Abstract
An injector of hydrogen atoms for plasma diagnostics in modern tokamaks has been developed at the Budker Institute of Nuclear Physics (Novosibirsk). The ion source of the injector produces a proton (helium ion) beam with a current of up to 2 A (1 A), an ion energy of up to 55 keV, a beam divergence of ∼0.6\deg, and a pulse duration of up to 10 s. An RF discharge-based plasma emitter, which is one of the main parts of the ion source, is described. The emitter diameter is 72 mm, the ion current density is 120 mA/cm2, and the inhomogeneity of the current density is ±6%. The beam is formed by a four-electrode ionoptical system with 163 round apertures. At a current of 2 A, the ion beam consists of 67% protons, 18% H +2 ions, and 15% H +3 ions, the total content of heavier ions in the beam being no higher than 2–3%.
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Translated from Fizika Plazmy, Vol. 28, No. 3, 2002, pp. 221–228.
Original Russian Text Copyright © 2002 by Ivanov, Shikhovtsev, Podyminogin, Averboukh, Akhmetov, Davydenko, De\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l} \)chuli.
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Ivanov, A.A., Shikhovtsev, I.V., Podyminogin, A.A. et al. RF discharge-based plasma emitter. Plasma Phys. Rep. 28, 196–203 (2002). https://doi.org/10.1134/1.1458986
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DOI: https://doi.org/10.1134/1.1458986