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近些年来,随着基础科学和应用科学对强流加速器需求的日益增加,强流加速器得到了很大推广和发展.在强流加速器的低能段,空间电荷效应会导致束流发射度的增长,束流品质的变坏.这样的束流通常需要空间电荷补偿来控制空间电荷效应.空间电荷补偿是指束流可以通过吸收与束流电性相反的粒子从而减少束流空间电荷发散力的一种效应.北京大学自主开放了PIC-MCC空间电荷补偿模型,该模型被应用在H+和H-束流的空间电荷补偿模拟当中,且得到了与实验符合得比较好的结果.
In recent years, with the increasing demand for high-current accelerators in basic and applied sciences, high-current accelerators have been greatly promoted and developed.In the low-energy section of high-intensity accelerators, the space charge effect leads to the increase of beam emittance , The quality of the beam deteriorates. Such a beam usually needs space charge compensation to control the space charge effect. The space charge compensation means that the beam current can be reduced by absorbing particles with the opposite charge to the beam current One effect is that the PIC-MCC space charge compensation model is opened by Peking University. This model is applied to the space charge compensation simulation of H + and H-beams, and the result is in good agreement with the experiment.