Shock formation in Ne, Ar, Kr, and Xe on deuterium gas puff implosions

Narkis, J.; Rahman, H. U.; Ney, P.; Desjarlais, M. P.; Wessel, F. J.; Conti, F.; Valenzuela, J. C.; Beg, F. N.

doi:10.1063/1.4972547

Shock formation in Ne, Ar, Kr, and Xe on deuterium gas puff implosions

Journal Article · Thu Dec 29 00:00:00 EST 2016 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4972547· OSTI ID:1340520

^[1]; Rahman, H. U. ^[2]; Ney, P. ^[2]; Desjarlais, M. P. ^[3]; Wessel, F. J. ^[2]; Conti, F. ^[2]; ^[1]; Beg, F. N. ^[1]

Univ. of California, San Diego, La Jolla, CA (United States)
Magneto-Inertial Fusion Technologies, Inc., Irvine, CA (United States)
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

1- and 2-D simulations of 1-cm radius, gas-puff liners of Ne, Ar, Kr, and Xe imploding onto a deuterium target are conducted using the discharge parameters for the Zebra (1 MA, 130 ns) driver using the resistive MHD code MACH2. This is an implementation of the Staged Z-pinch concept, in which the target is driven to high-energy-density first by shock compression launched by a diffused azimuthal magnetic field (J×B force), and then by the adiabatic compression as the liner converges on axis. During the run-in phase, the initial shock heating preheats the deuterium plasma, with a subsequent stable, adiabatic compression heating the target to high energy density. Shock compression of the target coincides with the development of a J×B force at the target/liner interface. Stronger B-field transport and earlier shock compression increases with higher-Z liners, which results in an earlier shock arrival on axis. As a result, delayed shock formation in lower-Z liners yields a relative increase in shock heating, however, the 2-D simulations show an increased target isolation from magneto-Rayleigh-Taylor instability penetration, suggesting that an optimal balance between these two effects is reached in an Ar or Kr liner, rather than with Xe.

View Accepted Manuscript (DOE)

Research Organization:: Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)

Sponsoring Organization:: USDOE Advanced Research Projects Agency - Energy (ARPA-E); USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: AC04-94AL85000; AR0000569

OSTI ID:: 1340520

Alternate ID(s):: OSTI ID: 1987920

Report Number(s):: SAND--2016-9947J; 648005

Journal Information:: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 12 Vol. 23; ISSN 1070-664X

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

Country of Publication:: United States

Language:: English

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Cited By (2)

Ar and Kr on deuterium gas-puff staged Z-pinch implosions on a 1-MA driver: Experiment and simulation Rahman, H. U.; Ruskov, E.; Ney, P. Physics of Plasmas, Vol. 26, Issue 5 https://doi.org/10.1063/1.5085673	journal	May 2019
A semi-analytic model of gas-puff liner-on-target magneto-inertial fusion Narkis, J.; Rahman, H. U.; Valenzuela, J. C. Physics of Plasmas, Vol. 26, Issue 3 https://doi.org/10.1063/1.5086056	journal	March 2019

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