An investigation of the secondary electron emission coefficient of aluminum and graphite disc electrodes

الملخص EN

Gas discharge characteristics are seriously influenced by the secondary electron emission coefficient which was originally defined by Townsend.

In this paper, six cases of gas discharge parallel disc anode - cathode of the same/different diameter using similar/not aluminum and graphite were investigated.

The relations of secondary electron emission coefficient and its inverse versus the pressure-distance product for different gas discharge cases were determined.

The secondary electron emission coefficient has a maximum value at the higher diameter and work function of anode disc material, lower diameter and work function of cathode disc material and its reverse polarity has a minimum value .Also, the breakdown voltage versus pressure-distance product for these cases at secondary electron emission coefficient equal to0.1, 0.01, 0.001 and 0.0001 wasdetermined.