Publication: The ionization waves propagation in a long capillary dielectric tube in the absence of surface charge
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2020
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© 2020 Published under licence by IOP Publishing Ltd.The initiation of the electrical breakdown in a narrow tube filled with a gas under reduced pressure requires the voltage higher compared to that for a much broader tube. Besides, at the fixed applied voltage formally sufficient for breakdown, the probability for the breakdown happening in a narrow tube is far from 100%. This probability can be increased appreciably if to organize the surface ionization waves preceding the volume breakdown in a narrow tube. The breakdown development in a long capillary dielectric tube induced by the surface ionization waves was investigated in this work. The experiments were carried out with the use of a quartz capillary tube with a high aspect ratio of length to diameter. The tube was filled with helium at pressures of 1-30 Torr. The pre-posited surface charge on the tube wall was absent. It has been found the completed high-current breakdown between two electrodes located at the ends of the long capillary tube develops with a high probability with the presence of surface ionization waves within the tube.
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The ionization waves propagation in a long capillary dielectric tube in the absence of surface charge / Balakirev, A.A. [et al.] // Journal of Physics: Conference Series. - 2020. - 1588. - № 1. - 10.1088/1742-6596/1588/1/012043