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Positive-Space-Charge Lens for Focusing and Manipulating High-Current Beams of Negatively Charged Particles

We describe a new approach for the creation of effective axially symmetric plasma tools for focusing and manipulating high-current negatively charged particle beams, negative ions, and electrons. This approach is based on the fundamental plasma-optical concept of magnetic and electrostatic insulatio...

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Bibliographic Details
Published in:IEEE transactions on plasma science 2011-06, Vol.39 (6), p.1408-1411
Main Authors: Dobrovolsky, A M, Dunets, S P, Evsyukov, A N, Goncharov, A A, Gushenets, V I, Litovko, I V, Oks, E M
Format: Article
Language:English
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Summary:We describe a new approach for the creation of effective axially symmetric plasma tools for focusing and manipulating high-current negatively charged particle beams, negative ions, and electrons. This approach is based on the fundamental plasma-optical concept of magnetic and electrostatic insulation of electrons and nonmagnetized positive ions providing controlled uncompensated positive-space-charge cloud formation. The recent advances in the creation of negative ion sources have led to the problem of elaboration and creation of focusing tools capable of manipulating high-current negative ion beams. We describe novel experimental, theoretical, and computer simulation results of the application of the magnetic electron insulation concept for the creation of the positive-space-charge electrostatic plasma lens. The described results open up an attractive possibility to use this lens for focusing high-current negative ion beams.
ISSN:0093-3813
1939-9375
DOI:10.1109/TPS.2011.2109015