Studies on the S-band bunching system with the Hybrid Bunching-accelerating Structure
Studies on the S-band bunching system with the Hybrid Bunching-accelerating Structure
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混合聚束加速结构S波段聚束系统的研究
DOI：
10.1016/j.nima.2018.01.011
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发表时间：
2018-04
期刊：
影响因子：
--
通讯作者：
Bin Gao
中科院分区：
文献类型：
--
作者：
Shi-Lun Pei;Bin Gao
通常，标准聚束系统由驻波（SW）预聚束器（PB）、行波（TW）聚束器（B）和标准加速结构组成。在工业领域，通常通过取消聚束器，将B和标准加速结构结合在一起，形成一个β变化的加速结构来简化聚束系统。这种简化系统的光束捕获效率往往比标准系统的光束捕获效率低。混合聚束器（HB）被证明是一个成功的尝试，以降低成本，但保持尽可能多的光束质量。在这里，我们建议专门简化标准聚束系统集成PB，B和标准加速结构在一起，形成一个混合聚束加速结构（HBaS）。与标准聚束系统相比，基于HBaS的聚束系统更加紧凑，成本得到最大程度的降低。在电子枪到直线加速器出口的束流传输效率几乎相同（约70%）的情况下，采用HBaS的直线加速器的束流能散和1 σ发射度分别比基于分离式PB/B/标准加速结构的直线加速器大约20%和约60%。尽管如此，所提出的HBaS可以广泛应用于工业直线加速器中，以大大提高束流捕获效率，而不会相当地增加建造成本。
Generally, a standard bunching system is composed of a standing-wave (SW) pre-buncher (PB), a traveling-wave (TW) buncher (B) and a standard accelerating structure. In the industrial area, the bunching system is usually simplified by eliminating the PB and integrating the B and the standard accelerating structure together to form a β-varied accelerating structure. The beam capturing efficiency for this kind of simplified system is often worse than that for the standard one. The hybrid buncher (HB) has been proved to be a successful attempt to reduce the cost but preserve the beam quality as much as possible. Here we propose to exclusively simplify the standard bunching system by integrating the PB, the B and the standard accelerating structure together to form a Hybrid Bunching-accelerating Structure (HBaS). Compared to the standard bunching system, the one based on the HBaS is more compact, and the cost is lowered to the largest extent. With almost the same beam transportation efficiency (∼ 70%) from the electron gun to the linac exit, the peak-to-peak (p-to-p) beam energy spread and the 1 σ emittance of the linac with the HBaS are∼ 20% and∼ 60% bigger than those of the linac based on the split PB/B/standard accelerating structure system. Nonetheless, the proposed HBaS can be widely applied in the industrial linacs to greatly increase the beam capturing efficiency without fairly increasing the construction cost.
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DOI：
10.1016/j.nima.2009.08.057
发表时间：
2009-10
影响因子：
1.4
作者：
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发表时间：
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影响因子：
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