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Tomography of injection and acceleration of monoenergetic electrons in a laser-wakefield accelerator
C-T Hsieh1, C-M Huang, C-L Chang
1Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei 106, Taiwan.
Abstract:
A tomographic diagnosis method was developed to systematically resolve the injection and acceleration processes of a monoenergetic electron beam in a laser-wakefield accelerator. It was found that all the monoenergetic electrons are injected at the same location in the plasma column and accelerated from 5 to 55 MeV energy in 200 microm distance. This is a direct measurement of the real acceleration gradient in a laser-wakefield accelerator, and the experimental data are consistent with the model of transverse wave breaking and beam loading for monoenergetic electron injection.
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