Computer Science – Sound
Scientific paper
Jan 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978jgr....83...16c&link_type=abstract
Journal of Geophysical Research, vol. 83, Jan. 1, 1978, p. 16-24.
Computer Science
Sound
3
Electron Beams, Electron Energy, Ionospheric Heating, Rocket Sounding, Atmospheric Density, Black Brant Sounding Rockets, Electron Guns, Electrostatic Probes, Ionospheric Electron Density, Plasma Density, Plasma Heating
Scientific paper
An electrostatic analyzer on the electron accelerator of the Electron Echo 2 experiment showed that the electrons of the background plasma were heated to 10,000 K or more within 8 ms of the start of gun pulses. The degree of heating was dependent on the orientation of the rocket with respect to the magnetic field but was not measurably dependent on ambient electron density, neutral atmosphere density, or on the pitch angle at which the 40-keV electron beam was injected. This heating was also accompanied by an increase of plasma density. No evidence was found for an ion-free region around the rocket during gun pulses. These observations show that significant amounts of ionization are taking place around the rocket. During part of the flight a two-temperature electron distribution was found. It is believed that the high-temperature part of these distributions represents secondaries produced by the beam.
Cartwright D. G.
Kellogg Paul J.
Monson Steven J.
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