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http://dx.doi.org/10.5757/JKVS.2009.18.3.186

Plasma Sources for Production of High Flux Particle Beams in Hyperthermal Energy Range  

Yoo, S.J. (Applications Plasma Research Team, National Fusion Research Institute)
Kim, S.B. (Applications Plasma Research Team, National Fusion Research Institute)
Publication Information
Journal of the Korean Vacuum Society / v.18, no.3, 2009 , pp. 186-196 More about this Journal
Abstract
Since it is difficult to extract a high flux ion beam directly at an energy of hyperthermal range ($1{\sim}100\;eV$), especially, lower than 50 eV, the ions should be neutralized into neutral particles and extracted as a neutral beam. A plasma source required to generate and efficiently transport high flux hyperthermal neutral beams should be easily scaled up and produce a high ion density (${\ge}10^{11}\;cm^{-3}$) even at a low working pressure (${\le}$ 0.3 mTorr). It is suggested that the required plasma source can be realized by Electron Cyclotron Resonance (ECR) plasmas with diverse magnetic field configurations of permanent magnets such as a planar ECR plasma source with magnetron field configuration and cylindrical one with axial magnetic fields produced by permanent magnet arrays around chamber wall. In both case of the ECR sources, the electron confinement is based on the simple mirror field structure and efficiently enhanced by electron drifts for producing the high density plasma even at the low pressure.
Keywords
Hyperthermal; Neutral beam; Plasma; ECR;
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