摘要：An ion source for HL-2A Neutral Beam Injection(NBI)was operated successfully in March 2007,in South- western Institute of Physics.A bucket source type and three-grid-system are used in this new ion source *** filament current of ll00A,filament voltage of 12V,arc current of 1050A,arc voltage of 120V,highest plasmas density of 2.5×10^(12)/cm^3,extracted ion beam density of 0.44A/cm^2,plasma density uniformity better than 5% in the area close to the first grid,duration of 2s,for this new source,have been *** conceptual design,mechanical design and experiment result for the ion source are presented briefly in this paper.

摘要：In order to extract parallel beam from ion sources,it's necessary to design suitable electrode configurations in extraction *** the effect of the space-charge into account,the electrode configurations should vary with beam current density.A means of calculating extraction configuration of parallel beam with certain current density has been evolved from the space-charge limited *** solving Poisson equation and Laplace equation,the potential distribution close to the strip beam has been gotten.