Physics – Plasma Physics
Scientific paper
Oct 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aps..dpprp1081s&link_type=abstract
American Physical Society, 43rd Annual Meeting of the APS Division of Plasma Physics October 29 - November 2, 2001 Long Beach, C
Physics
Plasma Physics
Scientific paper
Mass loading is the term commonly used in space physics to identify the contamination of the solar wind by different types of ions, their pickup, and their joint motion with the flow. There are two types of wave instabilities accompanying mass loading processes: ion cyclotron instability and modified two stream instability. Ion cyclotron instability leads to the excitation of Alfven waves, and usually develops in super-Alfvenic flows (e.g., upstream of the cometary bow shock). Modified two stream instability is dominant in sub-Alfvenic flows (e.g. inside the cometary bow shock or at the mantle region of non-magnetic planets) and results in the excitation of lower hybrid waves. Pitch angle diffusion and energization of ions caused by Alfven waves is analyzed using a quasilinear approximation together with particle trapping by waves, which occurs in the case of interaction with a monochromatic wave packet. Electron energization by the lower hybrid waves is also investigated as the mechanism responsible for the production of energetic electrons inside the cometary bow shock, and which may serve as the source for the generation of cometary X-ray emission.
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