偏转结构中的场分布分析
Field distribution analysis in deflecting structures
摘要：
偏转结构目前主要用于束团旋转、束团诊断和提高束团的亮度。聚束旋转是粒子在六维相空间中分布的变换。与预期的变换一起，偏转结构由于偏转场分布中的特殊性（像差）而引入失真。偏转场的分布被认为是相对于非线性添加，这提供了发射度恶化期间的转变。偏转场被视为混合波HE_1和HM_1的组合。标准的选择和形成的偏转结构，最大限度地减少像差的水平制定和应用到已知的结构。通过与数值模拟结果的比较，证实了研究结果。
英文摘要：
Deflecting structures are used now manly for bunch rotation in emittance exchange concepts, bunch diagnostics and to increase the luminosity. The bunch rotation is a transformation of a particles distribution in the six dimensional phase space. Together with the expected transformations, deflecting structures introduce distortions due to particularities - aberrations - in the deflecting field distribution. The distributions of deflecting fields are considered with respect to non linear additions, which provide emittance deteriorations during a transformation. The deflecting field is treated as combination of hybrid waves HE 1 and HM_1. The criteria for selection and formation of deflecting structures with minimized level of aberrations are formulated and applied to known structures. Results of the study are confirmed by comparison with results of numerical simulations.
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