Ambipolar diffusion in direct-current positive column with variations in radius of discharge tube

Akbar D., Bilikmen S.

CHINESE PHYSICS LETTERS, vol.23, no.9, pp.2498-2501, 2006 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 23 Issue: 9
  • Publication Date: 2006
  • Doi Number: 10.1088/0256-307x/23/9/041
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.2498-2501
  • Middle East Technical University Affiliated: No


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.