Electron injection and trapping in a laser wakefield by field ionization to high-charge states of gases
Journal of Applied Physics, ISSN: 0021-8979, Vol: 99, Issue: 5
2006
- 150Citations
- 65Captures
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Article Description
A scheme for electron injection into a laser wakefield is presented, which makes use of two orthogonally directed laser pulses and a gaseous medium with a moderate or high atomic number such as neon. A pump laser pulse ionizes the medium to its midcharge states to form underdense plasma and meanwhile excites a high amplitude wakefield firstly. Another ultrashort laser pulse with higher intensity is then injected transversely, which further ionizes the medium to high-charge states to produce new free electrons with certain energy. Part of these new-born electrons can be trapped and accelerated by the laser wakefield to high energies. Numerical simulations using a particle-in-cell code with field ionization included are conducted to verify the scheme. © 2006 American Institute of Physics.
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