Simulations of beam excited minor species gyroharmonics in the Porcupine experiment

Details Simulations of beam excited minor species gyroharmonics in the Porcupine experiment Simulations of beam excited minor species gyroharmonics in the Porcupine experiment

Oct 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983jgr....88.8115r&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 88, Oct. 1, 1983, p. 8115-8122.

Computer Science

Sound

24

Gyrofrequency, Ion Beams, Plasma Interaction Experiment, Rocket Sounding, Space Plasmas, Computerized Simulation, Ionospheric Sounding, Oxygen Plasma, Plasma Guns, Power Spectra, Xenon

Scientific paper

An active experiment for the study of wave particle interaction in the presence of a perpendicular beam type distribution is considered. The experiment involves the injection of a beam perpendicular to the magnetic field. Beam parameters can then be varied while local plasma parameters and associated wave phenomena are measured. Such an experiment was conducted as part of the Porcupine project. The present investigation has the objective to explain theoretically and by means of plasma particle simulations, some of the wave observations obtained. In the experiment, a main rocket payload and four subpayloads were employed. The subpayloads were ejected radially in different directions at an altitude of 240 km. One of the spinning subpayloads contained a plasma gun which emitted a beam of 200 eV xenon ions toward the main payload. The data recorded on the main payload revealed the existence of electrostatic waves with peaks at hydrogen gyroharmonics. A series of computer simulations approximating the xenon experiment was performed. The interpretation of the data is discussed.

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