| Reversely Switched Dynistor (RSD) is a unique type of high power and microsecond solid switch based on the theory of controlled plasma. Since RSD can achieve the great traits of conducting in microseconds or nanoseconds and having several hundreds of kA current, several tens of kV large voltage at the same time, it is one of the ideal switches in modern pulsed power system. It has been shown that RSD can conduct over the whole device uniformly and simultaneously, which improves the current capacity. So RSD is a very promising device for application in pulsed power technology.This thesis firstly introduces the basic triggering circuit and its operation theory, which includes pre-charge process and turn-on process. Then the critical conditions are presented. The conversion characteristics of RSD with the structure of"thin-base, buffer and transparent anode"is discussed particularly from the performance of turn-on, forward-block and turn-off process. The results obtained show that this new structure can have a good trade off among conducting, turning-off and switching characteristics. The influence of the buffer on pre-charge process and blocking voltage is also investigated through calculating. It is proven that this new structure benefits for the repetitive pulsed power application.Two experimental projects are carried out in our lab, by means of different ways building p+ layer in the anode. Several batches of samples are made successfully. In contrast with the conducting wave figures of different samples, it is shown that the influence of the buffer to different fabricating process. The reason is also analyzed. It is shown that the way of Al sinter can make the transparent anode successfully through FSEM testing. Cathode mask is also adjusted in order to have a better characteristic. The new cathode mask can improve the process of pre-charge charge and increase dV/dt. All these results are useful to application of RSD. |
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