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Title: Modeling of Radiative Properties of the Wire Array Z-Pinches

Abstract

Recent experiments show that the wire-array z-pinch plasmas are strongly inhomogeneous at small scales. The inhomogeneities are not shot-to-shot reproducible while the arrays provide extremely reproducible x-ray pulses and generate mega-joules of radiation at implosion. This is possible if small-scale structures are averaged in the implosion dynamics and if the energy balance and radiation production are mainly determined by the macroscopic, space-averaged plasma properties. We suggest that the basic physics of radiating wire array implosions could be modeled within a quasi-1D large-scale description. We show that such a quasi-1D hydro model reproduces basic radiative properties of the wire-array z-pinches if the Spitzer resistivity is enhanced by a factor, proportional to {beta}2, where {beta} {omega}e{tau}e is the Hall parameter. It becomes possible to explain the radiation pulse shapes and high experimental efficiency of magnetic energy conversion into radiation in the most powerful laboratory x-ray sources. Our results also reproduce some recently discovered properties of these x-ray sources, such as trailing mass during the implosion and radiation beginning before arrival of the entire imploding mass onto the axis.

Authors:
 [1];  [2];  [3]
  1. Laboratoire de Physique et Technologie des Plasmas, Ecole Polytechnique, 91128 Palaiseau (France)
  2. Icarus Research, Inc., P.O. Box 30780, Bethesda, MD 20824-0780 (United States)
  3. Plasma Physics Division, Naval Research Laboratory, Washington, DC 20375 (United States)
Publication Date:
OSTI Identifier:
20729284
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 808; Journal Issue: 1; Conference: 6. international conference on dense Z-pinches, Oxford (United Kingdom), 25-28 Jul 2005; Other Information: DOI: 10.1063/1.2159385; (c) 2006 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; COMPUTERIZED SIMULATION; EFFICIENCY; ENERGY CONVERSION; EXPLODING WIRES; IMPLOSIONS; LONGITUDINAL PINCH; MASS; PLASMA; PLASMA SIMULATION; PULSE SHAPERS; PULSES; X RADIATION; X-RAY SOURCES

Citation Formats

Chuvatin, A.S., Rudakov, L.I., and Velikovich, A.L.. Modeling of Radiative Properties of the Wire Array Z-Pinches. United States: N. p., 2006. Web. doi:10.1063/1.2159385.
Chuvatin, A.S., Rudakov, L.I., & Velikovich, A.L.. Modeling of Radiative Properties of the Wire Array Z-Pinches. United States. doi:10.1063/1.2159385.
Chuvatin, A.S., Rudakov, L.I., and Velikovich, A.L.. Thu . "Modeling of Radiative Properties of the Wire Array Z-Pinches". United States. doi:10.1063/1.2159385.
@article{osti_20729284,
title = {Modeling of Radiative Properties of the Wire Array Z-Pinches},
author = {Chuvatin, A.S. and Rudakov, L.I. and Velikovich, A.L.},
abstractNote = {Recent experiments show that the wire-array z-pinch plasmas are strongly inhomogeneous at small scales. The inhomogeneities are not shot-to-shot reproducible while the arrays provide extremely reproducible x-ray pulses and generate mega-joules of radiation at implosion. This is possible if small-scale structures are averaged in the implosion dynamics and if the energy balance and radiation production are mainly determined by the macroscopic, space-averaged plasma properties. We suggest that the basic physics of radiating wire array implosions could be modeled within a quasi-1D large-scale description. We show that such a quasi-1D hydro model reproduces basic radiative properties of the wire-array z-pinches if the Spitzer resistivity is enhanced by a factor, proportional to {beta}2, where {beta} {omega}e{tau}e is the Hall parameter. It becomes possible to explain the radiation pulse shapes and high experimental efficiency of magnetic energy conversion into radiation in the most powerful laboratory x-ray sources. Our results also reproduce some recently discovered properties of these x-ray sources, such as trailing mass during the implosion and radiation beginning before arrival of the entire imploding mass onto the axis.},
doi = {10.1063/1.2159385},
journal = {AIP Conference Proceedings},
number = 1,
volume = 808,
place = {United States},
year = {Thu Jan 05 00:00:00 EST 2006},
month = {Thu Jan 05 00:00:00 EST 2006}
}