用于AMS的RFQ加速器能散问题研究

Research on Energy Spread of RFQ Accelerator in AMS

将RFQ作为加速器质谱系统(AMS)的加速器是AMS小型化的一条可能途径,减小RFQ加速器的输出束流能散是实现这一途径的关键。对RFQ加速器成形段部分对束流输出能散影响的分析表明,在减小调制系数、极间电压、同步相位,使各参数匹配的同时,适当地增大纵向聚焦力可显著降低RFQ输出束流能散。利用变参量RFQ动力学模拟程序RFQDYN进行模拟优化,得到输出束流能散为0.4%的RFQ加速器物理设计。

Using RFQ as the main accelerator is a possible way to make AMS more compact. It is most important to reduce the energy spread of RFQ accelerator. Based on a theoretical analysis of the energy spread of RFQ shaper section, simulation by using computer code RFQDYN shows that an energy spread of 0.4% can be obtained by optimizing RFQ parameters.