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Proceedings Paper

Laser application for fusion using volume ignition and smoothing by suppression of pulsation
Author(s): Heinrich Hora; M. Aydin; G. Kasotakis; R. L. Stening
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Paper Abstract

Laser fusion has achieved the level today that the physical mechanisms for an economic production (at the costs of light water reactors) of energy has been confirmed, based on underground tests using 10 MJ laser pulses. This scheme is based on conversion of the laser radiation into x rays for smoothing, called hohlraum or indirect drive, and on central spark ignition. The authors present an improvement of this scheme by the following two advancements: (a) More efficient direct drive. The long misunderstood 10 psec pulsating laser- plasma interaction, which cannot be dominated by stimulated Raman nor Brillouin scattering as confirmed experimentally by P.R. Drake and C. Labaune et at., is now understood from a very detailed computation showing how the laser radiation causes partial standing waves in the corona and spatial density ripple, followed by reflection far out at very low density (as measured by Maddever and Luther-Davies), with subsequent hydrodynamic decay of the ripples, repeated penetration of the light through the corona, standing ware generation etc., within 10 to 20 psec. (b) Use of volume ignition of ICF pellets. The mechanisms of self heat by charged fusion reaction products permit a very transparent computation of optimized fusion gains where the strongly lowered initial temperatures and the strong heating of the pellets after volume ignition result in fusion gains beyond 1000 for the not too high compression of DT.

Paper Details

Date Published: 1 October 1991
PDF: 12 pages
Proc. SPIE 1502, Industrial and Scientific Uses of High-Power Lasers, (1 October 1991); doi: 10.1117/12.46900
Show Author Affiliations
Heinrich Hora, Univ. of New South Wales (Australia)
M. Aydin, Univ. of New South Wales (Australia)
G. Kasotakis, Univ. of New South Wales (Australia)
R. L. Stening, Univ. of New South Wales (Australia)

Published in SPIE Proceedings Vol. 1502:
Industrial and Scientific Uses of High-Power Lasers
Jean Pierre Billon; Edouard Fabre, Editor(s)

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