On the origin of inner-source pickup ions

Details On the origin of inner-source pickup ions On the origin of inner-source pickup ions

Jan 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003georl..30b..49w&link_type=abstract

Geophysical Research Letters, Volume 30, Issue 2, pp. 49-1, CiteID 1077, DOI 10.1029/2002GL015218

Physics

7

Interplanetary Physics: Pickup Ions, Planetology: Comets And Small Bodies: Interactions With Solar Wind Plasma And Fields, Planetology: Comets And Small Bodies: Dust

Scientific paper

In situ measurements of pickup ions (PUI) exhibit a component that has nearly thermalized with the solar wind. This implies an origin close to the Sun and is generally ascribed to interaction of the solar wind with interplanetary dust particles (IDPs). We propose a scenario for the origin of inner-source PUIs in which a population of very small IDPs serves as the neutralizing agent for solar wind ions. The size of these IDPs is less than or comparable to the penetration range, of solar wind ions in IDP material. The interaction of the solar wind with such particles results in a net charge exchange in which solar wind ions exit the IDPs as predominantly neutral or singly-charged ions. When the neutralized solar wind is reionized, it is picked up and can then be measured as a PUI.

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