J de Urquijo et al 1999 J. Phys. D: Appl. Phys. 32 41 doi:10.1088/0022-3727/32/1/008
A time-resolved study of ionization, electron attachment and positive-ion drift in methane
J de Urquijo, C A Arriaga, C Cisneros and I Alvarez
Show affiliationsA pulsed Townsend swarm technique has been used to study electron-ionization and electron-attachment processes in methane over the density-normalized electrical field strength, 
, in the range 1.2-30 fV 
(120-3000 Td). The time-resolved ionic avalanches were obtained under conditions such that the occurrence of electron-attachment processes was detected unambiguously. The analysis of these avalanche pulses resulted in values of the effective ionization coefficients and positive-ion mobilities over the above range. To the best of our knowledge, no values of positive-ion mobilities had been published before for 
Td. The electron-attachment effects were observed up to 
Td.
- PACS
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51.10.+y Kinetic and transport theory of gases
34.80.Lx Recombination, attachment, and positronium formation
51.50.+v Electrical properties (ionization, breakdown, electron and ion mobility, etc.)
- Subjects
- Dates
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Issue 1 (7 January 1999)
Received 4 June 1998, in final form 21 September 1998
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A time-resolved study of ionization, electron attachment and positive-ion drift in methane
J de Urquijo et al 1999 J. Phys. D: Appl. Phys. 32 41
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