Practical design of alternating-phase-focused linacs
Practical design of alternating-phase-focused linacs
复制标题
DOI：
--
复制
发表时间：
2014-04
期刊：
影响因子：
--
通讯作者：
R. Jameson
中科院分区：
文献类型：
--
作者：
R. Jameson
传统直线加速器中的传统磁横向聚焦占其成本和复杂性的很大一部分。通过使用称为交替相位聚焦的技术，可以从射频场获得横向和纵向聚焦。在没有直接理论支持的情况下，设计合适的序列一直很困难，这阻碍了交替相位聚焦的采用。综合报道的细节和新的物理和技术，产生了一种设计实用的交替相位聚焦线性加速器的新的通用方法。出于将粒子加速超过 500-600 倍能量增益的愿望，演示了具有高能量增益因子的非常长的序列。该方法通过简单的动力学和无空间电荷的情况进行了演示，随后空间电荷和更精确元素的合并是直接的。交替相位聚焦现在可以成为线性加速器设计者的另一种实用方法。除了传统的磁聚焦之外，还可以使用交替相位聚焦，并且可以用于最小化处理所需量的束电流所需的附加磁聚焦的量。
Conventional magnetic transverse focusing in conventional linear accelerators represents a high fraction of their cost and complexity. Both transverse and longitudinal focusing can be obtained from the radio frequency field by using the technique known as Alternating Phase Focusing. The design of suitable sequences has been difficult, without direct theoretical support, inhibiting Alternating Phase Focusing adoption. Synthesis of reported details and new physics and technique result in a new, general method for designing practical Alternating Phase Focusing linear accelerators. Very long sequences with high energy gain factors are demonstrated, motivated by the desire to accelerate particles over a factor of 500-600 energy gain. The method is demonstrated with simple dynamics and no space charge, later incorporation of space charge and more accurate elements is straight forward. Alternating Phase Focusing can now be another practical approach in the linear accelerator designer repertoire. Alternating Phase Focusing can be used in addition to conventional magnetic focusing, and could be useful in minimizing the amount of additional magnetic focusing needed to handle a desired amount of beam current.