Abstract
The temporal development of the current of a discharge leading to breakdown was investigated under static and homogeneous field conditions with wide band oscilloscopic techniques. The discharges were started by 103 to 105 electrons released within some 10−9 sec along traces of single α-particles parallel to the electric field.
Measurements have shown that streamer mechanism occurs in gases as CH4 and CO2 at static breakdown, if a sufficient density of space charge is produced by a great number of overlapping avalanches. The gas amplification of thesingle avalanche only has a value of about 105. Also in O2 and dry air at highpd-values breakdown develops with streamer mechanism. — In electronegative gases as freon 12 and O2 a prolongation of the time necessary for streamer formation is caused by the reduction of the effective total space charge by the negative ions.
The results of a detailed study of the time necessary for streamer development and the time constant of the increase of the current leading to breakdown confirm the model of streamer mechanism.
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Herrn Professor Dr. H.Raether, dem Leiter des Instituts für Angewandte Physik der Universität Hamburg, möchte ich für die Anregung zu dieser Arbeit und für viele Diskussionen herzlich danken.
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Schlumbohm, H. Untersuchungen über die Entwicklung des Kanaldurchschlags in Gasen. Z. Physik 170, 233–248 (1962). https://doi.org/10.1007/BF01378465
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DOI: https://doi.org/10.1007/BF01378465