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Analysis of x-ray emission and electron dynamics in a capillary-guided laser wakefield accelerator

Ju, J.; Genoud, Guillaume LU ; Ferrari, H. E.; Dadoun, O.; Paradkar, B.; Svensson, Kristoffer LU ; Wojda, Franck LU ; Burza, Matthias LU ; Persson, Anders LU and Lundh, Olle LU , et al. (2014) In Physical Review Special Topics. Accelerators and Beams 17(5).
Abstract

The dynamics of electron acceleration driven by laser wakefield inside a 30.5 mm long dielectric capillary tube is analyzed using radiation emitted in the x-ray range. 3D particle-in-cell simulations, performed with parameters close to the experimental ones, show that in long plasmas, the accelerated electrons catch up and finally overrun the driving laser owing to a higher velocity of the electrons in the plasma. The electrons are then transversely scattered by the laser pulse, and penetrate the capillary wall where they generate bremsstrahlung radiation, modeled using geant4 simulations. The signature of bremsstrahlung radiation is detected using an x-ray camera, together with the betatron radiation emitted during electron... (More)

The dynamics of electron acceleration driven by laser wakefield inside a 30.5 mm long dielectric capillary tube is analyzed using radiation emitted in the x-ray range. 3D particle-in-cell simulations, performed with parameters close to the experimental ones, show that in long plasmas, the accelerated electrons catch up and finally overrun the driving laser owing to a higher velocity of the electrons in the plasma. The electrons are then transversely scattered by the laser pulse, and penetrate the capillary wall where they generate bremsstrahlung radiation, modeled using geant4 simulations. The signature of bremsstrahlung radiation is detected using an x-ray camera, together with the betatron radiation emitted during electron acceleration in the plasma bubble. The reflection of betatron radiation from the inner capillary surface also accounts for a fraction of the observed signal on the x-ray camera. The simulation results are in agreement with the experimental ones and provide a detailed description of the electron and radiation properties, useful for the design of laser wakefield accelerators or radiation sources using long plasma media. © Published by the American Physical Society.

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published
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Physical Review Special Topics. Accelerators and Beams
volume
17
issue
5
publisher
American Physical Society
external identifiers
  • Scopus:84902095804
ISSN
1098-4402
DOI
10.1103/PhysRevSTAB.17.051302
language
English
LU publication?
yes
id
d251cea5-2789-49f8-8f9b-d2980abd80f5
date added to LUP
2016-04-12 13:36:50
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2016-07-27 13:37:25
@misc{d251cea5-2789-49f8-8f9b-d2980abd80f5,
  abstract     = {<p>The dynamics of electron acceleration driven by laser wakefield inside a 30.5 mm long dielectric capillary tube is analyzed using radiation emitted in the x-ray range. 3D particle-in-cell simulations, performed with parameters close to the experimental ones, show that in long plasmas, the accelerated electrons catch up and finally overrun the driving laser owing to a higher velocity of the electrons in the plasma. The electrons are then transversely scattered by the laser pulse, and penetrate the capillary wall where they generate bremsstrahlung radiation, modeled using geant4 simulations. The signature of bremsstrahlung radiation is detected using an x-ray camera, together with the betatron radiation emitted during electron acceleration in the plasma bubble. The reflection of betatron radiation from the inner capillary surface also accounts for a fraction of the observed signal on the x-ray camera. The simulation results are in agreement with the experimental ones and provide a detailed description of the electron and radiation properties, useful for the design of laser wakefield accelerators or radiation sources using long plasma media. © Published by the American Physical Society.</p>},
  author       = {Ju, J. and Genoud, Guillaume and Ferrari, H. E. and Dadoun, O. and Paradkar, B. and Svensson, Kristoffer and Wojda, Franck and Burza, Matthias and Persson, Anders and Lundh, Olle and Andreev, N. E. and Wahlström, Claes-Göran and Cros, B.},
  issn         = {1098-4402},
  language     = {eng},
  month        = {05},
  number       = {5},
  publisher    = {ARRAY(0x8638018)},
  series       = {Physical Review Special Topics. Accelerators and Beams},
  title        = {Analysis of x-ray emission and electron dynamics in a capillary-guided laser wakefield accelerator},
  url          = {http://dx.doi.org/10.1103/PhysRevSTAB.17.051302},
  volume       = {17},
  year         = {2014},
}