Title :
Measurement of a 2-dimensional electron density distribution over air-blast arc discharge using Shack-Hartmann type laser wavefrom sensor
Author :
Inada, Y. ; Yamagami, S. ; Matsuoka, S. ; Kumada, A. ; Ikeda, H. ; Hidaka, K.
Author_Institution :
The University of Tokyo, 3-1, Hongo, 7-chome Bunkyo-ku, Japan
Abstract :
Summary form only given. A fundamental understanding of the effects of gas-blasting on electron density distributions over extinguishing arc discharges is important for the development of highly reliable gas circuit breakers. High temporal and spatial resolutions and measurement accuracy makes Shack-Hartmann type laser wavefront sensors a practical choice of technology for measuring 2-dimensional electron density distributions over 3-mm-gap pulsed arc discharges with the peak current of 1250A in axial air-flow whose velocity ranged from 30 to 80m/s. The arc channel diameters for the air-flow velocity of 30 and 80m/s were narrower than those for no air-flow when an instantaneous current decreased to 14 and 35A, respectively. Moreover, no significant changes were observed in the values of the electron densities between with and without air-blasting.
Keywords :
Arc discharges; Current measurement; Density measurement; Gas lasers; Measurement by laser beam; Pulse measurements; Velocity measurement;
Conference_Titel :
Plasma Science (ICOPS), 2012 Abstracts IEEE International Conference on
Conference_Location :
Edinburgh
Print_ISBN :
978-1-4577-2127-4
Electronic_ISBN :
0730-9244
DOI :
10.1109/PLASMA.2012.6383429