Enhanced production of electron cyclotron resonance plasma by exciting selective microwave mode on a large-bore electron cyclotron resonance ion source with permanent magnet

We are constructing a tandem type ECRIS. The first stage is large-bore with cylindrically comb-shaped magnet. We optimize the ion beam current and ion saturation current by a mobile plate tuner. They change by the position of the plate tuner for 2.45 GHz, 11-13 GHz, and multi-frequencies. The peak p...

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Bibliographic Details
Published in:Review of scientific instruments 2014-02, Vol.85 (2), p.02A938-02A938
Main Authors: Kimura, Daiju, Kurisu, Yosuke, Nozaki, Dai, Yano, Keisuke, Imai, Youta, Kumakura, Sho, Sato, Fuminobu, Kato, Yushi, Iida, Toshiyuki
Format: Article
Language:English
Subjects:
BEAM CURRENTS
CYLINDRICAL CONFIGURATION
ECR ION SOURCES
ELECTRON CYCLOTRON-RESONANCE
EXCITATION
GHZ RANGE
MICROWAVE RADIATION
PARTICLE ACCELERATORS
PERMANENT MAGNETS
PLASMA
PLATES
STANDING WAVES
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Summary:We are constructing a tandem type ECRIS. The first stage is large-bore with cylindrically comb-shaped magnet. We optimize the ion beam current and ion saturation current by a mobile plate tuner. They change by the position of the plate tuner for 2.45 GHz, 11-13 GHz, and multi-frequencies. The peak positions of them are close to the position where the microwave mode forms standing wave between the plate tuner and the extractor. The absorbed powers are estimated for each mode. We show a new guiding principle, which the number of efficient microwave mode should be selected to fit to that of multipole of the comb-shaped magnets. We obtained the excitation of the selective modes using new mobile plate tuner to enhance ECR efficiency.
ISSN:0034-6748
1089-7623
DOI:10.1063/1.4832068