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Space-charge lens for focusing a negative-ion beam

  • Plasma Optics
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Abstract

Results are presented from experimental and theoretical studies of a space-charge lens for focusing a negative-ion beam. The space-charge field and the beam ion trajectories are numerically calculated for the lens used in the experiments. The results of calculations are compared with the experimental data. It is shown theoretically and experimentally that the proposed device allows one to achieve the main operating conditions of the space-charge lens: the inertial confinement of positive ions and the removal of electrons by an external electric field. The focusing field of the lens attains ∼100 V/cm, which provides a focal length of <20 cm.

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Authors and Affiliations

  1. Institute of Physics, National Academy of Sciences of Ukraine, pr. Nauki 144, Kiev, 03039, Ukraine

    A. M. Zavalov, V. N. Gorshkov, V. P. Goretskii & I. A. Soloshenko

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  1. A. M. Zavalov
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  2. V. N. Gorshkov
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  3. V. P. Goretskii
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  4. I. A. Soloshenko
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__________

Translated from Fizika Plazmy, Vol. 29, No. 6, 2003, pp. 516–520.

Original Russian Text Copyright © 2003 by Zavalov, Gorshkov, Goretski\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l} \), Soloshenko.

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Zavalov, A.M., Gorshkov, V.N., Goretskii, V.P. et al. Space-charge lens for focusing a negative-ion beam. Plasma Phys. Rep. 29, 480–484 (2003). https://doi.org/10.1134/1.1582515

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  • DOI: https://doi.org/10.1134/1.1582515

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