Grid control over high currents in a cesium discharge with a cathode spot


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Abstract

We report on the results of investigation of a plasma switch with complete grid control in a discharge with a cathode spot on the liquid-metal cesium cathode without grid diaphragming. The retention of the working area of the grid relative to the anode area leads to an order-of-magnitude increase in the switching anode current (up to 20 A/cm2 over the anode area) and a substantial (up to 100 V and higher) increase in the switching voltages. The use of the cathode jet makes it possible to reduce the working pressures of cesium vapor (down to 10–3 Torr). We discuss the results of analysis of peculiarities of grid discharge quenching in such a switch, which make it possible to determine possible reasons for limitation of the working parameters of the switch and the ways of their further increase.

About the authors

V. B. Kaplan

Ioffe Physical Technical Institute

Email: stolyarov@mail.ioffe.ru
Russian Federation, Politekhnicheskaya ul. 26, St. Petersburg, 194021

A. M. Martsinovskii

Ioffe Physical Technical Institute

Email: stolyarov@mail.ioffe.ru
Russian Federation, Politekhnicheskaya ul. 26, St. Petersburg, 194021

I. I. Stolyarov

Ioffe Physical Technical Institute

Author for correspondence.
Email: stolyarov@mail.ioffe.ru
Russian Federation, Politekhnicheskaya ul. 26, St. Petersburg, 194021

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