title: Late-Time Mixing Sensitivity to Initial Broadband Surface Roughness in High-Energy-Density Shear Layers.
abstract: Using a large volume high-energy-density fluid shear experiment (8.5  cm^{3}) at the National Ignition Facility, we have demonstrated for the first time the ability to significantly alter the evolution of a supersonic sheared mixing layer by controlling the initial conditions of that layer. By altering the initial surface roughness of the tracer foil, we demonstrate the ability to transition the shear mixing layer from a highly ordered system of coherent structures to a randomly ordered system with a faster growing mix layer, indicative of strong mixing in the layer at a temperature of several tens of electron volts and at near solid density. Simulations using a turbulent-mix model show good agreement with the experimental results and poor agreement without turbulent mix.
authors.affiliation: Physics Division, Plasma Physics, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
authors.forename: K A
authors.initials: KA
authors.lastname: Flippo
authors.affiliation: Theoretical Design Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
authors.forename: F W
authors.initials: FW
authors.lastname: Doss
authors.affiliation: Physics Division, Plasma Physics, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
authors.forename: J L
authors.initials: JL
authors.lastname: Kline
authors.affiliation: Physics Division, Plasma Physics, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
authors.forename: E C
authors.initials: EC
authors.lastname: Merritt
authors.affiliation: Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
authors.forename: D
authors.initials: D
authors.lastname: Capelli
authors.affiliation: Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
authors.forename: T
authors.initials: T
authors.lastname: Cardenas
authors.affiliation: Computational Physics Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
authors.forename: B
authors.initials: B
authors.lastname: DeVolder
authors.affiliation: Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
authors.forename: F
authors.initials: F
authors.lastname: Fierro
authors.affiliation: Lawrence Livermore National Laboratory, Livermore, California 94550-9234, USA.
authors.forename: C M
authors.initials: CM
authors.lastname: Huntington
authors.affiliation: Physics Division, Plasma Physics, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
authors.forename: L
authors.initials: L
authors.lastname: Kot
authors.affiliation: Physics Division, Plasma Physics, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
authors.forename: E N
authors.initials: EN
authors.lastname: Loomis
authors.affiliation: Lawrence Livermore National Laboratory, Livermore, California 94550-9234, USA.
authors.forename: S A
authors.initials: SA
authors.lastname: MacLaren
authors.affiliation: Physics Division, Plasma Physics, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
authors.forename: T J
authors.initials: TJ
authors.lastname: Murphy
authors.affiliation: Lawrence Livermore National Laboratory, Livermore, California 94550-9234, USA.
authors.forename: S R
authors.initials: SR
authors.lastname: Nagel
authors.affiliation: Physics Division, Plasma Physics, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
authors.forename: T S
authors.initials: TS
authors.lastname: Perry
authors.affiliation: Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
authors.forename: R B
authors.initials: RB
authors.lastname: Randolph
authors.affiliation: Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
authors.forename: G
authors.initials: G
authors.lastname: Rivera
authors.affiliation: Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
authors.forename: D W
authors.initials: DW
authors.lastname: Schmidt