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Proceedings Paper

Ablation of nonlinear-force driven plasma blocks for fast igniter application
Author(s): G. H. Miley; J. Badziak; S. Glowacz; S. Jablonski; J. Wolowski; H. Hora; P. X. Hammerling; F. Osman; Y. Cang; X. He; H. Peng; J. Zhang; K. Jungwirth; K. Rohlena; J. Ullschmied
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Paper Abstract

Interaction of TW-ps laser with plasma results in a skin layer mechanism for nonlinear (ponderomotive) force driven two dimensional plasma blocks (pistons) if a very high contrast ratio is provided for suppression of relativistic self-focusing. This Skin layer acceleration (SLA) [1] results in space charge neutral plasma blocks with ion current densities larger than 1010 Amp/cm2 [1-3]. Using Ions in the MeV range results in 1000 times higher proton or DT current densities [3] than the proton fast igniter [4] is using and may result in better conditions of this fast ignitor scheme. Using ballistic focusing of the generated plasma blocks and a short time thermal expansion of these blocks for increasing their thickness while keeping the high ion current densities, results in conditions favourable for this option of fast ignition of a fusion target. Some details of the interaction processes are still to be analysed but the solutions studies to date are most encouraging.

Paper Details

Date Published: 7 June 2006
PDF: 12 pages
Proc. SPIE 6261, High-Power Laser Ablation VI, 626129 (7 June 2006); doi: 10.1117/12.671491
Show Author Affiliations
G. H. Miley, Univ. of Illinois at Urbana-Champaign (United States)
J. Badziak, Institute of Plasma Physics and Laser Microfusion (Poland)
S. Glowacz, Institute of Plasma Physics and Laser Microfusion (Poland)
S. Jablonski, Institute of Plasma Physics and Laser Microfusion (Poland)
J. Wolowski, Institute of Plasma Physics and Laser Microfusion (Poland)
H. Hora, Univ. New South Wales (Australia)
P. X. Hammerling, Quantum Resonance Inc. (United States)
F. Osman, Univ. of Western Sydney (Australia)
Y. Cang, Univ. of Western Sydney (Australia)
Institute of Physics (China)
X. He, Institute of Applied Physics and Computational Mathematics (China)
H. Peng, China Academy of Engineering Physics (China)
J. Zhang, Institute of Physics (China)
K. Jungwirth, Institute of Physics (Czech Republic)
K. Rohlena, Institute of Physics (Czech Republic)
J. Ullschmied, Institute of Physics (Czech Republic)

Published in SPIE Proceedings Vol. 6261:
High-Power Laser Ablation VI
Claude R. Phipps, Editor(s)

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