Laser driven acceleration of electrons and ions

Details Laser driven acceleration of electrons and ions Laser driven acceleration of electrons and ions

Apr 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aps..apr.e6005l&link_type=abstract

American Physical Society, April Meeting, Jointly Sponsored with the High Energy Astrophysics Division (HEAD) of the American As

Astronomy and Astrophysics

Astrophysics

Scientific paper

Focusing ultra-short pulse high peak power, high intensity laser beams onto gaseous or solid targets has been shown to result in the emission of energetic particles. In the case of gas targets, the intense laser ionizes the gas and, through its ponderomotive or photon pressure, can excite large amplitude plasma waves. The longitudinal electric field associated with these coherent plasma waves can be on the order of 10’s to 100’s of GV/m and typically has a phase velocity close to the speed of light. Under suitable conditions, background or externally injected electrons can be trapped and accelerated in these waves to multi-MeV energies, offering the possibility to develop compact GeV-class accelerators. In the case of solid targets, ion acceleration using short pulse lasers has recently been demonstrated from both the front and rear surface of the targets. Whereas front-surface accelerated ion beams have relatively low energy (few MeV) with poor transverse quality, ion beams emitted from the rear surface can have energies in the 10’s of MeV and excellent transverse properties. The acceleration mechanisms and challenges will be discussed for these different cases. Applications for laser driven electron and ion accelerators will be presented.

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