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New target designs for direct-drive ICF

  • LEE PHILLIPS (a1), JOHN H. GARDNER (a1), STEPHEN E. BODNER (a2), DENIS COLOMBANT (a2), S.P. OBENSCHAIN (a2), A.J. SCHMITT (a2), JILL P. DAHLBURG (a2), TOM LEHECKA (a3), MARCEL KLAPISCH (a4) and AVRAHAM BAR-SHALOM (a3)...

Abstract

We describe two approaches to the design of a direct-drive high-gain pellet for inertial confinement fusion reactors that has enhanced stability due to the reduction in the Rayleigh-Taylor growth rate and enhanced thermal smoothing of laser imprint. The first design incorporates an overcoat containing a high-Z element that radiatively heats the ablator during the foot of the laser pulse. The second incorporates a very low density foam ablator that is compressed by a series of transmitted and reflected shocks. Both designs enhance thermal smoothing by developing a very long density scale length and high electron densities in the ablator blowoff.

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New target designs for direct-drive ICF

  • LEE PHILLIPS (a1), JOHN H. GARDNER (a1), STEPHEN E. BODNER (a2), DENIS COLOMBANT (a2), S.P. OBENSCHAIN (a2), A.J. SCHMITT (a2), JILL P. DAHLBURG (a2), TOM LEHECKA (a3), MARCEL KLAPISCH (a4) and AVRAHAM BAR-SHALOM (a3)...

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