Analysis and simulation of the tune ripple effect on beam spill ripple in RF-KO slow extraction  

作　　者：Wen-Bo Ye Hong-Juan Yao Shu-Xin Zheng Xia-Ling Guan Xue-Wu Wang 

机构地区：[1]Key Laboratory of Particle and Radiation Imaging(Tsinghua University),Ministry of Education,Beijing 100084,China [2]Laboratory for Advanced Radiation Sources and Application,Tsinghua University,Beijing 100084,China [3]Department of Engineering Physics,Tsinghua University,Beijing 100084,China

出　　处：《Nuclear Science and Techniques》2022年第5期91-101,共11页核技术（英文）

基　　金：supported by the National Natural Science Foundation of China(No.12075131)。

摘　　要：Tune ripple has a significant influence on beam spill ripple in RF-knockout(RF-KO)slow extraction.In this study,a model was proposed to explain how the tune ripple affects the beam spill in RF-KO slow extraction;consequently,a simulation was performed using the lattice of the Xi’an Proton Application Facility(XiPAF)synchrotron to verify the model.The simulation demonstrates that the tune ripple influences the beam spill in two ways.On the one hand,the tune ripple causes a direct fluctuation in the separatrix area,which induces beam spill ripple.On the other hand,the tune ripple influences the emittance growth rate in RF-knockout slow extraction.These two aspects simultaneously contribute to the beam spill ripple.

关 键 词：RF-knockout slow extraction Synchrotron Tune ripple Power supply ripple Beam spillripple 

分 类 号：V520.6[航空宇航科学与技术—人机与环境工程] V443