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Title: Stable and confined burn in a Revolver ignition capsule

Abstract

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.

Authors:
 [1]; ORCiD logo [1];  [1]; ORCiD logo [1]; ORCiD logo [1]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE; LANL Laboratory Directed Research and Development (LDRD) Program
OSTI Identifier:
1467340
Alternate Identifier(s):
OSTI ID: 1464663
Report Number(s):
LA-UR-18-23353
Journal ID: ISSN 1070-664X
Grant/Contract Number:  
AC52-06NA25396; XWPL
Resource Type:
Accepted Manuscript
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 25; Journal Issue: 8; Journal ID: ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; rheology and fluid dynamics; flow instabilities

Citation Formats

Molvig, Kim, Schmitt, Mark J., Betti, Riccardo, Campbell, E. Michael, and McKenty, Patrick. Stable and confined burn in a Revolver ignition capsule. United States: N. p., 2018. Web. doi:10.1063/1.5037224.
Molvig, Kim, Schmitt, Mark J., Betti, Riccardo, Campbell, E. Michael, & McKenty, Patrick. Stable and confined burn in a Revolver ignition capsule. United States. doi:10.1063/1.5037224.
Molvig, Kim, Schmitt, Mark J., Betti, Riccardo, Campbell, E. Michael, and McKenty, Patrick. Wed . "Stable and confined burn in a Revolver ignition capsule". United States. doi:10.1063/1.5037224. https://www.osti.gov/servlets/purl/1467340.
@article{osti_1467340,
title = {Stable and confined burn in a Revolver ignition capsule},
author = {Molvig, Kim and Schmitt, Mark J. and Betti, Riccardo and Campbell, E. Michael and McKenty, Patrick},
abstractNote = {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.},
doi = {10.1063/1.5037224},
journal = {Physics of Plasmas},
number = 8,
volume = 25,
place = {United States},
year = {2018},
month = {8}
}

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Works referenced in this record:

Laser Compression of Matter to Super-High Densities: Thermonuclear (CTR) Applications
journal, September 1972

  • Nuckolls, John; Wood, Lowell; Thiessen, Albert
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