【摘要】 比较了行波与驻波两种工作方式以及前向波与返波型行波的不同特点；研究了返波型行波电子直线加速结构的工作特性；并针对返波型行波电子直线加速结构的特点，进行工作模式的选择；对工作频率为2856MHz，3π／4模的返波加速结构进行了优化设计；研究了带聚束段的返波型行波加速管的纵向与横向粒子动力学问题；为海关大型集装箱在线检测用加速器设计了一根9MeV返波型行波加速管，并与采用盘荷波导结构的加速管进行了对比．研究结果表明，返波型行波电子直线加速结构具有一定的优势，它把鼻锥型加速结构分流阻抗高及盘荷波导行波工作方式填充时间短，工作稳定性好等优点结合起来，性能明显优越．更多还原

【Abstract】 Future electron linacs require high gradient acceleration. In this paper, thestudies on the high shunt impedance backward traveling wave electron linacaccelerating stature (BTW) are presented. At first, the characteristics of BTW areresearched. The option of mode and optimal design methods of ascelerating cavity forBTW are stUdied. A Physical design method for BTW accelerators, includinglongitudinal and transversal particle dynamics, is given. Based on above studies, agMeV Bac accelerating tube at 3π /4 mode with frequency 2856MHz for inspechnglarge container as radiation source at customs is designed, and a comparison withdisk-loaded wavegulde accelerating tube is made. The result of research leads to theconclusion that backward traveling wave accelerating struture is preferable. BecauseBTW has higher effechve shunt impedance, shoder filling bine and more stableoperation.更多还原