Ion beam acceleration in a divergent magnetic field
- 12 May 2008
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 92 (19)
- https://doi.org/10.1063/1.2927478
Abstract
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 similar to 2.9c(s) was obtained for a source/expansion magnetic field ratio of 43. (C) 2008 American Institute of Physics.Keywords
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