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  • Received: Nov. 9, 2011

    Accepted: Jan. 10, 2012

    Posted: May. 17, 2012

    Published Online: May. 17, 2012

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    DOI: 10.3788/col201210.063501

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    Yuchi Wu, Zongqing Zhao, Bin Zhu, Kegong Dong, Xianlun Wen, Yingling He, Yuqiu Gu, Baohan Zhang. Laser wakefield electron acceleration for \gamma-ray radiography application[J]. Chinese Optics Letters, 2012, 10(6): 063501

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Chinese Optics Letters, Vol. 10, Issue 6, 063501 (2012)

Laser wakefield electron acceleration for \gamma-ray radiography application

Yuchi Wu, Zongqing Zhao, Bin Zhu, Kegong Dong, Xianlun Wen, Yingling He, Yuqiu Gu, and Baohan Zhang

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    Abstract

    An electron beam is obtained using laser wakefield electron accelerator, and converted into a \gamma-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 \gamma-ray source generated by this high-quality electron beam is brighter and has higher spatial and temporal resolutions than other conventional sources. A \gamma-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.

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