Integral cross section measurements of ion excitation by electron impact

Details Integral cross section measurements of ion excitation by electron impact Integral cross section measurements of ion excitation by electron impact

Oct 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997aps..gecjtp105g&link_type=abstract

American Physical Society, Gaseous Electronics Conference, October 5-9, 1997, abstract #JTP.105

Physics

Scientific paper

Ion excitation by electron impact is a source of line emission in solar, planetary, stellar and fusion plasmas. Observations of these transitions can be used to determine plasma characteristics if reliable total cross sections are available. The JPL experiment utilizes a merged-beams approach to collide the electrons and ions. A uniform magnetic field along the merged-beams axis confines all the inelastically-scattered electrons. These are then trochoidally separated from the main beams, enabling total absolute cross sections to be measured [1]. We have recently installed an Electron Cylotron Resonance(ECR) ion source which has enabled us to study multiply charged ions (MCIs). First ECR results for MCIs will be presented, along with excitation data on S II and Ar II. [1] S. J. Smith et al., Ap. J. 463, 808 (1996).

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