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Title: Time dependent x-ray emission from a krypton gas puff z-pinch plasma

Abstract

In this study the authors investigate and assess the radiative potential of a superclass pulsed power driven Z-pinch plasma load. The generator is represented by a driver capable of producing short circuit currents of 60, 80, and 100 mega-amps to a load over 100 ns current risetime. For a prescribed set of electrical characteristics the authors characterize the radiative performance of Rayleigh-Taylor stable loads. The purpose of this investigation is to compare and contrast the differences resulting from: (1) two temperatures vs. one temperature and (2) a time dependent vs. an equilibrium treatment of the non-LTE ionization physics and their influence on the L- and K-shell dynamics and how they influence the K-shell yield for krypton loads. The loads are represented as either 3 cm radius annular shells or uniform fills of 3, 5, and 7 cm radius and 3 cm length, respectively. The simulations are done with a multi-zone 1-D two temperature radiation MHD model self-consistently coupled to a driving circuit. The results show that both time dependence and two temperatures affect the implosion dynamics and the magnitude of the K-shell yields but that the total yield remains unaffected for the most part. For a 3 cm radius loadmore » the shell is more efficient at converting kinetic energy to K-shell radiation than a uniform fill at the same radius. The 5 and 7 cm uniform fills are stable and good K-shell radiators. Unfortunately, the two temperature time dependent simulated yields above 10 keV are found to be significantly less than the one temperature and equilibrium simulations.« less

Authors:
; ;  [1]
  1. Naval Research Lab., Washington, DC (United States)
Publication Date:
OSTI Identifier:
178276
Report Number(s):
CONF-950612-
ISBN 0-7803-2669-5; TRN: 96:006741
Resource Type:
Conference
Resource Relation:
Conference: 22. international conference on plasma science, Madison, WI (United States), 5-8 Jun 1995; Other Information: PBD: 1995; Related Information: Is Part Of IEEE conference record -- abstracts: 1995 IEEE international conference on plasma science; PB: 312 p.
Country of Publication:
United States
Language:
English
Subject:
07 ISOTOPE AND RADIATION SOURCE TECHNOLOGY; 70 PLASMA PHYSICS AND FUSION; LINEAR Z PINCH DEVICES; X RADIATION; X-RAY SOURCES; PERFORMANCE; TIME DEPENDENCE; RAYLEIGH-TAYLOR INSTABILITY; COMPARATIVE EVALUATIONS; PLASMA SIMULATION

Citation Formats

Davis, J., Giuliani, J.L. Jr., and Rogerson, J. Time dependent x-ray emission from a krypton gas puff z-pinch plasma. United States: N. p., 1995. Web.
Davis, J., Giuliani, J.L. Jr., & Rogerson, J. Time dependent x-ray emission from a krypton gas puff z-pinch plasma. United States.
Davis, J., Giuliani, J.L. Jr., and Rogerson, J. Sun . "Time dependent x-ray emission from a krypton gas puff z-pinch plasma". United States.
@article{osti_178276,
title = {Time dependent x-ray emission from a krypton gas puff z-pinch plasma},
author = {Davis, J. and Giuliani, J.L. Jr. and Rogerson, J.},
abstractNote = {In this study the authors investigate and assess the radiative potential of a superclass pulsed power driven Z-pinch plasma load. The generator is represented by a driver capable of producing short circuit currents of 60, 80, and 100 mega-amps to a load over 100 ns current risetime. For a prescribed set of electrical characteristics the authors characterize the radiative performance of Rayleigh-Taylor stable loads. The purpose of this investigation is to compare and contrast the differences resulting from: (1) two temperatures vs. one temperature and (2) a time dependent vs. an equilibrium treatment of the non-LTE ionization physics and their influence on the L- and K-shell dynamics and how they influence the K-shell yield for krypton loads. The loads are represented as either 3 cm radius annular shells or uniform fills of 3, 5, and 7 cm radius and 3 cm length, respectively. The simulations are done with a multi-zone 1-D two temperature radiation MHD model self-consistently coupled to a driving circuit. The results show that both time dependence and two temperatures affect the implosion dynamics and the magnitude of the K-shell yields but that the total yield remains unaffected for the most part. For a 3 cm radius load the shell is more efficient at converting kinetic energy to K-shell radiation than a uniform fill at the same radius. The 5 and 7 cm uniform fills are stable and good K-shell radiators. Unfortunately, the two temperature time dependent simulated yields above 10 keV are found to be significantly less than the one temperature and equilibrium simulations.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1995},
month = {12}
}

Conference:
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