Effects of radiation on direct-drive laser fusion targets

Autor: J.L. Weaver, A. V. Deniz, M. Klapisch, Denis Colombant, C. J. Pawley, John H. Gardner, Andrew J. Schmitt, Stephen E. Bodner, Yefim Aglitskiy, Victor Serlin, S. P. Obenschain
Rok vydání: 2000
Předmět:
Zdroj: Physics of Plasmas. 7:2046-2054
ISSN: 1089-7674
1070-664X
DOI: 10.1063/1.874026
Popis: The role played by radiation in the radiation-preheated direct-drive laser fusion target design is discussed. The soft x-rays emitted during the foot of the laser pulse—at a few 1012 W/cm2—preheat the low-opacity foam ablator which helps to control the Rayleigh–Taylor instability. The foam opacity is, however, thick enough to stop that radiation, keeping the fuel on a low adiabat. Radiation effects are also important in the blow-off corona of the target because they establish a long scale-length plasma. This may help to shield the ablation region from the nonuniformities in the laser absorption.
Databáze: OpenAIRE