Schematic of experimental setup. 1 – cathode, 2 – hemispherical grid anode, 3 – discharge unit rotation system, 4 – anode tube, 5 – anode aperture, 6 – emission grid, 7 – accel-decel grids.
Experimental outline. 1 – TOF spectrometer, 2 – vacuum chamber, 3 – movable Faraday Cup, 4 – experimental ion source.
Angular distributions of particle current of Pb and Zn ions (sum of all charge states) for pure cathodes, and for a Zn0.4Pb0.6 cathode. I arc = 500 A, p = 10−6 Torr.
Evolution of charge state distribution of the ion beam extracted from a vacuum arc plasma with Al cathode, as a function of argon pressure.
Angular distributions of the total (all charge states) Al (left) and Ar (right) ion current density for different argon pressures.
Ion charge state distributions for ions from C, Co, and W cathodes, and for ions of those elements from a W0.4Co0.17C0.43 cathode.
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