Experimental study of microwave generation and suppression in a non-neutral e-layer
Abstract
Broadband microwave radiation in the X and KA bands was observed from a non-neutral electron layer prepared by passing a 2.5-MeV straight hollow electron beam through a narrow magnetic cusp. The mean beam radius shrank from 6 to 4.5 cm and the beam radial width increased from less than 1 to 2.7 cm in the postcusp e-layer drift region. When the beam was passed through a thin scattering foil prior to cusp transmission, the observed radiation decreased by two orders of magnitude and the beam width and radius remained at values consistent with single-particle calculations. Results are discussed in terms of the negative-mass instability.
- Publication:
-
Journal of Applied Physics
- Pub Date:
- August 1977
- DOI:
- 10.1063/1.324210
- Bibcode:
- 1977JAP....48.3291D
- Keywords:
-
- Electron Accelerators;
- Electron Radiation;
- Magnetic Effects;
- Magnetohydrodynamic Stability;
- Microwave Emission;
- Electron Beams;
- Electron Distribution;
- Extremely High Frequencies;
- High Energy Electrons;
- Line Spectra;
- Magnetic Fields;
- Power Spectra;
- Superhigh Frequencies;
- Nuclear and High-Energy Physics;
- 52.35.Py;
- 52.55.Ke;
- 41.70.+t;
- 29.15.Dt;
- Macroinstabilities