Effect of anode and insulator materials on plasma focus sheath (pinch) current

Plasma sheath (pinch) current in a low energy (2.2 kJ) plasma focus device was measured fur different anode and insulator materials. Among the anode materials, the highest sheath current was observed with tungsten and the lowest with aluminum. Among the ceramic insulators the maximum plasma sheath c...

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Bibliographic Details
Published in:IEEE transactions on plasma science 1997-10, Vol.25 (5), p.1166-1168
Main Authors: Shyam, A., Rout, R.K.
Format: Article
Language:English
Subjects:
Anodes
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Conductivity of specific materials
Current measurement
Electronic transport in condensed matter
Energy measurement
Exact sciences and technology
Impurities
Instruments
Insulation
Insulators
Magnetic confinement and equilibrium
Materials science
Physics
Physics of gases, plasmas and electric discharges
Physics of plasmas and electric discharges
Plasma
Plasma devices
Plasma materials processing
Plasma measurements
Plasma sheaths
Pollution measurement
Theta pinch
Z-Pinch, theta pinch, plasma focus and other pinch devices
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Summary:Plasma sheath (pinch) current in a low energy (2.2 kJ) plasma focus device was measured fur different anode and insulator materials. Among the anode materials, the highest sheath current was observed with tungsten and the lowest with aluminum. Among the ceramic insulators the maximum plasma sheath current was obtained with quartz and the minimum with alumina. The computed high Z (atomic number) impurities in plasma sheath, however, were least in the plasma focus with alumina insulator. None of the nonceramic (plastic) insulators produced neutrons, as the plasma sheath was nonuniform and was highly contaminated with impurities.
ISSN:0093-3813
1939-9375
DOI:10.1109/27.649641