Measurements of the stability of energetic electron beams in the ionosphere

Details Measurements of the stability of energetic electron beams in the ionosphere Measurements of the stability of energetic electron beams in the ionosphere

Apr 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983jgr....88.3095d&link_type=abstract

Journal of Geophysical Research, vol. 88, Apr. 1, 1983, p. 3095-3108.

Computer Science

Sound

15

Auroral Arcs, Beam Injection, Ionospheric Sounding, Magnetohydrodynamic Stability, Relativistic Electron Beams, Rocket Sounding, Charged Particles, Data Simulation, Electron Guns, High Energy Electrons, Perturbation Theory, Plasma Diagnostics, Spatial Distribution

Scientific paper

An electron gun carried in the main payload of a rocket launched on December 3, 1979 into a bright, east-west oriented auroral arc produced a pulsed electron beam in a programed format. Charged particle observations from the flight are used to define the spatial distribution of perturbed volume surrounding the accelerator during gun firing, determining that perturbation radial dimensions scale with the primary electron beam gyroradius and current and are dependent on beam injection angle. The intense flux of low energy electrons observed on field lines near the rocket are shown to be accelerated ambients, while particles at or near the beam energy and at large radial distances are presumably beam primaries. Results from this flight are compared with those from large vacuum tank simulations, and it is concluded that certain features of the data are consistent with the beam-plasma instability observed in the laboratory.

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