Optimization of the three-dimensional electric f ield in IH-DTL  

作　　者：杜小楠 何源 原有进 张生虎 王志军 肖陈 徐孟鑫 孙列鹏 

机构地区：[1]Institute of Modern Physics,Chinese Academy of Sciences [2]Graduate University of Chinese Academy of Sciences [3]School of Nuclear Science and Technology,Lanzhou University

出　　处：《Chinese Physics C》2012年第5期452-455,共4页中国物理C（英文版）

基　　金：Supported by National Natural Science Foundation of China (10635090);supported by IMP

摘　　要：The tuning process of the three-dimensional electric field near the beam axis is very important in the optimization of the Interdigital H-mode Drift Tube Linac （IH-DTL）. The tuning of the longitudinal field distribution, the Kilpatrik （Kp） factor, and the transverse dipole field have been discussed in detail, combined with the radio-frequency tuning process of the 53.667 MHz short IH-DTL cavity, which was designed to accelerate 238 U 34＋ from 0.143 MeV/u to 0.289 MeV/u in the SSC-Linac injector project at the Institute of Modern Physics. The flatness criterion and the tube tuning method are discussed in order to meet the beam dynamics requirements. In the tube tuning process, the energy gain error in the cells should be reduced to less than ± 2%, and the Kp factor should be reduced to 1.6. The transverse dipole field and the method that uses a ＂plunger＂ to dismiss this dipole field are evaluated. The experience gained from the first cavity optimization benefits the tuning process of the three remaining IH-DTL cavities in the SSC-Linac project.The tuning process of the three-dimensional electric field near the beam axis is very important in the optimization of the Interdigital H-mode Drift Tube Linac （IH-DTL）. The tuning of the longitudinal field distribution, the Kilpatrik （Kp） factor, and the transverse dipole field have been discussed in detail, combined with the radio-frequency tuning process of the 53.667 MHz short IH-DTL cavity, which was designed to accelerate 238 U 34＋ from 0.143 MeV/u to 0.289 MeV/u in the SSC-Linac injector project at the Institute of Modern Physics. The flatness criterion and the tube tuning method are discussed in order to meet the beam dynamics requirements. In the tube tuning process, the energy gain error in the cells should be reduced to less than ± 2%, and the Kp factor should be reduced to 1.6. The transverse dipole field and the method that uses a ＂plunger＂ to dismiss this dipole field are evaluated. The experience gained from the first cavity optimization benefits the tuning process of the three remaining IH-DTL cavities in the SSC-Linac project.

关 键 词：IH-DTL acceleration cell transient time factor Kilpatrik factor transverse dipole field 

分 类 号：TL53[核科学技术—核技术及应用] TM561.3[电气工程—电器]