Ion beam acceleration in a divergent magnetic field | Zendy

Ioana A. Biloiu | Zendy; Earl Scime | Zendy; Costel Biloiu | Zendy

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Ion beam acceleration in a divergent magnetic field

Author(s) -

Ioana A. Biloiu,

Earl Scime,

Costel Biloiu

Publication year - 2008

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 442

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.2927478

Subject(s) - magnetic field , supersonic speed , axial symmetry , atomic physics , ion , plasma , population , ion beam , isotropy , physics , materials science , beam (structure) , optics , mechanics , nuclear physics , demography , quantum mechanics , sociology

Two-dimensional argon ion velocity distribution functions (IVDFs) in the expansion region of a helicon plasma source have been measured by laser-induced-fluorescence tomography. Below a threshold value of the magnetic field in the expansion region, the IVDFs show a bimodal structure comprised of a supersonic ion population axially moving away from the source and an isotropic, slow, background, ion population. Increasing the magnetic field divergence leads to an increase in the axial speed of the supersonic component. A maximum axial speed of ∼2.9cs was obtained for a source/expansion magnetic field ratio of 43.

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