Elefantenbegriffe

Benedictis, Angela De

doi:10.12946/rg01/244-246

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2003

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“…This is a consequence of the large characteristic times for electron ambipolar diffusion, as was pointed out in [18], and it is in agreement with the measurements done in [34], where the variation of the effective diffusion coefficient was derived from breakdown time delay data. Very recently this effect was also detected in a corona discharge [35].…”

Section: Resultsmentioning

confidence: 68%

Electron and metastable kinetics in the nitrogen afterglow

Guerra¹,

Sá

Loureiro³

2003

Plasma Sources Sci. Technol.

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This work presents a theoretical study of the time-relaxation of both the electron energy distribution function and the populations of the different species of interest in the nitrogen afterglow of a ω/2π = 433 MHz discharge at p = 3.3 Torr, in a tube with radius R = 1.9 cm. It is shown that collisions of highly excited N 2 (X 1 + g , v 35) molecules with N(4 S) atoms may be in the origin of the observed pronounced maxima for the concentrations of various species, including electrons, occurring downstream from the discharge after a dark zone. Slow electrons remain for very long times in the post-discharge (at least up to t ∼ 10 −3-10 −2 s), and the strong coupling between the electron and metastable kinetics is clearly pointed out.

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Section: Resultsmentioning

confidence: 68%