title: Dependence of shell mix on feedthrough in direct drive inertial confinement fusion.
abstract: The mixing of cold, high-density shell plasma with the low-density, hot spot plasma by the Rayleigh-Taylor instability in inertial confinement fusion is experimentally shown to correlate with the calculated perturbation feedthrough from the ablation surface to the inner shell surface. A fourfold decrease in the density of shell material in the mix region of direct drive implosions of gas filled spherical plastic shells having predicted convergence ratios approximately 15 was observed when laser imprint levels were reduced and the initial shell was thicker, corresponding to a reduction in the feedthrough rms level by a factor of 6. Shell mix is also shown to limit the spherical compression of the implosion.
authors.affiliation: Laboratory for Laser Energetics, University of Rochester, 250 East River Road, Rochester, NY 14623-1299, USA.
authors.forename: S P
authors.initials: SP
authors.lastname: Regan
authors.forename: J A
authors.initials: JA
authors.lastname: Delettrez
authors.forename: V N
authors.initials: VN
authors.lastname: Goncharov
authors.forename: F J
authors.initials: FJ
authors.lastname: Marshall
authors.forename: J M
authors.initials: JM
authors.lastname: Soures
authors.forename: V A
authors.initials: VA
authors.lastname: Smalyuk
authors.forename: P B
authors.initials: PB
authors.lastname: Radha
authors.forename: B
authors.initials: B
authors.lastname: Yaakobi
authors.forename: R
authors.initials: R
authors.lastname: Epstein
authors.forename: V Yu
authors.initials: VY
authors.lastname: Glebov
authors.forename: P A
authors.initials: PA
authors.lastname: Jaanimagi
authors.forename: D D
authors.initials: DD
authors.lastname: Meyerhofer
authors.forename: T C
authors.initials: TC
authors.lastname: Sangster
authors.forename: W
authors.initials: W
authors.lastname: Seka
authors.forename: S
authors.initials: S
authors.lastname: Skupsky
authors.forename: C
authors.initials: C
authors.lastname: Stoeckl
authors.forename: D A
authors.initials: DA
authors.lastname: Haynes
authors.forename: J A
authors.initials: JA
authors.lastname: Frenje
authors.forename: C K
authors.initials: CK
authors.lastname: Li
authors.forename: R D
authors.initials: RD
authors.lastname: Petrasso
authors.forename: F H
authors.initials: FH
authors.lastname: Séguin