title: Measurement of Hydrodynamic Growth near Peak Velocity in an Inertial Confinement Fusion Capsule Implosion using a Self-Radiography Technique.
abstract: First measurements of hydrodynamic growth near peak implosion velocity in an inertial confinement fusion (ICF) implosion at the National Ignition Facility were obtained using a self-radiographing technique and a preimposed Legendre mode 40, λ=140  μm, sinusoidal perturbation. These are the first measurements of the total growth at the most unstable mode from acceleration Rayleigh-Taylor achieved in any ICF experiment to date, showing growth of the areal density perturbation of ∼7000×. Measurements were made at convergences of ∼5 to ∼10× at both the waist and pole of the capsule, demonstrating simultaneous measurements of the growth factors from both lines of sight. The areal density growth factors are an order of magnitude larger than prior experimental measurements and differed by ∼2× between the waist and the pole, showing asymmetry in the measured growth factors. These new measurements significantly advance our ability to diagnose perturbations detrimental to ICF implosions, uniquely intersecting the change from an accelerating to decelerating shell, with multiple simultaneous angular views.
authors.affiliation: Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA.
authors.forename: L A
authors.initials: LA
authors.lastname: Pickworth
authors.affiliation: Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA.
authors.forename: B A
authors.initials: BA
authors.lastname: Hammel
authors.affiliation: Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA.
authors.forename: V A
authors.initials: VA
authors.lastname: Smalyuk
authors.affiliation: Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA.
authors.forename: A G
authors.initials: AG
authors.lastname: MacPhee
authors.affiliation: Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA.
authors.forename: H A
authors.initials: HA
authors.lastname: Scott
authors.affiliation: Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA.
authors.forename: H F
authors.initials: HF
authors.lastname: Robey
authors.affiliation: Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA.
authors.forename: O L
authors.initials: OL
authors.lastname: Landen
authors.affiliation: Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA.
authors.forename: M A
authors.initials: MA
authors.lastname: Barrios
authors.affiliation: University of Rochester, Laboratory for Laser Energetics, Rochester, New York, USA.
authors.forename: S P
authors.initials: SP
authors.lastname: Regan
authors.affiliation: Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA.
authors.forename: M B
authors.initials: MB
authors.lastname: Schneider
authors.affiliation: General Atomics, San Diego, California, USA.
authors.forename: M
authors.initials: M
authors.lastname: Hoppe
authors.affiliation: Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA.
authors.forename: T
authors.initials: T
authors.lastname: Kohut
authors.affiliation: Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA.
authors.forename: D
authors.initials: D
authors.lastname: Holunga
authors.affiliation: Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA.
authors.forename: C
authors.initials: C
authors.lastname: Walters
authors.affiliation: Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA.
authors.forename: B
authors.initials: B
authors.lastname: Haid
authors.affiliation: Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA.
authors.forename: M
authors.initials: M
authors.lastname: Dayton