Physics
Scientific paper
Jan 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991angeo...9...37b&link_type=abstract
Annales Geophysicae (ISSN 0939-4176), vol. 9, Jan. 1991, p. 37-41. Research supported by NFR.
Physics
Electric Field Strength, Ion Temperature, Magnetospheric Ion Density, Plasma Turbulence, Gyrofrequency, Low Turbulence
Scientific paper
A theory of ion heating in an ad hoc 'weakly turbulent' plasma model is discussed. At first sight it seems as if this heating mechanism, which has been called 'nonresonant', may provide an explanation of the apparent correlation between satellite observations in the earth's magnetosphere of electric field fluctuations at frequencies well below the ion gyrofrequency and the presence of heated ions. However, it is shown that, in this theory of ion heating, only that part of the observed spectral density which can resonate with the ions produces ion heating. It is concluded that this mechanism cannot provide the inferred causal link between spectral densities well below the ion gyrofrequency and observations of ion conics.
André Mats
Ball Lewis
Johnson Jay Robert
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