Experimental studies of a generation delay time in reflex triode with inductive storage

It has been found recently that the process of high power microwave oscillation in reflex triode with inductive storage distinguished considerably from that in conventional schedules, when as the source of a voltage, the high current accelerators with forming lines were used. This is because of the delay time between the beginnings of the oscillations and current pulse in diode. The generation was began, as a rule, in a phase when the current decreased, and the power efficiency in this case was rather low. The fact that the generation delay time was proportional to the current rise-time gave some hopes to increase the efficiency by shortening the current rise-time. We have found experimentally that the decrease of the current pulse rise-time causes the shortening of the generation delay time, but the power efficiency was not increased. As a result of the increase of the beam maximum current the generation starts at the current pulse forward front.