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Proceedings Paper

Conditions for initiation of effective thermonuclear burning of laser targets
Author(s): Aleksey A. Levkovskii; Alexander A. Andreev; Dmitrij V. Il'in; Vladimir E. Sherman; Vladislav B. Rozanov; Sergei Yu. Gus'kov
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Paper Abstract

The results of Monte-Carlo modeling of volume and spark ignition of spherical laser targets are systematized and the critical parameters are obtained both of isobaric and of isochoric central ignitors. It is shown that the target thermonuclear (TN) burning is independent on ignitor present if the ignitor dimension and temperature lower than the critical ones. In the opposite case TN flash result in effective burning with gain G-100, and the TN energy release is practically independent on the further increase of ignitor parameters. The intermediate gains 1 < G < 100 are obtained in rather narrow range of ignitor parameters near the critical. It is shown that the values of critical ignitor parameters are very sensitive to the way of ignition. The critical dimensions of isobaric ignitors are greater by several fold than ones of isochoric ignitors. On the contrary the overcritical target gain is practically independent on ignition origin and may be evaluated with a good accuracy by the simple asymptotic expression. The isochoric spark ignition associated with the fast ignition scheme is considered in detail and evaluations of minimum energy absorbed by extra laser pulse in terms of energy absorbed by basic driver are presented.

Paper Details

Date Published: 11 January 2000
PDF: 9 pages
Proc. SPIE 3886, High-Power Lasers in Energy Engineering, (11 January 2000); doi: 10.1117/12.375138
Show Author Affiliations
Aleksey A. Levkovskii, St. Petersburg Institute of Machine Building (Russia)
Alexander A. Andreev, S.I. Vavilov State Optical Institute (Japan)
Dmitrij V. Il'in, St. Petersburg Institute of Machine Building (Russia)
Vladimir E. Sherman, St. Petersburg Institute of Machine Building (Russia)
Vladislav B. Rozanov, P.N. Lebedev Physical Institute (Russia)
Sergei Yu. Gus'kov, P.N. Lebedev Physical Institute (Russia)

Published in SPIE Proceedings Vol. 3886:
High-Power Lasers in Energy Engineering
Kunioki Mima; Gerald L. Kulcinski; William J. Hogan, Editor(s)

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