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Study of electron acceleration and x-ray radiation as a function of plasma density in capillary-guided laser wakefield accelerators

Ju, J. ; Svensson, Kristoffer LU ; Ferrari, H. ; Doepp, A. ; Genoud, Guillaume LU ; Wojda, Franck LU ; Burza, Matthias LU ; Persson, Anders LU ; Lundh, Olle LU orcid and Wahlström, Claes-Göran LU , et al. (2013) In Physics of Plasmas 20(8).
Abstract
Laser wakefield electron acceleration in the blow-out regime and the associated betatron X-ray radiation were investigated experimentally as a function of the plasma density in a configuration where the laser is guided. Dielectric capillary tubes were employed to assist the laser keeping self-focused over a long distance by collecting the laser energy around its central focal spot. With a 40 fs, 16 TW pulsed laser, electron bunches with tens of pC charge were measured to be accelerated to an energy up to 300 MeV, accompanied by X-ray emission with a peak brightness of the order of 10 21 ph/s/mm(2)/mrad(2)/0.1%BW. Electron trapping and acceleration were studied using the emitted X-ray beam distribution to map the acceleration process; the... (More)
Laser wakefield electron acceleration in the blow-out regime and the associated betatron X-ray radiation were investigated experimentally as a function of the plasma density in a configuration where the laser is guided. Dielectric capillary tubes were employed to assist the laser keeping self-focused over a long distance by collecting the laser energy around its central focal spot. With a 40 fs, 16 TW pulsed laser, electron bunches with tens of pC charge were measured to be accelerated to an energy up to 300 MeV, accompanied by X-ray emission with a peak brightness of the order of 10 21 ph/s/mm(2)/mrad(2)/0.1%BW. Electron trapping and acceleration were studied using the emitted X-ray beam distribution to map the acceleration process; the number of betatron oscillations performed by the electrons was inferred from the correlation between measured X-ray fluence and beam charge. A study of the stability of electron and X-ray generation suggests that the fluctuation of X-ray emission can be reduced by stabilizing the beam charge. The experimental results are in good agreement with 3D particle-in-cell (PIC) simulation. (C) 2013 AIP Publishing LLC. (Less)
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organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physics of Plasmas
volume
20
issue
8
article number
083106
publisher
American Institute of Physics (AIP)
external identifiers
  • wos:000323946800082
ISSN
1070-664X
DOI
10.1063/1.4817747
language
English
LU publication?
yes
id
d91cd1b3-eabb-45b6-9474-536e19016f73 (old id 4062497)
date added to LUP
2016-04-01 09:51:15
date last changed
2025-04-04 14:17:32
@article{d91cd1b3-eabb-45b6-9474-536e19016f73,
  abstract     = {{Laser wakefield electron acceleration in the blow-out regime and the associated betatron X-ray radiation were investigated experimentally as a function of the plasma density in a configuration where the laser is guided. Dielectric capillary tubes were employed to assist the laser keeping self-focused over a long distance by collecting the laser energy around its central focal spot. With a 40 fs, 16 TW pulsed laser, electron bunches with tens of pC charge were measured to be accelerated to an energy up to 300 MeV, accompanied by X-ray emission with a peak brightness of the order of 10 21 ph/s/mm(2)/mrad(2)/0.1%BW. Electron trapping and acceleration were studied using the emitted X-ray beam distribution to map the acceleration process; the number of betatron oscillations performed by the electrons was inferred from the correlation between measured X-ray fluence and beam charge. A study of the stability of electron and X-ray generation suggests that the fluctuation of X-ray emission can be reduced by stabilizing the beam charge. The experimental results are in good agreement with 3D particle-in-cell (PIC) simulation. (C) 2013 AIP Publishing LLC.}},
  author       = {{Ju, J. and Svensson, Kristoffer and Ferrari, H. and Doepp, A. and Genoud, Guillaume and Wojda, Franck and Burza, Matthias and Persson, Anders and Lundh, Olle and Wahlström, Claes-Göran and Cros, B.}},
  issn         = {{1070-664X}},
  language     = {{eng}},
  number       = {{8}},
  publisher    = {{American Institute of Physics (AIP)}},
  series       = {{Physics of Plasmas}},
  title        = {{Study of electron acceleration and x-ray radiation as a function of plasma density in capillary-guided laser wakefield accelerators}},
  url          = {{https://lup.lub.lu.se/search/files/1318365/4117242.pdf}},
  doi          = {{10.1063/1.4817747}},
  volume       = {{20}},
  year         = {{2013}},
}