Argon gas puff implosion experiments and two‐dimensional modeling
作者:
C. Deeney,
P. D. LePell,
F. L. Cochran,
M. C. Coulter,
K. G. Whitney,
J. Davis,
期刊:
Physics of Fluids B: Plasma Physics
(AIP Available online 1993)
卷期:
Volume 5,
issue 3
页码: 992-1001
ISSN:0899-8221
年代: 1993
DOI:10.1063/1.860949
出版商: AIP
数据来源: AIP
摘要:
TheK‐shell x ray yields from argon gas puff Z pinches are observed to increase from 3.5±1.0 kJ to 13±1.0 kJ when inwardly tilted nozzles are used on a 6 TW, 4 MA generator. This increase is associated with the elimination of the zipper effect and the achievement of higher density plasmas, as confirmed by x‐ray diagnostics. Two‐dimensional (2‐D) magnetohydrodynamic modeling of the gas puff implosions indicates that the collapsing shell reaches a higher density and smaller diameter when the axial zipper is eliminated. The calculations show that axial mass flow in the zippering cases result in nonhollow collapses which limit the final pinch radii and densities. The calculations also indicate that narrower nozzle exits contribute to increasing the assembled plasma density.
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