Design studies on an s-band hybrid accelerating structure
Design studies on an s-band hybrid accelerating structure
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DOI：
10.1007/s41605-017-0030-2
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发表时间：
2018-06
影响因子：
0.6
通讯作者：
Bin Gao;S. Pei;G. Shu;Y. Chi
中科院分区：
文献类型：
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作者：
Bin Gao;S. Pei;G. Shu;Y. Chi
背景电子直线加速器中的标准聚束系统一般由驻波预聚束器（PB）、行波聚束器（TW）和标准TW加速结构组成，为了在保持与标准聚束系统相似的束流性能的同时尽可能降低成本，提出了一种将PB、TW和标准TW加速结构集成在一起的混合加速结构（HAS），方法采用二维软件SUPERFISH和三维软件HFSS对HAS进行了射频设计，结果HFSS模拟的轴上电场分布完全满足动态要求。SW段相位跳变为180 °，TW段相位超前为120 °。结论完成了HAS的射频设计，并正在进行样机的工程设计。
BackgroundIn an electron linac, the standard bunching system is generally composed of a standing-wave (SW) pre-buncher (PB), a travelling-wave (TW) buncher and a standard TW accelerating structure.PurposeTo keep the beam performance similar to the standard bunching system but reduce the cost as much as possible, the hybrid accelerating structure (HAS) was proposed by integrating the PB, the B and the accelerating structure together.MethodsThe RF design of the HAS was conducted by 2D code SUPERFISH, which is used to determine the dimensions of the SW and TW cells, and 3D code HFSS, which is used to optimize the input and output RF coupler cells.ResultsThe on-axis electric field distribution simulated by HFSS can fully meet the dynamic requirement. The phase jump in SW section is 180while the phase advance in TW section is 120.ConclusionThe RF design of the HAS is completed, and the engineering design of the prototype is being conducted.