• [1]

    . XIE Z Q, Lyneis C M. Rev. Sci. Instr., 1994, 65: 29472. Kremers H R et al. Proceedings of the 16th International Workshop on ECR Ion Sources, edited by M. Leitner(Berkely, 2004), p. 1753. Kremers H R et al. Rev. Sci. Instrum., 2006, 77: 3114. Koivisto H et al. Nucl Instr. and Meth. In Phys. Res., 2001,B174: 379-3845. Langmuir I. Phys. Rev., 1913, 2: 450-486