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Laser-wakefield acceleration of monoenergetic electron beams in the first plasma-wave period

Mangles, SPD ; Thomas, AGR ; Kaluza, MC ; Lundh, Olle LU ; Lindau, Filip LU ; Persson, Anders LU ; Tsung, FS ; Najmudin, Z ; Mori, WB and Wahlström, Claes-Göran LU , et al. (2006) In Physical Review Letters 96(21).
Abstract
Beam profile measurements of laser-wakefield accelerated electron bunches reveal that in the monoenergetic regime the electrons are injected and accelerated at the back of the first period of the plasma wave. With pulse durations c tau >=lambda(p), we observe an elliptical beam profile with the axis of the ellipse parallel to the axis of the laser polarization. This increase in divergence in the laser polarization direction indicates that the electrons are accelerated within the laser pulse. Reducing the plasma density (decreasing c tau/lambda(p)) leads to a beam profile with less ellipticity, implying that the self-injection occurs at the rear of the first period of the plasma wave. This also demonstrates that the electron bunches are... (More)
Beam profile measurements of laser-wakefield accelerated electron bunches reveal that in the monoenergetic regime the electrons are injected and accelerated at the back of the first period of the plasma wave. With pulse durations c tau >=lambda(p), we observe an elliptical beam profile with the axis of the ellipse parallel to the axis of the laser polarization. This increase in divergence in the laser polarization direction indicates that the electrons are accelerated within the laser pulse. Reducing the plasma density (decreasing c tau/lambda(p)) leads to a beam profile with less ellipticity, implying that the self-injection occurs at the rear of the first period of the plasma wave. This also demonstrates that the electron bunches are less than a plasma wavelength long, i.e., have a duration < 25 fs. This interpretation is supported by 3D particle-in-cell simulations. (Less)
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publication status
published
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Physical Review Letters
volume
96
issue
21
publisher
American Physical Society
external identifiers
  • wos:000238004000023
  • scopus:33744525475
ISSN
1079-7114
DOI
10.1103/PhysRevLett.96.215001
language
English
LU publication?
yes
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963071be-f00a-4590-9430-9c8864c98eda (old id 406986)
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2016-04-01 12:26:56
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2020-07-29 02:23:15
@article{963071be-f00a-4590-9430-9c8864c98eda,
  abstract     = {Beam profile measurements of laser-wakefield accelerated electron bunches reveal that in the monoenergetic regime the electrons are injected and accelerated at the back of the first period of the plasma wave. With pulse durations c tau &gt;=lambda(p), we observe an elliptical beam profile with the axis of the ellipse parallel to the axis of the laser polarization. This increase in divergence in the laser polarization direction indicates that the electrons are accelerated within the laser pulse. Reducing the plasma density (decreasing c tau/lambda(p)) leads to a beam profile with less ellipticity, implying that the self-injection occurs at the rear of the first period of the plasma wave. This also demonstrates that the electron bunches are less than a plasma wavelength long, i.e., have a duration &lt; 25 fs. This interpretation is supported by 3D particle-in-cell simulations.},
  author       = {Mangles, SPD and Thomas, AGR and Kaluza, MC and Lundh, Olle and Lindau, Filip and Persson, Anders and Tsung, FS and Najmudin, Z and Mori, WB and Wahlström, Claes-Göran and Krushelnick, K},
  issn         = {1079-7114},
  language     = {eng},
  number       = {21},
  publisher    = {American Physical Society},
  series       = {Physical Review Letters},
  title        = {Laser-wakefield acceleration of monoenergetic electron beams in the first plasma-wave period},
  url          = {https://lup.lub.lu.se/search/ws/files/2927789/2425879.pdf},
  doi          = {10.1103/PhysRevLett.96.215001},
  volume       = {96},
  year         = {2006},
}