  Basing on 2D computer simulation of physical processes in high-voltage
reversibly-switched dynistors (RSD) important peculiarities of their
submicrosecond pulse performance mechanisms have been studied. It is
characteristic that on early stages of switching fronts rather great voltage
spikes and dangerous delays in current rise are observed. These undesirable
manifestations are found to be eliminated due to appropriate reduction of the
doping in p-base. Following this way for RSD with blocking voltage of 2.5-5 kV
at the value of reversibly pumped charge 5-10 uC/cm^2 one can diminished the
switching front duration up to 75-100 ns and lower. As for the current rise
rate it can be increased up to (20-30) A/cm^2/ns, i.e., more then the order
higher of the similar parameter for the standard RSD. For the switching pulse
amplitudes of few unites kA and with the total pulse duration of several
hundred nanoseconds the energy transmitted to the load can reach fractions and
units of joules per cycle at the power losses in RSD nearly 10% of these
values.
