Stable and confined burn in a Revolver ignition capsule

Molvig, Kim; Schmitt, Mark J.; Betti, Riccardo; Campbell, E. Michael; McKenty, Patrick

doi:10.1063/1.5037224

Stable and confined burn in a Revolver ignition capsule

Journal Article · Wed Aug 15 00:00:00 EDT 2018 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.5037224· OSTI ID:1467340

Molvig, Kim ^[1]; ^[1]; Betti, Riccardo ^[1]; ^[1]; ^[1]

Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

In this paper, the main burn phase physics in a Revolver ignition capsule is analyzed and found to exhibit a new feature where pusher stagnation is persistent and burn occurs with the fuel at a fixed volume. The pressure and density gradients at the fuel-pusher interface are both positive making it stable to Rayleigh-Taylor growth. Expansion cooling and RT mixing are absent from the Revolver burn during this time. The effect is due to the massive heavy metal pusher shell being compressed during implosion and heated on an inner layer by the Marshak wave. The pusher is driven to a higher pressure than the DT fuel and becomes a fuel confining shell starting at stagnation and continuing past the time of peak burn. This period of persistent stagnation lasts for approximately 100 ps (in the baseline design) with a fuel burnup during stagnation of 40%. Finally, this behavior does not occur in any other capsule designs, including the double shell schemes that also employ a heavy metal pusher.

View Accepted Manuscript (DOE)

Research Organization:: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: USDOE; USDOE Laboratory Directed Research and Development (LDRD) Program

Grant/Contract Number:: AC52-06NA25396

OSTI ID:: 1467340

Alternate ID(s):: OSTI ID: 1464663

Report Number(s):: LA-UR-18-23353

Journal Information:: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 8 Vol. 25; ISSN 1070-664X

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited By (3)

First experiments on Revolver shell collisions at the OMEGA laser Scheiner, Brett; Schmitt, Mark J.; Hsu, Scott C. Physics of Plasmas, Vol. 26, Issue 7 https://doi.org/10.1063/1.5099975	journal	July 2019
Direct-drive double-shell implosion: A platform for burning-plasma physics studies Hu, S. X.; Epstein, R.; Theobald, W. Physical Review E, Vol. 100, Issue 6 https://doi.org/10.1103/physreve.100.063204	journal	December 2019
First experiments on Revolver shell collisions at the OMEGA Laser Scheiner, Brett; Schmitt, Mark J.; Hsu, Scott C. arXiv https://doi.org/10.48550/arxiv.1904.07086	text	January 2019

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