Details

Autor(en) / Beteiligte

• Bellei, C.
• Foord, M. E.
• Bartal, T.
• Key, M. H.
• McLean, H. S.
• Patel, P. K.
• Stephens, R. B.
• Beg, F. N.

Titel

Electron and ion dynamics during the expansion of a laser-heated plasma under vacuum

Ist Teil von

• Physics of plasmas, 2012-03, Vol.19 (3), p.033109-033109-9

Ort / Verlag

American Institute of Physics

Erscheinungsjahr

2012

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• The trajectories of electrons and ions when a hot plasma expands under vacuum are studied in detail from a theoretical point of view and with the aid of numerical simulations. Exact analytic solutions are obtained in multi-dimensions, starting from the solution for the expansion of a quasi-neutral, Gaussian, collisionless plasma in vacuum [D. S. Dorozhkina and V. E. Semenov, Phys. Rev. Lett. 81, 2691 (1998)]. Focusing of laser-accelerated ions with concave targets is investigated with the hybrid particle-in-cell code Lsp. For a given laser energy and pulse duration, a larger laser focal spot is found to be beneficial to focus the ion beam to a smaller focal spot, due both to a geometric effect and to the decrease in the transverse gradient of the hot electron pressure.