Tree code simulations of proton acceleration from laser-irradiated wire targets

Gibbon, P.; Clark, E. L.; Zepf, M.; Beg, F. N.; Wei, M. S.; Evans, R. G.

doi:10.1063/1.1767096

Journal Article

PreJuSER-41941

Tree code simulations of proton acceleration from laser-irradiated wire targets

Gibbon, P.FZJ* ; Beg, F. N. ; Wei, M. S. ; Clark, E. L. ; Evans, R. G. ; Zepf, M.

2004
American Institute of Physics [S.l.]

Physics of plasmas 11, 4032 - 4040 (2004) [10.1063/1.1767096]

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Please use a persistent id in citations: http://hdl.handle.net/2128/2223 doi:10.1063/1.1767096

Abstract: Recent experiments using Terawatt lasers to accelerate protons deposited on thin wire targets are modeled with a new type of gridless plasma simulation code. In contrast to conventional mesh-based methods, this technique offers a unique capability in emulating the complex geometry and open-ended boundary conditions characteristic of contemporary experimental conditions. Comparisons of ion acceleration are made between the tree code and standard particle-in-cell simulations for a typical collisionless "hole boring" scenario in slab geometry. The utility of the gridless approach is emphasized by a series of simulations in "wire" geometry, in which electrons are permitted to circulate around the target at arbitrary distances from the focal region. The simulations reveal a number of features in common with recent experimental observations, including a disclike emission pattern of the MeV protons accelerated away from the wire. (C) 2004 American Institute of Physics.

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