Time dependent x-ray emission from a krypton gas puff z-pinch plasma
- Naval Research Lab., Washington, DC (United States)
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.
- OSTI ID:
- 178276
- Report Number(s):
- CONF-950612-; ISBN 0-7803-2669-5; TRN: 96:006741
- 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
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