Journal of the Optical Society of Korea

  • 제13권1호
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  • Pages.8-14
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  • 2009
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  • 1226-4776(pISSN)
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  • 2093-6885(eISSN)
한국광학회 (Optical Society of Korea)
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Laser Acceleration of Electron Beams to the GeV-class Energies in Gas Jets

  • Hafz, Nasr A.M. (Center for Femto-Atto Science and Technology (c-FAST), Advanced Photonics Research Institute Gwangju Institute of Science and Technology) ;
  • Jeong, Tae-Moon (Center for Femto-Atto Science and Technology (c-FAST), Advanced Photonics Research Institute Gwangju Institute of Science and Technology) ;
  • Lee, Seong-Ku (Center for Femto-Atto Science and Technology (c-FAST), Advanced Photonics Research Institute Gwangju Institute of Science and Technology) ;
  • Choi, Il-Woo (Center for Femto-Atto Science and Technology (c-FAST), Advanced Photonics Research Institute Gwangju Institute of Science and Technology) ;
  • Pae, Ki-Hong (Center for Femto-Atto Science and Technology (c-FAST), Advanced Photonics Research Institute Gwangju Institute of Science and Technology) ;
  • Kulagin, Victor V. (Sternberg Astronomical Institute, Moscow State University) ;
  • Sung, Jae-Hee (Center for Femto-Atto Science and Technology (c-FAST), Advanced Photonics Research Institute Gwangju Institute of Science and Technology) ;
  • Yu, Tae-Jun (Center for Femto-Atto Science and Technology (c-FAST), Advanced Photonics Research Institute Gwangju Institute of Science and Technology) ;
  • Cary, John R. (Department of Physics, University of Colorado) ;
  • Ko, Do-Kyeong (School of Photon Science and Technology and Advanced Photonics Research Institute Gwangju Institute of Science and Technology) ;
  • Lee, Jong-Min (Center for Femto-Atto Science and Technology (c-FAST), Advanced Photonics Research Institute Gwangju Institute of Science and Technology)
  • 투고 : 2009.12.16
  • 심사 : 2009.01.08
  • 발행 : 2009.03.25
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초록

In a laser-plasma wakefield accelerator, the ponderomotive force of an ultrashort high intensity laser pulse excites a longitudinal wave or plasma bubble in a way similar to the excitation of a wake wave behind a boat as it propagates on the water surface. Electric fields inside the plasma bubble can be several orders of magnitude higher than those available in conventional RF-based particle accelerator facilities which are limited by material breakdown. Therefore, if an electron bunch is properly phase-locked with the bubble's acceleration field, it can gain relativistic energies within an extremely short distance. Here, in the bubble regime we show the generation of stable and reproducible sub GeV, and GeV-class electron beams. Supported by three-dimensional particle-in-cell simulations, our experimental results show the highest acceleration gradients produced so far. Simulations suggested that the plasma bubble elongation should be minimized in order to achieve higher electron beam energies.

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