论文标题
垂直游览固定场交替梯度加速器的光学设计
Optics Design of Vertical Excursion Fixed-Field Alternating Gradient Accelerators
论文作者
论文摘要
垂直游览固定场交流梯度加速器可以通过相对于动量和轨迹不变的曲调设计，这些曲线仅在垂直方向上彼此缩放。使用具有垂直指数呈垂直指数的引导场，磁体主体中的四极分量和磁铁末端的螺线管分量。由于耦合，需要以数值来执行参数的轨道和光学计算以及参数的优化。在本文中，理想化的磁场是根据第一原理计算出的，考虑到最终端。计算光学的参数依赖性和环的动态孔径，该示例的示例的示例约为25 m，从而将质子束从3 MeV加速到12 MeV。该论文首次使用专门设计的工具来首次报告这种加速器晶格的设计，用于分析横向耦合光学元件，而无需近似值。
Vertical excursion fixed-field alternating gradient accelerators can be designed with tunes that are invariant with respect to momentum and trajectories that are scaled images of each other displaced only in the vertical direction. This is possible using guiding fields that have a vertical exponential increase, with a skew quadrupole component in the magnet body and a solenoid component at the magnet ends. Because of the coupling this introduces, orbit and optics calculations and optimisation of parameters need to be performed numerically. In this paper, idealised magnetic fields are calculated from first principles, taking into account end fields. The parameter dependence of the optics and the dynamic aperture of the ring are calculated for the example of a ring with an approximately 25 m circumference that accelerates proton beams from 3 MeV to 12 MeV. The paper reports for the first time the design of such an accelerator lattice using tools specifically devised to analyse transverse coupled optics without the need for approximations.
