OBSERVATIONS OF A RESONANCE PROBE EFFECT NEAR THE ION PLASMA FREQUENCY.
Abstract
The ion resonance effect, a phenomenon in which the rectified current to an ac-driven, positively biased Langmuir probe exhibits a peak near the ion plasma frequency, is investigated experimentally and theoretically. The dependence of the resonance upon ion density and sheath thickness is determined, and evidence is presented that the sharpness of the resonance increases with increasing plasma density. The plasma was obtained by diffusion from the positive column of a low-pressure (10 to 50 microns Hg), hollow cathode discharge in argon and had densities ranging between ten to the 8th power ions per cubic cm-3 and an electron temperature of 0.5 eV. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1966
- Accession Number
- AD0803034
Entities
People
- Alan J. Toepfer
- G. G. Comisar
Organizations
- The Aerospace Corporation