An experimental study of negative discharge in a 1.3 m point-plane air gap: the function of the space stem in the propagation mechanism

Reports a study of the origin and propagation of the space stem when a bi-exponential voltage impulse is applied to a 1.3 m point-plane air gap. The tests were carried out using impulse shapes ranging from 0.25/2000 to 120/2000 \#m\s. The optimum with respect to space stem formation was 0.3/2000 \#m...

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Bibliographic Details
Published in:Journal of physics. D, Applied physics Applied physics, 1995-11, Vol.28 (11), p.2306-2313
Main Authors: Reess, T, Ortega, P, Gibert, A, Domens, P, Pignolet, P
Format: Article
Language:English
Subjects:
Electric discharges
Engineering Sciences
Exact sciences and technology
Other gas discharges
Physics
Physics of gases, plasmas and electric discharges
Physics of plasmas and electric discharges
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Summary:Reports a study of the origin and propagation of the space stem when a bi-exponential voltage impulse is applied to a 1.3 m point-plane air gap. The tests were carried out using impulse shapes ranging from 0.25/2000 to 120/2000 \#m\s. The optimum with respect to space stem formation was 0.3/2000 \#m\s. Photographs obtained with an image converter allowed identification of the following phenomena: negative streamers; a Trichel zone; a negative corona; a cathodic zone (cathodic stem); positive streamers; and space stems. The 5/2000 \#m\s impulse shape led to a quasi-continuous space stem propagation in the gap. (Original abstract-amended)
ISSN:0022-3727
1361-6463
DOI:10.1088/0022-3727/28/11/011