Laser acceleration of high-energy protons in variable density plasmas

Details Laser acceleration of high-energy protons in variable density plasmas Laser acceleration of high-energy protons in variable density plasmas

Feb 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009njph...11b3038a&link_type=abstract

New Journal of Physics, Volume 11, Issue 2, pp. 023038 (2009).

Physics

6

Scientific paper

The acceleration of protons, induced by electrons generated by a short-pulse laser, is experimentally investigated when varying the density of the plasma target the laser is interacting with. The experimental results are compared with particle-in-cell (PIC) simulations for which the target conditions are inferred from hydrodynamic simulations. High-energy protons are observed only for the two extreme configurations, namely solid-density foils and near-critical-density plasmas having large gradients. Cold solid foils, however, yield the highest energy protons and best proton beam profiles. As suggested by simulations, near-critical-density plasmas could be optimized to further increase the proton energy.

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