Abstract
Major patterns of ion beam transport in a system with ballistic focusing are studied via numerical modeling. It is shown that the efficiency of transporting a beam of metal ions at 0.66 A and an ion energy of 1–3 keV depends on the voltage bias and plasma density in the beam’s drift space. Incomplete compensation for high-speed ions in the beam transport channel lowers the potential and (under certain conditions) produces a virtual anode. The ion-electron emission of electrons from targets and grid electrodes is an additional mechanism of compensating for the spatial charge of a beam of metal ions.
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This work was supported by the Russian Science Foundation, grant no. 17-19-01169.
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Translated by I. Moshkin
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Koval, T.V., An, T.M. & Tarakanov, V.P. Modeling Transport in a System with Ballistic Focusing of a High Intensity Beam of Metal Ions. Bull. Russ. Acad. Sci. Phys. 83, 1387–1391 (2019). https://doi.org/10.3103/S1062873819110145
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DOI: https://doi.org/10.3103/S1062873819110145