Physics – Plasma Physics
Scientific paper
Jun 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007jgra..11206231g&link_type=abstract
Journal of Geophysical Research, Volume 112, Issue A6, CiteID A06231
Physics
Plasma Physics
6
Space Plasma Physics: Kinetic Waves And Instabilities, Magnetospheric Physics: Radiation Belts, Magnetospheric Physics: Plasma Waves And Instabilities (2471), Space Plasma Physics: Nonlinear Phenomena (4400, 6944), Space Plasma Physics: Turbulence (4490)
Scientific paper
It is shown that intense ion cyclotron turbulence can be induced in the near-Earth space by shaped release of neutral gas of materials such as lithium, cesium, etc. Release of 1 ton of neutral lithium gas in the Earth's equatorial plane at L = 2 can introduce about 30 GJ of energy which can be used to excite waves around the lithium ion cyclotron harmonics that readily evolves into the turbulent state. The energy is obtained by converting the orbital kinetic energy of the neutral lithium atoms into free energy for the electromagnetic waves through photoionization and creation of a ring distribution in the lithium ion velocity perpendicular to the ambient magnetic field. This distribution function is highly unstable and can spontaneously trigger large amplitude shear Alfven waves near lithium cyclotron harmonics with unique nonlinear properties. These waves lead to pitch angle scattering of the trapped electrons in a broad energy band.
Ganguli Gurudas
Mithaiwala Manish
Papadopoulos Konstantinos
Rudakov Leonid
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