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Research on the time and mechanism of laser-induced air plasmas ignition
Author(s): Guixia Wang; Junhong Su
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Paper Abstract

To research the initiation of breakdown and the earliest stages of plasma formation, analyzing the ignition time and mechanism is necessary. The ignition time of laser-induced air plasmas is numerically simulated on the basis of air breakdown conditions in atmospheric air. This time is on the order of a few nanoseconds, and increases with increasing laser facula radius and pulse width, and decreases with increasing laser wavelength and incident laser energy. In addition, images obtained using a high-speed camera (NX5-X2) indicate that the ignition process of laser-induced air plasmas includes preionization, ionization, significant ionization, plasma shielding , plasma ignition and extinction.

Paper Details

Date Published: 8 July 2019
PDF: 7 pages
Proc. SPIE 11064, Tenth International Conference on Thin Film Physics and Applications (TFPA 2019), 1106411 (8 July 2019); doi: 10.1117/12.2539866
Show Author Affiliations
Guixia Wang, Xi'an Technological Univ. (China)
Junhong Su, Xi'an Technological Univ. (China)

Published in SPIE Proceedings Vol. 11064:
Tenth International Conference on Thin Film Physics and Applications (TFPA 2019)
Junhao Chu; Jianda Shao, Editor(s)

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