Multiple self-injection in the acceleration of monoenergetic electrons by a laser wake field

A. Oguchi, A. Zhidkov, Ken'ichi Takano, E. Hotta, K. Nemoto, K. Nakajima

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Abstract

Multiple electron self-injection in laser wake-field acceleration is studied via fully relativistic two- and three-dimensional particle-in-cell simulation. The electron density modulation in the laser wake originating from oscillations of the laser pulse waist and relativistic effects can provoke the parametric resonance in the electron fluid momentum. This may result in repetitive trapping of plasma electrons in the acceleration phase of the laser wake: multiple electron self-injection. The maximal energy of the accelerated electrons depends strongly on the total charge of the injected electrons. A low energy spread, less than 1%, for an almost 1 GeV energy electron beam with charge about 10 pC is found numerically in the plasma channel irradiated by a 25 TW laser pulse, while a 200 TW laser pulse produces a few nC beam with only 150 MeV energy. Essentially thermalization of accelerated electrons is also a result of charge loading.

Original languageEnglish
Article number043102
JournalPhysics of Plasmas
Volume15
Issue number4
DOIs
Publication statusPublished - 2008
Externally publishedYes

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ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Condensed Matter Physics

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