Tomography of the injection and acceleration processes that produce a monoenergetic electron beam in a laser wakefield accelerator
C.-T. Hsieh, C.-M. Huang, C.-L. Chang, Y.-C. Ho, Y.-S. Chen, J.-Y. Lin, J. Wang, and S.-Y. Chen
Physical Review Letters 96, 095001 (2006)
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 MeV to 55 MeV energy in 200-μm 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.
Institute of Atomic and Molecular Sciences Academia Sinica
