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Article Dans Une Revue Phys.Rev.X Année : 2019

Direct observation of plasma waves and dynamics induced by laser-accelerated electron beams

M.F. Gilljohann
  • Fonction : Auteur
H. Ding
  • Fonction : Auteur
A. Döpp
  • Fonction : Auteur
J. Götzfried
  • Fonction : Auteur
S. Schindler
  • Fonction : Auteur
G. Schilling
  • Fonction : Auteur
S. Corde
A. Debus
  • Fonction : Auteur
T. Heinemann
  • Fonction : Auteur
B. Hidding
  • Fonction : Auteur
S.M. Hooker
  • Fonction : Auteur
A. Irman
  • Fonction : Auteur
T. Kurz
  • Fonction : Auteur
A. Martinez de La Ossa
  • Fonction : Auteur
U. Schramm
  • Fonction : Auteur
S. Karsch
  • Fonction : Auteur

Résumé

Plasma wakefield acceleration (PWFA) is a novel acceleration technique with promising prospects for both particle colliders and light sources. However, PWFA research has so far been limited to a few large-scale accelerator facilities worldwide. Here, we present first results on plasma wakefield generation using electron beams accelerated with a 100-TW-class Ti:sapphire laser. Because of their ultrashort duration and high charge density, the laser-accelerated electron bunches are suitable to drive plasma waves at electron densities in the order of 1019  cm-3. We capture the beam-induced plasma dynamics with femtosecond resolution using few-cycle optical probing and, in addition to the plasma wave itself, we observe a distinctive transverse ion motion in its trail. This previously unobserved phenomenon can be explained by the ponderomotive force of the plasma wave acting on the ions, resulting in a modulation of the plasma density over many picoseconds. Because of the scaling laws of plasma wakefield generation, results obtained at high plasma density using high-current laser-accelerated electron beams can be readily scaled to low-density systems. Laser-driven PWFA experiments can thus act as miniature models for their larger, conventional counterparts. Furthermore, our results pave the way towards a novel generation of laser-driven PWFA, which can potentially provide ultralow emittance beams within a compact setup.
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Dates et versions

hal-01929120 , version 1 (06-08-2020)

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Citer

M.F. Gilljohann, H. Ding, A. Döpp, J. Götzfried, S. Schindler, et al.. Direct observation of plasma waves and dynamics induced by laser-accelerated electron beams. Phys.Rev.X, 2019, 9 (1), pp.011046. ⟨10.1103/PhysRevX.9.011046⟩. ⟨hal-01929120⟩
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