The high current ion source system HOLCROSS

Abstract

The model HOLCROSS ion source is designed for the production of high current and brightness ion beams for application in particle accelerator injection and ion implantation. The cross type hollow cathode device in which the cross size of the cathode is greater than a longitudinal size is described. This system allows the creation of a quiet, cold and stable plasma of all cross sections. Compared with traditional hollow cathode systems this one is characterised by improved technical and operational performance. In the case of a duoplasmatron ion source the cross hollow cathode is optimised for gaseous charges such as noble gases, nitrogen, oxygen etc. A description of the source is given, together with some recent results. With a one aperture extraction system in which the square of the anode hole equals 0.25 mm/sup 2/ this source will produce more than 15 mA H/sub 1sup +/ at 8 keV and 200 mA discharge current.<>