针对应用于硼中子俘获治疗的加速器中子源的束流偏转问题,为其低能束流传输线部分设计了一套斩束器,通过理论计算与软件模拟,验证方案的可行性。为了解决斩波器电场强度不均匀问题,引入圆弧电极设计结构,微波工作室(CST Studio Suite)...针对应用于硼中子俘获治疗的加速器中子源的束流偏转问题,为其低能束流传输线部分设计了一套斩束器,通过理论计算与软件模拟,验证方案的可行性。为了解决斩波器电场强度不均匀问题,引入圆弧电极设计结构,微波工作室(CST Studio Suite)模拟仿真表明其具有更好的电场分布均匀性。发展了基于Python程序的CST与TraceWin联合束流动力学模拟,结果表明设计的斩波器能够高效率地实现束流偏转功能,设计方案具有良好的实际应用价值和意义。展开更多
Electron beam injectors are pivotal components of large-scale scientific instruments,such as synchrotron radiation sources,free-electron lasers,and electron-positron colliders.The quality of the electron beam produced...Electron beam injectors are pivotal components of large-scale scientific instruments,such as synchrotron radiation sources,free-electron lasers,and electron-positron colliders.The quality of the electron beam produced by the injector critically influences the performance of the entire accelerator-based scientific research apparatus.The injectors of such facilities usually use photocathode and thermionic-cathode electron guns.Although the photocathode injector can produce electron beams of excellent quality,its associated laser system is massive and intricate.The thermionic-cathode electron gun,especially the gridded electron gun injector,has a simple structure capable of generating numerous electron beams.However,its emittance is typically high.In this study,methods to reduce beam emittance are explored through a comprehensive analysis of various grid structures and preliminary design results,examining the evolution of beam phase space at different grid positions.An optimization method for reducing the emittance of a gridded thermionic-cathode electron gun is proposed through theoretical derivation,electromagnetic-field simulation,and beam-dynamics simulation.A 50%reduction in emittance was achieved for a 50 keV,1.7 A electron gun,laying the foundation for the subsequent design of a high-current,low-emittance injector.展开更多
文摘针对应用于硼中子俘获治疗的加速器中子源的束流偏转问题,为其低能束流传输线部分设计了一套斩束器,通过理论计算与软件模拟,验证方案的可行性。为了解决斩波器电场强度不均匀问题,引入圆弧电极设计结构,微波工作室(CST Studio Suite)模拟仿真表明其具有更好的电场分布均匀性。发展了基于Python程序的CST与TraceWin联合束流动力学模拟,结果表明设计的斩波器能够高效率地实现束流偏转功能,设计方案具有良好的实际应用价值和意义。
基金supported by the Hundred-person Program of Chinese Academy of Sciences and the National Natural Science Foundation of China(No.11905074).
文摘Electron beam injectors are pivotal components of large-scale scientific instruments,such as synchrotron radiation sources,free-electron lasers,and electron-positron colliders.The quality of the electron beam produced by the injector critically influences the performance of the entire accelerator-based scientific research apparatus.The injectors of such facilities usually use photocathode and thermionic-cathode electron guns.Although the photocathode injector can produce electron beams of excellent quality,its associated laser system is massive and intricate.The thermionic-cathode electron gun,especially the gridded electron gun injector,has a simple structure capable of generating numerous electron beams.However,its emittance is typically high.In this study,methods to reduce beam emittance are explored through a comprehensive analysis of various grid structures and preliminary design results,examining the evolution of beam phase space at different grid positions.An optimization method for reducing the emittance of a gridded thermionic-cathode electron gun is proposed through theoretical derivation,electromagnetic-field simulation,and beam-dynamics simulation.A 50%reduction in emittance was achieved for a 50 keV,1.7 A electron gun,laying the foundation for the subsequent design of a high-current,low-emittance injector.
文摘光束线站真空安全联锁是保障同步辐射光源储存环的运行安全与线站关键设备安全的重要系统。文章阐述了合肥光源新建成的金华光束线站真空安全联锁系统的最新设计方法。基于新型的高性能可编程控制器PLC(Programmable Logic Controller)和开放的软件平台EPICS 7(Experimental Physics and Industrial Control System)分布式控制系统架构,同时采用虚拟化技术,开发了全新的光束线站真空安全联锁系统。在系统远控的OPI界面开发上,采用Python脚本一键自动生成,提高了系统开发效率。此次设计在确保系统安全性和可靠性的同时,系统的性能以及用户人机交互的体验都得以提升。这些设计方法为正在建设的合肥先进光源的光束线站控制提供了技术储备和实践经验。
