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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 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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publication status
published
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in
Physics of Plasmas
volume
20
issue
8
publisher
American Institute of Physics
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
2013-10-22 14:56:15
date last changed
2018-11-21 19:37:35
@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.},
  articleno    = {083106},
  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},
  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          = {http://dx.doi.org/10.1063/1.4817747},
  volume       = {20},
  year         = {2013},
}