Comparative Investigations of Shock-Ionized Dynistors

The results of investigations of shock-ionized dynistors (SIDs), which differ in the value of the maximum voltage that is blocked in the static state, the structure diameter, and the profile of the edge contour (chamfer), are presented. It is shown that when SIDs with different maximum permissible voltages switch high-power current pulses of nanosecond duration they have similar values of switching energy losses. Experiments that indirectly confirm a uniform current distribution over the working area of an SID after its switching-over are described. The results of comparative studies of SIDs with forward and inverse chamfers are presented, which indicate that they have different switching characteristics. An explanation of these results is given.