Diagnosis of pusher-fuel mixing for high growth-factor implosions (abstract)

Journal Article · Sun Jan 01 04:00:00 EST 1995 · Review of Scientific Instruments; (United States)

DOI:https://doi.org/10.1063/1.1146480· OSTI ID:6690655

Landen, O L; Hammel, B A; Keane, C J; Murphy, T J; Hay, R G; Lerche, R A; Nelson, M B; Cable, M D; Kilkenny, J D; Dittrich, T R; Levedahl, W K; Suter, L; Haan, S W; Hatchett, S P; McEachern, R; Cook, R; Wallace, R J ^[1]

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1. Lawrence Livermore National Laboratory, Livermore, California 94550 (United States)

The degradation in implosion performance of surface-pitted, indirectly driven Br-doped capsules which have been intentionally designed to be susceptible to large hydrodynamic instability growth has been systematically and reproducibly measured by a wide array of x-ray and neutron diagnostics. Primary and secondary neutron yields, and x-ray line ratios and durations from Ar and Ti fuel and pusher dopants are presented, showing clear sensitivity to increasing surface roughness and by inference, increasing pusher-fuel mix. The sensitivity of core x-ray emissivity and neutron bang-times to micron variations in capsule ablator thickness is also demonstrated. The experimental trends are compared to expectations based on two different models for the effects of instability growth at the pusher-fuel interface (atomic mixing versus Rayleigh--Taylor bubble-and-spike growth).

• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 6690655
• Journal Information: Review of Scientific Instruments; (United States), Journal Name: Review of Scientific Instruments; (United States) Vol. 66:1; ISSN 0034-6748; ISSN RSINAK
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700320* -- Plasma Diagnostic Techniques & Instrumentation-- (1992-)
ARGON
BARYONS
BROMINE ADDITIONS
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
ELEMENTS
FERMIONS
FLUIDS
FUELS
GASES
HADRONS
IMPLOSIONS
INTERFACES
IONIZING RADIATIONS
LASER IMPLOSIONS
METALS
NEUTRONS
NONMETALS
NUCLEONS
PLASMA DIAGNOSTICS
RADIATIONS
RARE GASES
THERMONUCLEAR FUELS
TITANIUM
TRANSITION ELEMENTS
X RADIATION