Ion resonances and ELF wave production by an electron beam injected into the ionosphere: Echo 6
| Autor: | J. E. Steffen, John R. Winckler, R. L. Swanson, Y. Abe, K. N. Erickson, P. R. Malcolm |
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| Rok vydání: | 1984 |
| Předmět: |
Physics
Atmospheric Science Ecology Paleontology Soil Science Resonance Forestry Plasma Electron Aquatic Science Oceanography Signal Magnetic field Geophysics Space and Planetary Science Geochemistry and Petrology Physics::Space Physics Earth and Planetary Sciences (miscellaneous) Cathode ray Physics::Accelerator Physics Atomic physics Ionosphere Beam (structure) Earth-Surface Processes Water Science and Technology |
| Zdroj: | Journal of Geophysical Research: Space Physics. 89:7565-7571 |
| ISSN: | 0148-0227 |
| DOI: | 10.1029/ja089ia09p07565 |
| Popis: | Two effects observed with electron antennas ejected from a sounding rocket launched into the ionosphere in March 1983 carrying electron beam guns are discussed. The sensor packages were ejected and travelled parallel to the vehicle trajectory. Electric potentials were measured between the single probes and a plasma diagnostic package while the gun injected electrons into the ionosphere in perpendicular and parallel 1 kHz directions. Signal pulses over the dc-1250 kHz range were detected. A kHz gun frequency caused a signal that decreased by two orders of magnitude between 45-90 m from the beam field line. However, the signal was detectable at 1 mV/m at 120 m, supporting earlier data that indicated that pulsed electron beams can cause ELF waves in space. Beam injection parallel to the magnetic field produced an 840 Hz resonance that could be quenched by activation of a transverse beam. |
| Databáze: | OpenAIRE |
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