Volume 74, Number 3, May 2006
|Page(s)||431 - 437|
|Section||Physics of gases, plasmas and electric discharges|
|Published online||22 March 2006|
Why does a low-pressure wire-discharge exist self-sustained?
SOPRA SA - 26 rue Pierre Joigneaux, 92270 Bois-Colombes, France
2 LPGP, Université Paris XI - 91405 Orsay, France
3 IHCE - 4 ave. Akademicheski, 650055, Tomsk, Russia
Corresponding author: firstname.lastname@example.org
Accepted: 28 February 2006
Numerical study of a self-sustained low-pressure (6.8 or 50) wire discharge in helium is reported. The current-independent voltage drop across the cathode sheath is found to be of ~250. The other part of the discharge voltage is essentially applied across the anode sheath. It drains electrons from the quasi-neutral plasma and thus presents a necessary condition for discharge maintenance. Two major groups of electrons have been distinguished: the fast electrons of ~(24–250), as well as a very small fraction of hot (run-away) electrons with the energy close to the discharge voltage, are responsible for gas ionization throughout negative glow while the thermalized electrons of ~1's eV are easily captured by the anode and so removed from the discharge.
PACS: 52.80.Hc – Glow; corona / 52.65.Pp – Monte Carlo methods / 52.65.Rr – Particle-in-cell method
© EDP Sciences, 2006
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.