Observations of electron beam structure in space experiments
| Autor: | Peter M. Banks, W. John Raitt |
|---|---|
| Rok vydání: | 1988 |
| Předmět: |
Physics
Atmospheric Science Beam diameter Ecology business.industry Gyroradius Paleontology Soil Science Forestry Electron Aquatic Science Oceanography Electromagnetic radiation Magnetic field Geophysics Optics Space and Planetary Science Geochemistry and Petrology Earth and Planetary Sciences (miscellaneous) Vacuum chamber Pitch angle business Beam (structure) Earth-Surface Processes Water Science and Technology |
| Zdroj: | Journal of Geophysical Research. 93:5811 |
| ISSN: | 0148-0227 |
| DOI: | 10.1029/ja093ia06p05811 |
| Popis: | Observations of a 100-mA, 1-keV electron beam were made with a low light level TV system and other instruments aboard the space shuttle STS 3 in March 1982. When fired at a moderate pitch angle with respect to the magnetic field, the beam electrons initially moved outward along a classical helical trajectory. Within a short distance, however, the beam electrons were deflected away from the helical trajectory into paths parallel to magnetic field lines threading the primary helix. This resulted in the formation of a thin-walled, cylindrical electron beam structure having a radius equal to the primary beam gyroradius. This structure, which is consistent with earlier laboratory vacuum chamber observations and recent two-dimensional computer electrostatic plasma simulations, has important implications for determining the extent to which pulsed electron beams can radiate electromagnetic energy in the ionosphere. |
| Databáze: | OpenAIRE |
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