Argon gas puff implosion experiments and two-dimensional modeling
- Physics International Company, 2700 Merced Street, San Leandro, California 94577 (United States)
- Naval Research Laboratory, 4555 Overlook Ave., SW, Washington, D.C. 20375 (United States)
The [ital K]-shell x ray yields from argon gas puff Z pinches are observed to increase from 3.5[plus minus]1.0 kJ to 13[plus minus]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.
- OSTI ID:
- 6783673
- Journal Information:
- Physics of Fluids B; (United States), Journal Name: Physics of Fluids B; (United States) Vol. 5:3; ISSN PFBPEI; ISSN 0899-8221
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
700370* -- Plasma Fluid & MHD Properties-- (1992-)
ARGON
ELECTROMAGNETIC RADIATION
ELECTRONIC STRUCTURE
ELEMENTS
FLUID MECHANICS
FLUIDS
GASES
HYDRODYNAMICS
IMPLOSIONS
IONIZING RADIATIONS
K SHELL
MAGNETOHYDRODYNAMICS
MECHANICS
NONMETALS
NOZZLES
PINCH DEVICES
PINCH EFFECT
PLASMA DENSITY
RADIATIONS
RARE GASES
THERMONUCLEAR DEVICES
TWO-DIMENSIONAL CALCULATIONS
X RADIATION