抄録
We found that two parallel channel discharges were sustained stably within a discharge vessel. The discharge vessel is made of an inner glass tube and an outer glass bulb of a concentric construction. An oxide cathode is located within the inner tube and two rod anodes are arranged within the outer bulb in symmetry with the axis. The discharge between the cathode and the two anodes is folded back at the open end of the inner tube and then divided into two channels of the same current within the space bounded by the inner tube and the outer bulb. It was found that a high frequency current based on anode oscillation was superposed on the discharge current in these two channel discharges.
It was also found that the static V-I characteristics had positive resistance characteristics in the region of small discharge currents, which were attributed to the charged particles' diffusion between two parallel channel discharges. An analysis shows that the superposition of high frequency current enhances positive resistance characteristics in our two channel discharges.
