Gain of electron orbital angular momentum in a direct laser acceleration process

R. Nuter, Ph. Korneev, E. Dmitriev, I. Thiele, and V. T. Tikhonchuk
Phys. Rev. E 101, 053202 – Published 6 May 2020

Abstract

Three-dimensional “particle in cell” simulations show that a quasistatic magnetic field can be generated in a plasma irradiated by a linearly polarized Laguerre-Gauss beam with a nonzero orbital angular momentum (OAM). Perturbative analysis of the electron dynamics in the low intensity limit and detailed numerical analysis predict a laser to electrons OAM transfer. Plasma electrons gain angular velocity thanks to the dephasing process induced by the combined action of the ponderomotive force and the laser induced–radial oscillation. Similar to the “direct laser acceleration,” where Gaussian laser beams transmit part of its axial momentum to electrons, Laguerre-Gaussian beams transfer a part of their orbital angular momentum to electrons through the dephasing process.

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  • Received 12 November 2019
  • Revised 27 January 2020
  • Accepted 9 April 2020

DOI:https://doi.org/10.1103/PhysRevE.101.053202

©2020 American Physical Society

Physics Subject Headings (PhySH)

Plasma PhysicsParticles & Fields

Authors & Affiliations

R. Nuter1, Ph. Korneev2,3, E. Dmitriev2, I. Thiele4, and V. T. Tikhonchuk1,5

  • 1Université de Bordeaux, CNRS, CEA, UMR 5107, 33405 Talence, France
  • 2National Research Nuclear University “MEPhI”, Moscow 115409, Russian Federation
  • 3P.N. Lebedev Physical Institute, Moscow 119333, Russian Federation
  • 4Department of Physics, Chalmers University of Technology, SE-41296 Göteborg, Sweden
  • 5ELI-Beamlines, Institute of Physics, Czech Academy of Sciences, 25241 Dolni Brezany, Czech Republic

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Issue

Vol. 101, Iss. 5 — May 2020

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