New concepts for high current selfsustained diffuse discharge closing switches
Abstract
Developed are new switching concepts that potentially can increase the efficiency and stability of high current diffuse discharges when used in repetitive fast closing switch applications. The primary advantage of diffuse discharges over spark gap closing switches is that a diffuse discharge has a much faster recovery time (less than 10 to the 4 s) compared to an arc discharge (more than 10 to the 3 s), enabling the switch to be operated at high repetition rates. The major disadvantage of diffuse discharges are the high sustaining voltage across the discharge and the resultant high switch impedance (several ohms) compared with spark gaps (much less than 1 ohm). Also explored is a new diffuse glow discharge operating scheme with a new type of gas mixture whose components collectively possess an ionization coefficient, alpha/N, at low E/N which is larger than the attachment coefficient, eta/N, over a given, E/N range, while at higher E/N values, eta/N is larger than alpha/N over another range of E/N values.
 Publication:

Presented at the 6th Institute of Electrical and Electronic Engineers Pulsed Power Conference
 Pub Date:
 1987
 Bibcode:
 1987pupo.confQ....H
 Keywords:

 Closing;
 Diffusion;
 High Current;
 Switches;
 Efficiency;
 Gases;
 Ionization;
 Lasers;
 Switching Circuits;
 Electronics and Electrical Engineering