Comparison between single- and dual-electrode ion source systems for low-energy ion transport

Extraction of ions with energies below 100 eV has been demonstrated using a hot-cathode multi-cusp ion source equipped with extraction electrodes made of thin wires. Two electrode geometries, a single-electrode system, and a dual-electrode system were built and tested. The single-electrode configura...

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Bibliographic Details
Main Authors: Vasquez, M. Jr, Tokumura, S., Kasuya, T., Maeno, S., Wada, M., Graduate School of Science and Engineering, Doshisha University, Kyotanabe, Kyoto 610-321, Novelion Systems Co.Ltd., D-Egg, Kyotanabe, Kyoto 610-332
Format: Conference Proceeding
Language:English
Subjects:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ATTENUATION
BEAM EMITTANCE
BEAM EXTRACTION
BEAM PRODUCTION
BEAM PROFILES
BEAM TRANSPORT
CATHODES
COMPARATIVE EVALUATIONS
CURRENT DENSITY
ENERGY SPECTRA
ION BEAMS
ION SOURCES
PARTICLE ACCELERATORS
PARTICLE BEAMS
PLASMA
PLASMA DENSITY
POTENTIALS
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Summary:Extraction of ions with energies below 100 eV has been demonstrated using a hot-cathode multi-cusp ion source equipped with extraction electrodes made of thin wires. Two electrode geometries, a single-electrode system, and a dual-electrode system were built and tested. The single-electrode configuration showed high ion beam current densities at shorter distances from the electrode but exhibited rapid attenuation as the distance from the electrode increased. Beam angular spread measurements showed similar beam divergence for both electrode configurations at low plasma densities. At high plasma densities and low extraction potentials, the single-electrode system showed the angular spread twice as large as that of the dual-electrode system. Energy distribution analyses showed a broader energy spread for ion beams extracted from a single-electrode set-up.
ISSN:0094-243X
1551-7616
DOI:10.1063/1.4766574