Lower bounds for the kinetic energy and resistance of wire array Z pinches on the Z pulsed-power accelerator

Approximate lower bounds for the kinetic energy and magnetic flux dissipation for tungsten wire arrays on the Z pulsed-power accelerator at Sandia National Laboratories [R. B. Spielman et al. , Phys. Plasmas 5, 2105 (1998)] are obtained. A procedure, extending previous work determining pinch inducta...

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Bibliographic Details
Published in:Physics of plasmas 2008-04, Vol.15 (4), p.042702-042702-13
Main Authors: Waisman, Eduardo M., Cuneo, M. E., Lemke, R. W., Sinars, D. B., Stygar, W. A.
Format: Article
Language:English
Subjects:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ACCELERATORS
DATA ANALYSIS
ENERGY BALANCE
IMPLOSIONS
INDUCTANCE
KINETIC ENERGY
MAGNETIC FLUX
PEAK LOAD
PLASMA
PLASMA GUNS
TIME DEPENDENCE
TUNGSTEN
X RADIATION
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Summary:Approximate lower bounds for the kinetic energy and magnetic flux dissipation for tungsten wire arrays on the Z pulsed-power accelerator at Sandia National Laboratories [R. B. Spielman et al. , Phys. Plasmas 5, 2105 (1998)] are obtained. A procedure, extending previous work determining pinch inductance as a function of time [E. M. Waisman et al. , Phys. Plasmas 11, 2009 (2004)], is introduced and applied to electrical and x-ray energy measurements. It employs the pinch energy balance to determine lower bounds for the plasma kinetic energy just before the main pinch reaches the axis and for the magnetic flux dissipation during stagnation. From the lower bound for the dissipated flux, a lower bound for pinch resistance after x-ray peak power is estimated. The results of applying the introduced energy balance procedure to selected tungsten wire array implosions on Z are given. It is believed that this is the first time that a measure of wire array Z-pinch resistance at stagnation is obtained purely from data analysis without recourse to specific assumptions on the plasma motion.
ISSN:1070-664X
1089-7674
DOI:10.1063/1.2898724