OPERATING CHARACTERISTICS OF THE CROSSED-FIELD CLOSING SWITCH

The function of the crossed-field closing switch (CFCS) has has been studied over a wide range of variables. Three different modes of conduction have been observed: the conventional crossed-field discharge, a hybrid hollow-cathode discharge, and the vacuum arc. Depending on the amplitude and duration of the current, conduction may typically pass through these modes in the above sequence. The CFCS may be triggered magnetically or by grid control into a number of states with varying levels of voltage drop. Conduction may be allowed in the reverse direction or prevented. The present design is limited in response speed and repetition rate by the inductance of the grid and anode leads, the lack of efficient pressure control, and the need for a pulsed magnetic field. Criteria are presented which show the directions in which extrapolations in design may lead. It is concluded that the CFCS is potentially capable of performing some functions more reliably or effectively than conventional switching devices, and variants of the device may eventually be capable of performing functions not presently achievable by any other means. Copyright © 1979 by The Institute of Electrical and Electronics Engineers, Inc.