CEPCRFPowerSource所创新项目-CEPC预研总结报告会-Indico.pptVIP

CEPC RF Power Source 所创新项目-CEPC预研总结报告会 CEPC 650MHz Klystron Development Zusheng ZHOU(周祖圣) Accelerator Division Dec.26, 2018 * Content Design RD Progress 1st tube（所创新+科学家工作室） High efficiency design（科学家工作室） Summary * Design Klystron key design parameters Parameters mode Now Future Centre frequency (MHz) 650+/-0.5 650+/-0.5 Output power (kW) 800 800 Beam voltage (kV) 80 70 Beam current (A) 16 15 Efficiency (%) 60 80 * ? 研究内容 预期目标 第一年 进行充分调研，采用国际合作，完善速调管模拟软件，优化设计。 完成样管理论设计。 第二年 完成样管理论设计，开始样管工程设计，实现关键技术的引进、吸收、再创新。 完成样管工程设计。 第三年 在国内协作单位，完成第一支连续波速调管样管加工。 在国内协助单位的支持下，开始样管加工制造。 任务书 * Short-term schedule * Klystron Schedule and strategy η60% η~70% η60% η75% η~80% * High Efficiency RF Source RD Collaboration ① IHEP (Institute of High Energy, CAS) ② IE (Institute of Electronics, CAS) ③ GLVAC (GLVAC Industrial Technology Research Institute for High Power Devices) ………. 2017.11.24@IHEP 2018.03.03@IE 2018.06.02@GLVAC 2018.09.21@IHEP 2018.12.14@IE * 1st tube Design Electron gun RF interaction region Focusing magnet Output window Collector Mechanical and manufacture * Electron Gun DGUN EGUN R=0, Z=0 (with f10 hole) Current=15.09 A Perveance= 1.45μI/V3/2 R=0, Z=0 (5mm shifted MA anode towards cathode part ) Current=15.19 A Perveance= 1.46μI/V3/2 R=0, Z=0 (with f10 hole) Current=14.83A Perveance= 1.43μI/V3/2 R=0, Z=0 Current=15.09A Perveance= 1.45μI/V3/2 1.7% difference 0.7% difference * RF interaction region 1D/2D/3D efficiency: 73%/68%/65% * Focusing magnet Amplitude of magnetic field Bz on axis Brilliouin field= 111 Guass by assuming B/Bb=1.8 then- K=0.6 - Bcathode=26.5 Gauss Magnetic Field= 207 Gauss POSSION Simulation Results * Output window Output window structure Output window’s reflection coefficient vs. frequency The output window is designed by coaxial choke structure CST simulation results * Collector The maximum power for collector is about 1.23MW, water cooling flow is about 1400l/min. Thermal deformation simulation * Mechanical and manufacture * Mechanical