Ion beam acceleration in a divergent magnetic field

Journal Article · Mon May 12 04:00:00 EDT 2008 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.2927478· OSTI ID:21102048

Biloiu, Ioana A; Scime, Earl E ^[1]; Biloiu, Costel ^[2]

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1. West Virginia University, Physics Department, Morgantown, West Virginia 26506 (United States)
2. Varian Semiconductor Equipment Associates, 35 Dory Road, Gloucester, Massachusetts 01930 (United States)

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 {approx}2.9c{sub s} was obtained for a source/expansion magnetic field ratio of 43.

• OSTI ID: 21102048
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 19 Vol. 92; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ACCELERATION
ARGON IONS
BEAM-PLASMA SYSTEMS
DISTRIBUTION FUNCTIONS
FLUORESCENCE
ION BEAMS
LASERS
MAGNETIC FIELDS
PLASMA
TOMOGRAPHY
TWO-DIMENSIONAL CALCULATIONS