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基于负离子 -中性束注入器中强流负离子束引出与加速系统的特点所建立的数值模拟模型和计算程序 ,通过数值模拟研究了强流负离子束系统电磁场位形、几何参数、等离子体参数、束流密度和负离子剥离损失对负离子束光学特性的影响。对 8电极 80 0 ke V强流负离子束系统的初步优化结果表明 :对引出流密度为 2 1m A· cm-2 的 H-离子束 ,当负离子初始温度为 0 .2 e V时 ,由系统出射的 85%束散角可达到 0 .2 3o。
Based on the numerical simulation model and calculation program of the negative ion - neutral beam injector in the strong current negative ion beam extraction and acceleration system, the electromagnetic field configuration, geometry parameters, plasma parameters, Influence of Beam Density and Negative Ion Peeling Loss on Optical Properties of Negative Ion Beams. The results of the preliminary optimization of the 8-electrode 80 ke V strong current negative ion beam system show that for the H-ion beam with an outgoing flow density of 21 mA · cm-2, when the initial negative ion temperature is 0.2 eV, The outgoing 85% beam divergence angle can reach 0 .2 3o.