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Large-area multiarc ion beam source “MAIS”

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3 Author(s)
Engelko, V. ; Inst. fur Neutronenphys. und Reaktortech., Forschungszentrum Karlsruhe, Germany ; Giese, H. ; Schalk, S.

A pulsed large-area intense ion beam source is described in which the ion-emitting plasma is built up by an array of individual discharge units homogeneously distributed over the surface of a common discharge electrode. A particularly advantageous feature of the source is that for plasma generation and subsequent acceleration of the ions, only one common energy supply is necessary. This allows us to simplify the source design and provides inherent synchronization of plasma production and ion extraction. Results of investigations of the source performance for the production of a proton beam are presented. The maximum beam current achieved to date is on the order of 100 A, with a particle kinetic energy of 15-30 keV and a pulse length in the range of 10 μs. Originally conceived for the production of proton beams, the source has recently been modified to allow the production of a metal ion beam. First tests using tungsten ions delivered encouraging results. Future activities will concentrate on the use of alternative-metal ions, carbon ions, and beams composed of mixed ion species

Published in:

Plasma Science, IEEE Transactions on  (Volume:25 ,  Issue: 4 )