Abstract

Referring to optical images of self-quenching streamer (SQS), we have already proposed a possible mechanism of SQS induced by /spl alpha/-rays. To check the validity of the mechanism, we have been designing a model for the computer simulation of SQS propagation. In the present modelling, in order to calculate the discharge growth, a set of continuity equations for electrons and ions is numerically solved in a two-dimensional space. Electron supply from the alpha-ray ionization track is assumed to be dominant process for the streamer development instead of the conventional electron-supply process which is based on the photoionization in the gas medium. The streamer propagation is simulated under the concept of a two-region model. A first comparison between computed and experimental results shows a good agreement. >

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