title: Reduced instability growth with high-adiabat high-foot implosions at the National Ignition Facility.
abstract: Hydrodynamic instabilities are a major obstacle in the quest to achieve ignition as they cause preexisting capsule defects to grow and ultimately quench the fusion burn in experiments at the National Ignition Facility. Unstable growth at the ablation front has been dramatically reduced in implosions with "high-foot" drives as measured using x-ray radiography of modulations at the most dangerous wavelengths (Legendre mode numbers of 30-90). These growth reductions have helped to improve the performance of layered DT implosions reported by O. A. Hurricane et al. [Nature (London) 506, 343 (2014)], when compared to previous "low-foot" experiments, demonstrating the value of stabilizing ablation-front growth and providing directions for future ignition designs.
authors.affiliation: Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
authors.forename: D T
authors.initials: DT
authors.lastname: Casey
authors.affiliation: Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
authors.forename: V A
authors.initials: VA
authors.lastname: Smalyuk
authors.affiliation: Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
authors.forename: K S
authors.initials: KS
authors.lastname: Raman
authors.affiliation: Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
authors.forename: J L
authors.initials: JL
authors.lastname: Peterson
authors.affiliation: Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
authors.forename: L
authors.initials: L
authors.lastname: Berzak Hopkins
authors.affiliation: Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
authors.forename: D A
authors.initials: DA
authors.lastname: Callahan
authors.affiliation: Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
authors.forename: D S
authors.initials: DS
authors.lastname: Clark
authors.affiliation: Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
authors.forename: E L
authors.initials: EL
authors.lastname: Dewald
authors.affiliation: Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
authors.forename: T R
authors.initials: TR
authors.lastname: Dittrich
authors.affiliation: Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
authors.forename: S W
authors.initials: SW
authors.lastname: Haan
authors.affiliation: Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
authors.forename: D E
authors.initials: DE
authors.lastname: Hinkel
authors.affiliation: General Atomics, San Diego, California 92121, USA.
authors.forename: D
authors.initials: D
authors.lastname: Hoover
authors.affiliation: Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
authors.forename: O A
authors.initials: OA
authors.lastname: Hurricane
authors.affiliation: Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
authors.forename: J J
authors.initials: JJ
authors.lastname: Kroll
authors.affiliation: Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
authors.forename: O L
authors.initials: OL
authors.lastname: Landen
authors.affiliation: AWE Aldermaston, Reading, Berkshire RG7 4PR, United Kingdom.
authors.forename: A S
authors.initials: AS
authors.lastname: Moore
authors.affiliation: General Atomics, San Diego, California 92121, USA.
authors.forename: A
authors.initials: A
authors.lastname: Nikroo
authors.affiliation: Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
authors.forename: H-S
authors.initials: HS
authors.lastname: Park
authors.affiliation: Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
authors.forename: B A
authors.initials: BA
authors.lastname: Remington
authors.affiliation: Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
authors.forename: H F
authors.initials: HF
authors.lastname: Robey
authors.affiliation: Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
authors.forename: J R
authors.initials: JR
authors.lastname: Rygg
authors.affiliation: Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
authors.forename: J D
authors.initials: JD
authors.lastname: Salmonson
authors.affiliation: Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
authors.forename: R
authors.initials: R
authors.lastname: Tommasini
authors.affiliation: Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
authors.forename: K
authors.initials: K
authors.lastname: Widmann
mesh_terms: D003903:Deuterium / Q000737:chemistry*; D057446:Hydrodynamics; D008956:Models, Chemical; D009681:Nuclear Fusion; D014316:Tritium / Q000737:chemistry*
chemical_list: D014316:Tritium; D003903:Deuterium