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Localization of ionization-induced trapping in a laser wakefield accelerator using a density down-ramp

Hansson, M. LU ; Audet, T. L.; Ekerfelt, H. LU ; Aurand, B. LU ; Gallardo González, I. LU ; Desforges, F. G.; Davoine, X.; Maitrallain, A.; Reymond, S. and Monot, P., et al. (2016) In Plasma Physics and Controlled Fusion 58(5).
Abstract

We report on a study on controlled trapping of electrons, by field ionization of nitrogen ions, in laser wakefield accelerators in variable length gas cells. In addition to ionization-induced trapping in the density plateau inside the cells, which results in wide, but stable, electron energy spectra, a regime of ionization-induced trapping localized in the density down-ramp at the exit of the gas cells, is found. The resulting electron energy spectra are peaked, with 10% shot-to-shot fluctuations in peak energy. Ionization-induced trapping of electrons in the density down-ramp is a way to trap and accelerate a large number of electrons, thus improving the efficiency of the laser-driven wakefield acceleration.

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type
Contribution to journal
publication status
published
subject
keywords
down-ramp, ionization, laser, trapping, wakefield
in
Plasma Physics and Controlled Fusion
volume
58
issue
5
publisher
IOP Publishing
external identifiers
  • scopus:84965053099
  • wos:000375232300017
ISSN
0741-3335
DOI
10.1088/0741-3335/58/5/055009
language
English
LU publication?
yes
id
e7fd9744-146e-4bda-b22a-49e9fad6a621
date added to LUP
2016-10-04 08:38:35
date last changed
2017-10-08 04:53:04
@article{e7fd9744-146e-4bda-b22a-49e9fad6a621,
  abstract     = {<p>We report on a study on controlled trapping of electrons, by field ionization of nitrogen ions, in laser wakefield accelerators in variable length gas cells. In addition to ionization-induced trapping in the density plateau inside the cells, which results in wide, but stable, electron energy spectra, a regime of ionization-induced trapping localized in the density down-ramp at the exit of the gas cells, is found. The resulting electron energy spectra are peaked, with 10% shot-to-shot fluctuations in peak energy. Ionization-induced trapping of electrons in the density down-ramp is a way to trap and accelerate a large number of electrons, thus improving the efficiency of the laser-driven wakefield acceleration.</p>},
  articleno    = {055009},
  author       = {Hansson, M. and Audet, T. L. and Ekerfelt, H. and Aurand, B. and Gallardo González, I. and Desforges, F. G. and Davoine, X. and Maitrallain, A. and Reymond, S. and Monot, P. and Persson, Anna and Dobosz Dufrénoy, S. and Wahlström, C. G. and Cros, B. and Lundh, O.},
  issn         = {0741-3335},
  keyword      = {down-ramp,ionization,laser,trapping,wakefield},
  language     = {eng},
  month        = {03},
  number       = {5},
  publisher    = {IOP Publishing},
  series       = {Plasma Physics and Controlled Fusion},
  title        = {Localization of ionization-induced trapping in a laser wakefield accelerator using a density down-ramp},
  url          = {http://dx.doi.org/10.1088/0741-3335/58/5/055009},
  volume       = {58},
  year         = {2016},
}