摘要：研究并提出了一个负动量压缩因子（αp＜0）τ-粲工厂储存环磁聚焦结构．对其束团拉伸的计算表明：在设计流强，束团长度将比自然束长短，束团长度不会拉伸．

摘要：BEPCⅡ是BEPC的升级工程,它被设计工作在亮度为1033cm-2·s-1的τ-charm能区．为了提高BEPCⅡ的运行亮度,研究了BEPCⅡ对撞模式的小动量压缩因子模式．同时优化了这个模式下的动力学孔径和模拟计算了这个模式的亮度．

摘要：探讨了设计负动量压缩因子（αp＜0）的正负电子对撞机储存环磁聚焦结构的可行性及方法．作为应用实例，说明了设计αp＜0的τ-粲工厂磁聚焦结构的可能性．

摘要：北京大学30MeV超导加速器包含3个RF加速单元:自主研发的1.5cell DC-SC(直流-超导)注入器,经过升级的3.5cell DC-SC注入器,以及1.3GHz 2×9cell Telsa型超导加速腔.为充分利用该装置上高品质电子束,计划压缩1.5cell注入器出口电子束用于产生相干THz光,以及压缩2×9cell超导加速腔出口电子束产生红外自由电子激光.通过理论计算及模拟计算相结合设计了一套可变参数磁压缩系统,该系统可以同时满足两个RF加速单元后束团压缩的要求.

摘要：In this paper,short pulse radiation in Shanghai Synchrotron Radiation Facility(SSRF)is generated by the low momentum compaction factor(α_C)optics,and three kinds of the low-α_C optics are found,with the very lowα_C being adopted by reducing dispersion in the straight section to negative value in the *** acceptance is selected as objective functions in nonlinear optimization rather than the second orderα_C or other nonlinear driving *** optimal result is improved step-by-step by randomly setting harmonic sextupole *** optics modes,*** positiveα_C and low negativeα_C,are *** order to get a large energy acceptance and only one stable point in longitudinal phase space,the low negativeα_C optics is taken as an operation mode for the short pulse radiation in the SSRF.