherWOS: 000637835900001
dc.identifier.otherScopus: 85104568268
dc.descriptionWe acknowledge the support of the UK EPSRC, Grant Number EP/N028694/1, and the EC's Laserlab-Europe H2020 EC-GA Nos. 654148 and 871124.en
dc.description.abstractA theoretical model is developed to describe the formation of microstructures due to plasma streaming instabilities in radially convergent geometries. Microstructures in the form of radial spokes are found experimentally in laser wakefield accelerators. The eigenvalues of a set of coupled linear ordinary differential equations are obtained and the complex wavenumbers calculated to give the local growth rates. The predictions are confirmed using particle-in-cell (PIC) simulations carried out for two counter-propagating converging/diverging plasma annuli. The simulations consistently demonstrate unstable growth for interactions between two counterpropagating annuli with different number densities. The growth rates obtained from the PIC simulations agree well with the growth rates from the semi-analytical model. The theory presented in this paper can provide powerful insight into converging plasma beams found in space and laboratory scale plasma.
dc.relation.ispartofNew Journal of Physicsen
dc.rightsCopyright © 2021 The Author(s). Published by IOP Publishing Ltd on behalf of the Institute of Physics and Deutsche Physikalische Gesellschaft. Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.en
dc.subjectPlasma microstructuresen
dc.subjectPlasma instabilitiesen
dc.subjectStreaming instabilitiesen
dc.subjectWakefield acceleratoren
dc.subjectQC Physicsen
dc.subjectTK Electrical engineering. Electronics Nuclear engineeringen
dc.titleMicrostructure formation in radially counterstreaming electron flowsen
dc.typeJournal articleen
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews. Statisticsen
dc.contributor.institutionUniversity of St Andrews. Applied Mathematicsen
dc.description.statusPeer revieweden

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