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Effect of cathode emissivity on runaway electron beam formation in gas-filled diode with inhomogeneous electric field

V. A. Shklyaev^ab, V. V. Ryzhov<sup>ab

a</sup> Institute of High Current Electronics, Siberian Branch of the Russian Academy of Sciences, Tomsk
^b Tomsk Polytechnic University

Abstract: Mechanisms of the formation of runaway electron beams at the initial stage of breakdown in a gasfilled diode with sharply inhomogeneous electric field have been studied by numerical simulations using a specially developed PIC/MC code. It is established that a beam of runaway electrons can be generated either immediately at the cathode or at a discharge plasma boundary. The obtained dependence of the runaway electron beam current on the state of the cathode surface (emissivity) has the characteristic shape.

Received: 03.09.2010

 English version: Technical Physics Letters, 2011, 37:1, 72–74

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