Design Consideration of 650-MHz Circular Electron-Positron Collider Klystron and Simulation of Its Beam Tester

作     者：Un-Nisa Zaib Shigeki Fukuda 周祖圣 董东 王盛昌 肖欧正 陆志军 裴国玺 

作者机构：Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049 University of Chinese Academy of SciencesBeijing 100049 Key Laboratory of Particle Acceleration Physics and TechnologyInstitute of High Energy PhysicsChinese Academy of SciencesBeijing 100049 High Energy Accelerator Research OrganizationKEKOhoIbaraki 305-0801Japan 

出 版 物：《Chinese Physics Letters》 (中国物理快报（英文版）)

年 卷 期：2017年第34卷第1期

页      面：27-31页

核心收录：

学科分类：07[理学] 070202[理学-粒子物理与原子核物理] 0702[理学-物理学] 

基　　金：Supported by the National Natural Science Foundation of China under Grant No 11475201 the Innovation and Technology Fund of Institute of High Energy Physics 

主　　题：Electron guns 

摘      要：We present the first phase R&D for the 800 kW cw, 650MHz klystron for the future circular electron-positron collider (CEPC) project in China. The CEPC requires 192 klystrons and it is desired to be designed in the Institute of High Energy Physics, CAS, and manufactured domestically. Therefore, we present the manufacturing schedule of this project; the three-stage development from the beam test tube to the klystron having a high efficiency structure. Design of the beam test tube that comprises electron gun and collector is presented. First, gun simulation having a modulating anode is performed using DGUN software. The uniform beam trajectories with a beam perveance of 0.64 mu A/V-3/2 are simulated. We employ a Ba-dispenser cathode of radius 35mm with phi 10 hole at the center and obtain a current density on cathode less than 0.45 A/cm(2). The beam trajectories are also simulated over beam test tube of length about 2m with a magnetic field of 213 Gauss. Thermal analysis of the collector is performed using the ANSIS-CFX code and hence the cooling structure is determined. Mechanical design is almost carried out and it is in manufacturing stage.