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For the purpose of neutral-lithium beam tokamak–plasma diagnostics we have developed a compact, high current (several tens of mA/cm2) 2.45-GHz electron cyclotron resonance (ECR) Li+ plasma ion source in coaxial geometry, coupled to a helium-buffered lithium feeding system working according to the heat pipe principle. The accel–decel-type ion extraction system features either seven holes or one single aperture. First experimental results for the extractable Li+ and He+ ions in both cw and pulsed-mode operations are presented.
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Wutte et al. (1994) studied this question.
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