E Castaños-Martínez et al 2009 J. Phys. D: Appl. Phys. 42 012003 doi:10.1088/0022-3727/42/1/012003
Achieving non-contracted and non-filamentary rare-gas tubular discharges at atmospheric pressure
FREE ARTICLEE Castaños-Martínez, M Moisan1 and Y Kabouzi
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At gas pressures >1 kPa, tubular rare-gas electrical discharges can contract radially yielding a single axially centred bright filament. When sustaining the discharge with microwave fields of a high enough frequency, instead of a single filament, two or more smaller-diameter and off-centre plasma filaments can be formed. When a specific percentage (<1%) of a rare gas having a lower ionization potential is added to a pure rare-gas atmospheric-pressure discharge, the single-filament contracted discharge fully expands radially or the initially multi-filament discharge becomes homogeneous. Experimental characteristics of this phenomenon and the required operating conditions are reported here for the first time.
- PACS
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52.80.Pi High-frequency and RF discharges
52.20.Hv Atomic, molecular, ion, and heavy-particle collisions
- Subjects
- Dates
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Issue 1 (7 January 2009)
Received 10 September 2008, in final form 4 November 2008
Published 12 December 2008
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Achieving non-contracted and non-filamentary rare-gas tubular discharges at atmospheric pressure
E Castaños-Martínez et al 2009 J. Phys. D: Appl. Phys. 42 012003
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