Three-dimensional reconstruction of implosion stagnation in laser direct drive on OMEGA

IF 1.6 3区物理与天体物理 Q3 PHYSICS, FLUIDS & PLASMAS

High Energy Density Physics Pub Date : 2024-05-23 DOI:10.1016/j.hedp.2024.101108

K. Churnetski , K.M. Woo , W. Theobald , C. Stoeckl , L. Ceurvorst , V. Gopalaswamy , H.G. Rinderknecht , P.V. Heuer , J.P. Knauer , C.J. Forrest , I.V. Igumenshchev , S.T. Ivancic , M. Michalko , R.C. Shah , A. Lees , P.B. Radha , R. Betti , C.A. Thomas , S.P. Regan , J. Kunimune , J.A. Frenje

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引用次数: 0

Abstract

Multidimensional effects on hot-spot formation must be considered to better understand the current limits on the performance of direct-drive inertial confinement fusion experiments on OMEGA with cryogenically layered solid deuterium–tritium targets. A comprehensive reconstruction effort has been established at the Laboratory for Laser Energetics to infer hot-spot and shell conditions at stagnation from a large collection of x-ray, neutron, and particle detectors along multiple lines of sight. Several time-gated and time-integrated x-ray imagers are being used to record the shape of the hot-spot plasma. A 3D hot-spot x-ray emission tomography technique has been developed to infer low-mode drive asymmetries from the hot-spot shape. A suite of neutron diagnostics is used to provide measurements of hot-spot flow velocity, ion temperature, and areal density. The information obtained from the x-ray and neutron detectors will be combined into a coherent model of the shape of the hot spot and shell assembly.

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欧米茄激光直接驱动中内爆停滞的三维重建

要更好地理解目前在欧米茄上进行的直接驱动惯性约束聚变实验对低温分层固体氘氚目标性能的限制，就必须考虑到对热点形成的多维影响。激光能量实验室（Laboratory for Laser Energetics）开展了一项全面的重建工作，通过沿多条视线的大量X射线、中子和粒子探测器来推断停滞时的热点和壳条件。多个时间门控和时间积分 X 射线成像仪被用来记录热点等离子体的形状。已开发出一种三维热点 X 射线发射断层扫描技术，用于从热点形状推断低模驱动不对称情况。中子诊断套件用于测量热点流速、离子温度和平均密度。从 X 射线和中子探测器获得的信息将结合到热点形状和外壳组件的连贯模型中。

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来源期刊

High Energy Density Physics PHYSICS, FLUIDS & PLASMAS-

CiteScore

4.20

自引率

6.20%

发文量

审稿时长

6-12 weeks

期刊介绍： High Energy Density Physics is an international journal covering original experimental and related theoretical work studying the physics of matter and radiation under extreme conditions. ''High energy density'' is understood to be an energy density exceeding about 1011 J/m3. The editors and the publisher are committed to provide this fast-growing community with a dedicated high quality channel to distribute their original findings. Papers suitable for publication in this journal cover topics in both the warm and hot dense matter regimes, such as laboratory studies relevant to non-LTE kinetics at extreme conditions, planetary interiors, astrophysical phenomena, inertial fusion and includes studies of, for example, material properties and both stable and unstable hydrodynamics. Developments in associated theoretical areas, for example the modelling of strongly coupled, partially degenerate and relativistic plasmas, are also covered.