Drift motions of the radiation belt particles

Drift motions of the radiation belt particles - Drift...

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Unformatted text preview: Drift motions of the radiation belt particles Besides the "bounce" motion of the radiation belt particles they also drift due to various mechanisms: Electric fields cause a drift perpendicular to both E and B , that is: v = ( E x B )/B 2 radial Decrease of B : Curvature of the field lines: This gives a westward drift for protons and an eastward drift for electronsan eastward drift for electrons Interaction of the solar wind with bodies with no magnetic field: We can divide this into two types of interaction, depending on whether or not the body encountered has an atmosphere: i. No field, no atmosphere Here we get the interaction we mentioned above: that is, the solar wind particles just encounter the surface off the body and are absorbed or "bounce off". If the body is at all conductive, it "shorts out" the fields. Some particles diffuse around it and so the total particle "shadow" just anti-sunward of the body will be surrounded by a penumbra, and the "wake" will be gradually...
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This note was uploaded on 12/15/2011 for the course AST AST1002 taught by Professor Emilyhoward during the Fall '10 term at Broward College.

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Drift motions of the radiation belt particles - Drift...

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