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Laser-plasma electron acceleration in dielectric capillary tubes

Genoud, Guillaume LU ; Cassou, K.; Wojda, F.; Ferrari, H. E.; Kamperidis, Christos LU ; Burza, Matthias LU ; Persson, A; Uhlig, Jens LU ; Kneip, S. and Mangles, S. P. D., et al. (2011) In Applied Physics B 105(2). p.309-316
Abstract
Electron beams and betatron X-ray radiation generated by laser wakefield acceleration in long plasma targets are studied. The targets consist of hydrogen filled dielectric capillary tubes of diameter 150 to 200 microns and length 6 to 20 mm. Electron beams are observed for peak laser intensities as low as 5x10(17) W/cm(2). It is found that the capillary collects energy outside the main peak of the focal spot and contributes to keep the beam self-focused over a distance longer than in a gas jet of similar density. This enables the pulse to evolve enough to reach the threshold for wavebreaking, and thus trap and accelerate electrons. No electrons were observed for capillaries of large diameter (250 mu m), confirming that the capillary... (More)
Electron beams and betatron X-ray radiation generated by laser wakefield acceleration in long plasma targets are studied. The targets consist of hydrogen filled dielectric capillary tubes of diameter 150 to 200 microns and length 6 to 20 mm. Electron beams are observed for peak laser intensities as low as 5x10(17) W/cm(2). It is found that the capillary collects energy outside the main peak of the focal spot and contributes to keep the beam self-focused over a distance longer than in a gas jet of similar density. This enables the pulse to evolve enough to reach the threshold for wavebreaking, and thus trap and accelerate electrons. No electrons were observed for capillaries of large diameter (250 mu m), confirming that the capillary influences the interaction and does not have the same behaviour as a gas cell. Finally, X-rays are used as a diagnostic of the interaction and, in particular, to estimate the position of the electrons trapping point inside the capillary. (Less)
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publication status
published
subject
in
Applied Physics B
volume
105
issue
2
pages
309 - 316
publisher
Springer
external identifiers
  • wos:000295938100020
  • scopus:84855590271
ISSN
0946-2171
DOI
10.1007/s00340-011-4639-4
language
English
LU publication?
yes
id
9bc89cc3-eae2-4a0f-9ae1-274df31f6526 (old id 2212088)
date added to LUP
2011-11-23 15:41:26
date last changed
2017-01-01 03:58:14
@article{9bc89cc3-eae2-4a0f-9ae1-274df31f6526,
  abstract     = {Electron beams and betatron X-ray radiation generated by laser wakefield acceleration in long plasma targets are studied. The targets consist of hydrogen filled dielectric capillary tubes of diameter 150 to 200 microns and length 6 to 20 mm. Electron beams are observed for peak laser intensities as low as 5x10(17) W/cm(2). It is found that the capillary collects energy outside the main peak of the focal spot and contributes to keep the beam self-focused over a distance longer than in a gas jet of similar density. This enables the pulse to evolve enough to reach the threshold for wavebreaking, and thus trap and accelerate electrons. No electrons were observed for capillaries of large diameter (250 mu m), confirming that the capillary influences the interaction and does not have the same behaviour as a gas cell. Finally, X-rays are used as a diagnostic of the interaction and, in particular, to estimate the position of the electrons trapping point inside the capillary.},
  author       = {Genoud, Guillaume and Cassou, K. and Wojda, F. and Ferrari, H. E. and Kamperidis, Christos and Burza, Matthias and Persson, A and Uhlig, Jens and Kneip, S. and Mangles, S. P. D. and Lifschitz, A. and Cros, B. and Wahlström, Claes-Göran},
  issn         = {0946-2171},
  language     = {eng},
  number       = {2},
  pages        = {309--316},
  publisher    = {Springer},
  series       = {Applied Physics B},
  title        = {Laser-plasma electron acceleration in dielectric capillary tubes},
  url          = {http://dx.doi.org/10.1007/s00340-011-4639-4},
  volume       = {105},
  year         = {2011},
}