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Physics of Plasmas / Volume 13 / Issue 9 / ARTICLES / Basic Plasma Phenomena, Waves, Instabilities

Phys. Plasmas 13, 092109 (2006); http://dx.doi.org/10.1063/1.2345580 (5 pages)

A comparison of ultrarelativistic electron- and positron-bunch propagation in plasmas

C. T. Zhou1, X. T. He2, and M. Y. Yu3

1Institute of Applied Physics and Computational Mathematics, P. O. Box 8009, Beijing 100088, People's Republic of China
2Institute of Applied Physics and Computational Mathematics, P. O. Box 8009, Beijing 100088, People’s Republic of China and Department of Physics, Zhejiang University, Hangzhou 310027, People's Republic of China
3Institut für Theoretische Physik I, Ruhr-Universität Bochum, D-44780 Bochum, Germany

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(Received 5 June 2006; accepted 8 August 2006; published online 12 September 2006)

Beam-driven acceleration of electrons and positrons by the electric field of the plasma wakefield is considered in detail using a self-consistent relativistic cylindrical particle-in-cell code with implicit electromagnetic solver. The plasma characteristics, such as the particle motion, the density, the temperatures, the wake fields, and the energies and their transfer, are investigated. Strong local energization and heating of the plasma electrons are observed. Small groups of ions in the wake can also attain temperatures higher than the secondary ionization potential of lithium vapor. It is verified that an electron bunch indeed excites a wakefield of higher energy than a positron bunch, which, in fact, behaves like a negative charge plasma bunch because of the suck-in of background plasma electrons.

© 2006 American Institute of Physics

Article Outline

  1. INTRODUCTION
  2. NUMERICAL SIMULATION
  3. ELECTRON ENERGIZATION BY CHARGED BUNCHES
  4. DISCUSSION

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KEYWORDS and PACS

Keywords

relativistic electron beams, plasma-beam interactions, relativistic plasmas, plasma simulation, plasma transport processes, plasma density, plasma temperature, plasma heating, ionisation

PACS

  • 52.65.Rr

    Particle-in-cell method

  • 52.40.Mj

    Particle beam interactions in plasmas

  • 41.75.Ht

    Relativistic electron and positron beams

  • 41.75.Lx

    Other advanced accelerator concepts

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.2345580

PUBLICATION DATA

ISSN

1070-664X (print)  
1089-7674 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

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