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Optica Publishing Group
  • Chinese Optics Letters
  • Vol. 10,
  • Issue 6,
  • pp. 063501-
  • (2012)

Laser wakefield electron acceleration for γ-ray radiography application

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Abstract

An electron beam is obtained using laser wakefield electron accelerator, and converted into a γ-ray source after undergoing bremsstrahlung radiation in a dense material. A quasi-monoenergetic structure is observed when the length of the plasma channel was modified. The structure has a 58-MeV peak energy, 15-mrad (full-width at half-maximum) divergence angle, and 340-pC charge. The γ-ray source generated by this high-quality electron beam is brighter and has higher spatial and temporal resolutions than other conventional sources. A γ-ray radiography demonstrational experiment is performed. Pictures of a ball with different layers made of different materials are taken. The results show a clear structure and density resolution.

© 2012 Chinese Optics Letters

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