Thermalization of neutral-beam-injected ions by lower hybrid waves in Jupiter's magnetosphere

Details Thermalization of neutral-beam-injected ions by lower hybrid waves in Jupiter's magnetosphere Thermalization of neutral-beam-injected ions by lower hybrid waves in Jupiter's magnetosphere

Mar 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985phrvl..54.1160b&link_type=abstract

Physical Review Letters (ISSN 0031-9007), vol. 54, March 18, 1985, p. 1160-1162.

Physics

6

Ion Injection, Jupiter Atmosphere, Magnetospheric Instability, Neutral Beams, Planetary Magnetospheres, Plasma Waves, Ion Distribution, Ion Temperature, Thermalization (Energy Absorption), Toroidal Plasmas

Scientific paper

A theoretical analysis of lower-hybrid wave generation by a ring distribution of superthermal ions is presented. A kinetic instability of waves traveling across the magnetic field occurs when fast neutrals escaping from the Io plasma torus are reionized and accelerated to corotation speed in Jupiter's magnetosphere. Instability is possible for modest threshold values of V/a0 = 3 - 7 where V is the pickup gyrospeed and a0 is the background-ion thermal speed. Consequent effects include the relaxation of the pickup-ion distribution and the acceleration of superthermal electrons.

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