Transverse emittance measurement for the heavy ion medical machine cyclotron

作     者：Yong-Chun Feng Min Li Rui-Shi Mao Bing Wang Sheng-Peng Li Wei-Long Li Wei-Nian Ma Xin-Cai Kang Jin-Quan Zhang Peng Li Tie-Cheng Zhao Zhi-Guo Xu You-Jin Yuan 

作者机构：Institute of Modern PhysicsChinese Academy of SciencesLanzhou 730000China School of Nuclear Science and TechnologyUniversity of Chinese Academy of SciencesBeijing 100049China Lanzhou Ke jin tai ji CorporationLTDLanzhou 730000China Lanzhou University of TechnologyLanzhou 730050China 

出 版 物：《Nuclear Science and Techniques》 (核技术（英文）)

年 卷 期：2019年第30卷第12期

页      面：103-110页

核心收录：

学科分类：08[工学] 0807[工学-动力工程及工程热物理] 0827[工学-核科学与技术] 082701[工学-核能科学与工程] 0703[理学-化学] 0702[理学-物理学] 0801[工学-力学（可授工学、理学学位）] 

基　　金：supported by the National Natural Science Foundation of China(No.11775281) 

主　　题：Heavy ion medical machine Transverse emittance Slit-grid 

摘      要：The transverse emittance of the extracted beam from the heavy ion medical machine cyclotron is measured and then optimized for injection into the synchrotron.For the purposes of cross-validation,three methods,i.e.,slit-grid,Q-scan,and 3-grid,are used to measure the emittance.In the slit-grid technique,an automatic selection of the region of interest is adopted to isolate the major noise from the beam phase space,which is an improvement over the traditional technique.After iterating over the contour level,an unbiased measurement of the emittance can be obtained.An improvement in the thin lens technique is implemented in the Q-scan method.The results of these measurements are presented.