New Mechanism for Electromagnetic Emission near the Geometric Mean Plasma Frequency
- 6 August 1979
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 43 (6) , 445-449
- https://doi.org/10.1103/physrevlett.43.445
Abstract
We report the experimental observation and theoretical description of a previously unrecognized mechanism for electromagnetic emission from plasmas near the geometric mean plasma frequency. Very clear emissions were observed from the electric-field-dominated NASA Lewis bumpy torus plasma at a frequency which is inconsistent with familiar mechanisms of plasma emission. A theory based on a Penning-discharge-like beam-plasma interaction predicts a frequency in excellent agreement with the observations.Keywords
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