Výsledky vyhledávání

Time-dependent saturation and physics-based nonlinear model of cross-beam energy transfer

Autor: L. Yin, T. B. Nguyen, G. Chen, L. Chacon, D. J. Stark, L. Green, B. M. Haines

Publikováno v: Physics of Plasmas. 30

The nonlinear physics of cross-beam energy transfer (CBET) for multi-speckled laser beams is examined using large-scale particle-in-cell simulations for a range of laser and plasma conditions relevant to indirect-drive inertial confinement fusion (IC

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::aca7d92d9b9200d163ebf9cd261d0c42
https://doi.org/10.1063/5.0134867

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Nonlinear models for coupling the effects of stimulated Raman scattering to inertial confinement fusion codes

Autor: D. J. Stark, L. Yin, T. B. Nguyen, G. Chen, L. Chacon, B. M. Haines, L. Green

Publikováno v: Physics of Plasmas. 30

Laser plasma instabilities (LPI) reduce driver-target coupling, alter implosion symmetry, and therefore can fundamentally limit fusion performance in inertial confinement fusion (ICF). Developing a predictive modeling capability for LPI effects can c

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f6bc27795eab711ebe63c7e218341e2c
https://doi.org/10.1063/5.0134881

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Gravitomagnetic vorticity generation in black hole accretion discs: a potential spatial constraint on plasma flow stability

Autor: Chinmoy Bhattacharjee, D. J. Stark

Publikováno v: Monthly Notices of the Royal Astronomical Society. 508:414-420

We calculate the vorticity generation rate in the accretion disc near a slowly rotating black hole in the low-velocity, weak-field limit of general relativity. Specifically, we find that the frame-dragging effect due to the black hole’s rotation �

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a046100663b10f3301d71c8b62a97b20
https://doi.org/10.1093/mnras/stab2478

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Mechanisms of shape transfer and preheating in indirect-drive double shell collisions

Publikováno v: Physics of Plasmas. 29

Implosions of Hohlraum-driven double shell targets as an alternative inertial confinement fusion concept are underway at the National Ignition Facility. The double shell system relies on a series of energy transfer processes starting from thermal x-r

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::63a2eebaedde3e9a7b20dfd0d73488a0
https://doi.org/10.1063/5.0081346

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Progress on Machine Learning Informed Design Optimization for Double Shell Capsule Graded Density Inner Layer Targets

Autor: Eric Loomis, Michael Grosskopf, Wayne Scales, Nomita Vazirani, Paul A. Bradley, Brian Haines, Scott L. England, D. J. Stark

Publikováno v: 2021 IEEE International Conference on Plasma Science (ICOPS).

Advances in machine learning have the ability to cut down design costs and enhance the design process for high-energy-density experiments. Machine learning can use expensive simulation data to search the design space efficiently for an optimal design

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d32a6803348f47d579907ad7be6577c8
https://doi.org/10.1109/icops36761.2021.9588510

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Mitigating the Joint Feature in Double Shell Implosion Simulations

Autor: Irina Sagert, Lindsey Kuettner, T. E. Quintana, T. Morrow, Brian Haines, D. S. Montgomery, Brian M. Patterson, D. J. Stark, Lynne Goodwin, J. P. Sauppe, Steven H. Batha, Paul Keiter, Sasikumar Palaniyappan, Eric Loomis, R. F. Sacks

Publikováno v: 2021 IEEE International Conference on Plasma Science (ICOPS).

Double shell capsules are an attractive alternative in inertial confinement fusion experiments due to their potential for achieving a low-convergence, robust burn 1 . However, symmetry degradation and accompanying reduced fuel confinement plagues the

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a9c01798709e816d0bfead0412ae27ba
https://doi.org/10.1109/icops36761.2021.9588564

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The development of a high-resolution Eulerian radiation-hydrodynamics simulation capability for laser-driven Hohlraums

Publikováno v: Physics of Plasmas. 29:083901

Hohlraums are hollow cylindrical cavities with high-Z material walls used to convert laser energy into uniform x-ray radiation drives for inertial confinement fusion capsule implosions and high energy density physics experiments. Credible computation

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::51ce32b949181d13fd57651c9c049e90
https://doi.org/10.1063/5.0100985

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