标题： 优化弯曲晶体参数以实现环形加速器中的高效束流提取和准直 显示英文标题

标题： Optimizing the Bent Crystal Parameters for High-Efficiency Beam Extraction and Collimation in Circular Accelerators

摘要： 圆加速器中利用弯曲晶体的沟道效应进行束流提取和准直系统的效率得到确定。 提取效率与晶体几何参数（其长度、厚度和弯曲角度）、系统组件的方位位置以及隔板或刮刀的偏移量之间的依赖关系被给出。 考虑了晶体缺陷（非晶层、错位和扭转）对系统效率的影响，并提出了相应的容差。 表明通过优化晶体参数和系统组件的位置，可以在从2 GeV到7 TeV的宽能量范围内实现大于95%的提取效率。 显示英文摘要

摘要： The efficiency of the beam extraction and collimation systems in circular accelerators with the use of the channeling effect in a bent crystal is determined. The dependences of the extraction efficiency on the geometrical parameters of the crystal (its length, thickness, and bending angle), the azimuthal location of the system components, and the offset of the septum or scraper are presented. The influence of crystal imperfections (amorphous layers, misorientation, and torsion) on the efficiency of the systems is considered, and their tolerances are proposed. It is shown that an extraction efficiency of >95% can be attained over a wide energy range from 2 GeV to 7 TeV by optimizing the crystal parameters and the positions of the system components.