Abstract
A method is proposed for separate measurements of the current produced by slow charge-exchange ions and that produced by the ions generated due to gas ionization by the beam ions and fast secondary electrons in the beam drift space. The method is based on an analysis of the current distribution over the electrodes of a modified Faraday cup with nonequipotential electrodes and allows one to determine the coefficient of ion-induced electron emission from the ion collector and the charge-exchange cross section of the accelerated ions. The method has been employed to measure the current of an argon ion beam with an ion energy from a few electronvolts to several tens of kiloelectronvolts and to study the processes in the beam drift space at pressures of 0.03–0.15 Pa.
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Original Russian Text © N.V. Gavrilov, A.S. Kamenetskikh, 2006, published in Zhurnal Tekhnicheskoĭ Fiziki, 2006, Vol. 76, No. 6, pp. 32–37.
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Gavrilov, N.V., Kamenetskikh, A.S. Experimental study of the influence of the processes in the ion-beam drift space on beam current measurements. Tech. Phys. 51, 708–714 (2006). https://doi.org/10.1134/S1063784206060053
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DOI: https://doi.org/10.1134/S1063784206060053