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Perpendicular Propagation Velocity of a Townsend Discharge in Crossed DC Uniform Electric and Magnetic Fields

By using a pulsed ultraviolet light source, the propagation velocity, in the range 0.19-8.15 x 104 m s-1, of a Townsend discharge has been measured oscilloscopically as it travels perpendicularly to the applied crossed DC uniform electric and magnetic field in ethane gas near the Paschen minimum alo...

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Published in:	Proceedings of the Royal Society of London. Series A, Mathematical and physical sciences Mathematical and physical sciences, 1986-08, Vol.406 (1831), p.345-362
Main Authors:	Watts, M. P., Heylen, A. E. D.
Format:	Article
Language:	English
Subjects:	Avalanches Cathodes Cations Electric discharges Electric fields Electrons Exact sciences and technology Fall lines Gas pressure Magnetic fields Phase velocity Photons Physics Physics of gases, plasmas and electric discharges Physics of plasmas and electric discharges
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container_title	Proceedings of the Royal Society of London. Series A, Mathematical and physical sciences
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creator	Watts, M. P. Heylen, A. E. D.
description	By using a pulsed ultraviolet light source, the propagation velocity, in the range 0.19-8.15 x 104 m s-1, of a Townsend discharge has been measured oscilloscopically as it travels perpendicularly to the applied crossed DC uniform electric and magnetic field in ethane gas near the Paschen minimum along ski-shaped electrodes having suitably placed monitoring probes in the cathode. Fundamental measurements of the electron avalanche deflection angle and the positive ion drift velocity allow the calculated continuous and stepped propagation velocity to be compared with the measured one, by using an earlier simplified model and a more developed one; agreement is good. This opens up new areas for study of Townsend discharges and a successful correlation with magnetic arc movement is reported.
doi_str_mv	10.1098/rspa.1986.0079
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source	JSTOR Archival Journals and Primary Sources Collection; Royal Society Publishing Jisc Collections Royal Society Journals Read & Publish Transitional Agreement 2025 (reading list)
subjects	Avalanches Cathodes Cations Electric discharges Electric fields Electrons Exact sciences and technology Fall lines Gas pressure Magnetic fields Phase velocity Photons Physics Physics of gases, plasmas and electric discharges Physics of plasmas and electric discharges
title	Perpendicular Propagation Velocity of a Townsend Discharge in Crossed DC Uniform Electric and Magnetic Fields
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