C. A. Williams

Experimental Demonstration of Dynamical Similarity of the Preseeded Magneto-Rayleigh-Taylor Instability in Scaled Z-Pinch Implosions

D. E. Ruiz, David A. Yager-Elorriaga, Jeffrey Fein, J. Carpenter et autres

With the achievement of thermonuclear ignition, there is interest to increase the performance of inertial-confinement-fusion (ICF) systems to reach high fusion yields and high-energy gain for energy-production purposes. One approach to achieve this is magnetic-direct-drive (MDD) ICF, where magnetic fields are used …

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Analysis of streaked images of x-ray self-emission in laser-driven spherical implosions

Eric A. Smith, D. T. Bishel, D. A. Chin, Matthew Signor et autres

Imaging of x-ray self-emission provides a powerful in situ measurement of the spatial and temporal evolution of high-energy-density plasmas. However, interpretation of these measurements requires detailed understanding of the data-generating process. This work presents a case study in the interpretation of x-ray …

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Progress toward hydro-equivalent ignition in OMEGA direct-drive DT-layered implosions

L. Ceurvorst, R. Betti, V. Gopalaswamy, A. Lees et autres

Considerable progress has been made in deuterium-tritium-layered implosion experiments on the OMEGA Laser System, bringing the prospects for thermonuclear ignition in direct-drive configurations with megajoule-class lasers closer to reality. Doing so has required navigating the balance between improved 1D performance and multidimensional …

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Asymptotic scaling laws for the stagnation conditions of Z-pinch implosions

D. E. Ruiz, C. A. Williams, Roger Alan Vesey

Implosions of magnetically-driven annular shells (Z pinches) are studied in the laboratory to produce high-energy-density plasmas. Such plasmas have a wide-range of applications including x-ray generation, controlled thermonuclear fusion, and astrophysics studies. In this work, we theoretically investigate the in-flight dynamics of …

Asymptotic scaling laws for the stagnation conditions of Z-pinch implosions

D. E. Ruiz, C. A. Williams, Roger Alan Vesey

Implosions of magnetically driven annular shells (Z pinches) are studied in the laboratory to produce high-energy-density plasmas. Such plasmas have a wide-range of applications including x-ray generation, controlled thermonuclear fusion, and astrophysics studies. In this work, we theoretically investigate the in-flight dynamics …

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Applications of a Rayleigh-Taylor model to direct-drive laser fusion

C. A. Thomas, Michael J. Rosenberg, W. Theobald, James P. Knauer et autres

This paper presents a simple physics-based model for the interpretation of key metrics in laser direct drive. The only input parameters required are target scale, in-flight aspect ratio, and beam-to-target radius, and the importance of each has been quantified with a tailored …

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Publisher Correction: Demonstration of a hydrodynamically equivalent burning plasma in direct-drive inertial confinement fusion

V. Gopalaswamy, C. A. Williams, R. Betti, Daksha Patel et autres

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Demonstration of a hydrodynamically equivalent burning plasma in direct-drive inertial confinement fusion

V. Gopalaswamy, C. A. Williams, R. Betti, Daksha Patel et autres

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Demonstration of hot-spot fuel gain exceeding unity in direct-drive inertial confinement fusion implosions

C. A. Williams, R. Betti, V. Gopalaswamy, James P. Knauer et autres

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Diagnosing low-mode (ℓ < 6) and mid-mode (6 ≤ ℓ ≤ 60) asymmetries in the post-stagnation phase of laser-direct-drive deuterium–tritium cryogenic implosions on OMEGA

J. Baltazar, R. Betti, Kristen Churnetski, V. Gopalaswamy et autres

Low- and mid-mode perturbations are possible candidates for performance limitations in cryogenic direct-drive implosions on the OMEGA laser at the Laboratory of Laser Energetics. Simulations with a 3D hydrocode demonstrated that hotspot imagers do not show evidence of the shell breakup in …

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A knock-on deuteron imager for measurements of fuel and hotspot asymmetry in direct-drive inertial confinement fusion implosions (invited)

Hans G. Rinderknecht, P. V. Heuer, J. H. Kunimune, P. J. Adrian et autres

A knock-on deuteron imager (KoDI) has been implemented to measure the fuel and hotspot asymmetry of cryogenic inertial confinement fusion implosions on OMEGA. Energetic neutrons produced by D–T fusion elastically scatter (“knock on”) deuterons from the fuel layer with a probability that …

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High yields in direct-drive inertial confinement fusion using thin-ice DT liner targets

C. A. Williams, R. Betti, V. Gopalaswamy, A. Lees

We report simulation results that suggest record neutron yields above 3×1014 can be achieved in laser-driven fusion on OMEGA by imploding large-outer-diameter targets (∼1010 μm) containing ice layers as thin as 34 μm. Historically, the performance of thin and fast capsules is …

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