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Ion source for production of metastable He+(2S1/2) ions (1988)

Dunford, R. W. ; Dewey, M. S.

[S.l.] : American Institute of Physics (AIP)

Review of Scientific Instruments 59 (1988), S. 443-447

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ISSN: 1089-7623

Source: AIP Digital Archive

Topics: Physics , Electrical Engineering, Measurement and Control Technology

Notes: The construction and performance of an electron bombardment ion source designed to produce a beam of low-energy (100–400 eV) singly ionized helium (He+) with a significant fraction of ions in the metastable 2S1/2 state is described. The source operates in the fringe field of a magnet and injects ions along the field lines into the center of the magnet. He+ currents of up to 70 μA with small beam energy spread (3 eV) are obtained. A typical metastable fraction is 0.08% for small He+ currents (2–5 μA).

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1063/1.1140225

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