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JOURNALS // Teplofizika vysokikh temperatur // Archive

TVT, 2014 Volume 52, Issue 5, Pages 797–799 (Mi tvt1252)

This article is cited in 2 papers

Short Communications

Features of emission of electrodes in a railgun with a plasma piston (emission crisis)

G. V. Tkachenko, B. A. Uryukov

Frantsevich Institute of Materials Science Problems, National Academy of Sciences of Ukraine

Abstract: The problem of matching the electronic emission current from the cathode and the charge current can appear at high acceleration rates of a solid in a railgun with a plasma piston because of the high current density needed and the small time of the contact between the charge and the electrode. The conditions under which this effect (emission crisis) is manifested have been found. This effect leads to a decrease in the plasma piston speed and, respectively, to a decrease in the acceleration speed up to a full stop. Experimental diagrams of the piston motion in the railgun are presented, and the acceleration regions in which the emission crisis may occur are revealed.

UDC: 533.9

Received: 29.01.2014

DOI: 10.7868/S0040364414050196


 English version:
High Temperature, 2014, 52:5, 774–777

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