Simulations of V-I characteristics in a plasma-focus gun

Tou, T.Y. and Chin, O.H. and Chen, Y.H. (1992) Simulations of V-I characteristics in a plasma-focus gun. IEEE Transactions on Plasma Science, 20 (5). pp. 507-514. ISSN 0093-3813

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Abstract

The voltage (V) and current (I) characteristics in a plasma focus gun are simulated to yield the current efficiency and the rundown velocity of the current sheath. Since the discharge circuit is strongly influenced by the rundown dynamics of the current sheath, the simple snowplow model, which is modified to include the time-varying current and mass efficiencies, f and k, respectively, is employed. The computer simulations are carried out for two separate experiments using deuterium and argon gas. A steady state of constant rundown velocity and saturated sheath current for both gases is correlated to the maximum holding voltage of the glass insulator. As much as 27 of the total discharge current for the deuterium gas and 33 for argon gas stay behind as leakage currents around the glass insulator when the radial compression phase begins.

Item Type: Article
Uncontrolled Keywords: Run-down phase,
Subjects: Q Science > QC Physics
Divisions: Faculty of Science > Dept of Physics
Depositing User: miss munirah saadom
Date Deposited: 17 Jul 2013 00:23
Last Modified: 20 Mar 2019 07:10
URI: http://eprints.um.edu.my/id/eprint/7717

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