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Effects of shock wave on laser‐induced discharge under a nonuniform DC electric field
Author(s) -
Ohsako Yasushi,
Nagasawa Satoru,
Cho Mengu,
Hikita Masayuki,
Takeno Hiromasa
Publication year - 2001
Publication title -
electrical engineering in japan
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.136
H-Index - 28
eISSN - 1520-6416
pISSN - 0424-7760
DOI - 10.1002/eej.1075
Subject(s) - shock wave , electrode , electric field , plasma , plasma channel , materials science , laser , mach number , arc flash , shock (circulatory) , optics , voltage , electric discharge , lightning (connector) , atomic physics , mechanics , physics , optoelectronics , insulator (electricity) , power (physics) , quantum mechanics , medicine
Laboratory experiments and numerical simulations have been carried out to study the mechanisms of laser‐induced discharge under a nonuniform DC electric field as a basic research for the laser‐induced lightning. Plasma was produced between a rod–plane electrode gap. The electron density was measured via the Mach–Zehnder interferometer. The laser‐produced plasma channel serves as an extended rod electrode once the channel becomes a leader. The shock wave generated from the laser‐produced plasma has two effects. It produces a rarefied gas region in the gap, which further decreases the flashover voltage. On the other hand, stagnation at the surface of the rod electrode enhances the gas density and obstructs the leader formation. © 2001 Scripta Technica, Electr Eng Jpn, 137(1): 9–16, 2001