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Proceedings Paper

New skin depth plasma interaction by ps-TW laser pulses and consequences for fusion energy
Author(s): Heinrich Hora; Hansheng Peng; Weiyan Zhang; Frederick Osman
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Paper Abstract

A new type of MeV ion generation at laser-plasma interaction has been measured based on the observation [1] that ps neodymium glass laser pulses of about TW and higher power do not produce the relativistic self-focusing based very high ion energies but more than 50 times lower energies. On top the strange observation was reported [fl that the number of the emitted fast ions did not change at variation of the laser focus intensity by a factor 30. This can be explained by the effect that without an inadiating prepulse, a pui plane gcmetnc skin layer interaction mechathsm occurs [2]. Neither relativistic self-focusing is possible nor the process of thermalization of quiver energy by quantum modified collisions. Following our conclusions about the difficulties for the fast ignitor concept of laser fi.ision [3], we can explain how these mechanisms can be used for studying the self-sustained fusion combustion waves [4] as known from the spark ignition at laser fusion. We further expect an improvement of the conditions for the experiments [5]with the highest laser fusion gains ever reported where even no pre-compression of the ftision plasma was necessary.

Paper Details

Date Published: 5 September 2002
PDF: 12 pages
Proc. SPIE 4914, High-Power Lasers and Applications II, (5 September 2002); doi: 10.1117/12.481804
Show Author Affiliations
Heinrich Hora, Univ. of New South Wales (Australia)
Hansheng Peng, China Academy of Engineering Physics (China)
Weiyan Zhang, China Academy of Engineering Physics (China)
Frederick Osman, Univ. of Western Sydney (Australia)

Published in SPIE Proceedings Vol. 4914:
High-Power Lasers and Applications II
Dianyuan Fan; Keith A. Truesdell; Koji Yasui, Editor(s)

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