NOISE AND CORRELATION STUDIES OF MICROWAVE RESONANCES OF A PLASMA COLUMN IN A MAGNETIC FIELD.
Abstract
Recent observations of strong resonances at the harmonics of the electron cyclotron frequency in the noise emission from low temperature plasmas have raised the question of whether the harmonics were being generated in the volume of the plasma or in the sheath. Conclusive evidence is presented that the observed harmonic effects can be explained satisfactorily in terms of electrostatic oscillations in the plasma volume, and that they cannot be explained in terms of effects in the sheath. Good agreement with the calculated dispersion relation for the electrostatic oscillations was obtained in noise measurements. Transmission parallel to the magnetic field and plasma column was observed. The noise signals generated by heating the column in the fundamental and second harmonic modes were observed to propagate along the magnetic field and plasma column. Observations of noise emission, wave propagation, and resonances in modes other than the cyclotron harmonic modes are also presented. A theoretical discussion of the two-frequency correlation experiment and a further exploration of its experimental properties are given. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1964
- Accession Number
- AD0615553
Entities
People
- G. N. Oetzel
Organizations
- Stanford University