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Title: Pulse shaping techniques with nested wire arrays.

Abstract

Abstract not provided.

Authors:
; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1137267
Report Number(s):
SAND2007-1966C
523783
DOE Contract Number:
AC04-94AL85000
Resource Type:
Conference
Resource Relation:
Conference: Proposed for presentation at the The 7th International Workshop on the Physics of Wire Array Z-pinches, at PowderMills hotel held April 2-5, 2007 in Battle, England.
Country of Publication:
United States
Language:
English

Citation Formats

Ampleford, David J., Cuneo, Michael Edward, Sinars, Daniel Brian, Jennings, Christopher A., Lebedev, S.V., Bland, S.N., Bott, S.C, Hall, G.N., Suzuki, F., and Chittenden, J.P. Pulse shaping techniques with nested wire arrays.. United States: N. p., 2007. Web.
Ampleford, David J., Cuneo, Michael Edward, Sinars, Daniel Brian, Jennings, Christopher A., Lebedev, S.V., Bland, S.N., Bott, S.C, Hall, G.N., Suzuki, F., & Chittenden, J.P. Pulse shaping techniques with nested wire arrays.. United States.
Ampleford, David J., Cuneo, Michael Edward, Sinars, Daniel Brian, Jennings, Christopher A., Lebedev, S.V., Bland, S.N., Bott, S.C, Hall, G.N., Suzuki, F., and Chittenden, J.P. Thu . "Pulse shaping techniques with nested wire arrays.". United States. doi:. https://www.osti.gov/servlets/purl/1137267.
@article{osti_1137267,
title = {Pulse shaping techniques with nested wire arrays.},
author = {Ampleford, David J. and Cuneo, Michael Edward and Sinars, Daniel Brian and Jennings, Christopher A. and Lebedev, S.V. and Bland, S.N. and Bott, S.C and Hall, G.N. and Suzuki, F. and Chittenden, J.P.},
abstractNote = {Abstract not provided.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Mar 01 00:00:00 EST 2007},
month = {Thu Mar 01 00:00:00 EST 2007}
}

Conference:
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  • Abstract not provided.
  • No abstract prepared.
  • Nested wire-array Z pinches are shown to generate soft x-ray radiation pulse shapes required for three-shock isentropic compression and hot-spot ignition of high-yield inertial confinement fusion capsules. We demonstrate a reproducible and tunable foot pulse (first shock) produced by interaction of the outer and inner arrays. A first-step pulse (second shock) is produced by inner array collision with a central CH{sub 2} foam target. Stagnation of the inner array at the axis produces the third shock. Capsules optimized for several of these shapes produce 290-900 MJ fusion yields in 1D simulations.
  • The Magnetohydrodynamic (MHD) Rayleigh-Taylor (RT) instability is believed to be one of the limiting factors in z-pinch performance. More specifically, for high velocity, large diameter implosions characteristic of the Z accelerator, numerical calculations suggests that this instability broadens the plasma shell and can account for experimentally measured pulse widths greater than 6 ns. To improve pinch performance, uniform fills, tailored density profiles, tuning layers, and B{sub z} stabilization have been proposed to mitigate the RT growth. In all of these schemes, a trade-off exists between improved stability and decreased energy coupling with the machine. The simplest of these techniques tomore » implement and optimize experimentally is the tuning layer. Numerical simulations are presented for a series of nested wire array experiments which were based on the concept of the tuning layer. Further analysis based on the experimental data will be presented including resolution effects, the role that mass accretion and deceleration may play in mitigating RT, and the characterization of the inner wire array distribution prior to impact.« less