Ambipolar diffusion in direct-current positive column with variations in radius of discharge tube
CHINESE PHYSICS LETTERS, vol.23, no.9, pp.2498-2501, 2006 (SCI-Expanded, Scopus)
- Publication Type: Article / Article
- Volume: 23 Issue: 9
- Publication Date: 2006
- Doi Number: 10.1088/0256-307x/23/9/041
- Journal Name: CHINESE PHYSICS LETTERS
- Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Page Numbers: pp.2498-2501
- Middle East Technical University Affiliated: No
Abstract
The ambipolar diffusion and argon ion mobility as functions of the reduced electric field and pressure times the tube radius are investigated in a weakly ionized non-uniform glow discharge plasma system. In particular, the variable cross section at the same discharge tube on the ambipolar diffusion coefficient shows a more noticeable effect than the effects from the ion mobility. As the diffusion length Lambda increases, the ambipolar diffusion D-a increases. However, it decreases as the discharge current is increased.