Abstract
A criterion that must be satisfied by the positive-ion energy distribution at the edge of a sheath surrounding a negative probe is derived for the case when negative ions are present. This criterion is then used to derive the potential outside the sheath region surrounding a spherical probe immersed in an electro-negative plasma. It is found that the potential falls to low values when the ratio of negative ions to electrons exceeds 2. Under these circumstances the positive-ion current collected is the random current across the sheath edge. If, however, the ratio is much less than 2 then the collection of positive ions proceeds as for an electro-positive gas.
Reference11 articles.
1. The Collection of Positive Ions by a Probe Immersed in a Plasma
2. 3ohm D. 1949 Characteristics of electric discharges in magneticfields (ed. Guthrie &Wakerling). New York: McGraw-Hill Book Co.
3. Proc. Roy;Boyd R. L. F.;Soc. A,1950
4. Proc. Roy;Soyd R. L. F.;Soc. A,1959
5. Currents Limited by Space Charge between Coaxial Cylinders
Cited by
128 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献