Abstract
Transport coefficients defined as quantities to understand quantitative characteristics of swarm behaviors of charged particles have often been used for any weakly ionized gas medium as clear concepts. However, when positive ions are generated only by elecctrons for example, the positive ion swarm is influenced by the electron swarm. Therefore, transport coefficients for the positive ions should be distinguished from those obtained theoretically and experimentally only in some fundamental process of the positive ion swarm. This means that suitable expressions of the transport coefficients are given for a balanced mechanism between the generation and the loss of charged particles to maintain the steady state of the media. In the present paper, the mobility and diffusion coefficient are treated especially for positive ions under the abovepoint of view. In addition, the problem in the cylindrical positive column of a glow discharge is discussed as an example.
