Abstract
We present experimental deta on the multiple ionization of refractory metal ions formed in the vacuum-arc discharge plasma, which is achieved by injecting plasma into a magnetic trap and additionally heating it by high-power microwave radiation in the millimeter range. An increase in the high-power microwave source (gyrotron) frequency from 37.5 to 75 GHz allowed plasma of greater density to be heated to a sufficiently high electron temperature ensuring the multiple ionization of trapped particles. In the case of platinum, the microwave heating led to an increase in the average ion charge from 2 to 7, while the maximum platinum ion charge reached 10 and the total ion beam current amounted to 300 mA.
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Original Russian Text © A.V. Vodopyanov, S.V. Golubev, D.A. Mansfeld, A.G. Nikolaev, E.M. Oks, V.I. Khizhnyak, G.Yu. Yushkov, 2007, published in Pis’ma v Zhurnal Tekhnicheskoĭ Fiziki, 2007, Vol. 33, No. 20, pp. 44–49.
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Vodopyanov, A.V., Golubev, S.V., Mansfeld, D.A. et al. Multiple ionization of vacuum-arc-generated metal ions in a magnetic trap heated by high-power microwave radiation. Tech. Phys. Lett. 33, 872–874 (2007). https://doi.org/10.1134/S1063785007100197
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DOI: https://doi.org/10.1134/S1063785007100197