A multistage collimation system for the absorption of the growing halo of circulating beams is used at the Large Hadron Collider (LHC) to protect superconducting magnets and to ensure their reliable operation. A similar system is also planned for the Future Circular Collider (FCC). Studies for the improvement of the collimation system are performed prior to the operation of the LHC with a high luminosity. Studies have shown that one of the solutions to improve the beam collimation is the use of channeling in a short bent crystal, which serves as a primary collimator throwing particles deep into the secondary collimator by means of channeling. This system is very sensitive to the angular position of the crystal and various possible vibrations. In this work, another approach to beam collimation based on the bulk reflection of particles from bent crystal-lographic planes in a sequence of crystals has been proposed. Advantages of this scheme have been justified and a multistrip crystal device has been proposed to implement this scheme.

中文翻译：

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利用弯曲晶体中的粒子反射准直大型强子对撞机中的光束

大型强子对撞机（LHC）使用了多级准直系统来吸收循环束的不断增长的光晕，以保护超导磁体并确保其可靠运行。还计划为未来循环对撞机（FCC）设计一个类似的系统。在具有高发光度的LHC操作之前，进行了用于准直系统的改进的研究。研究表明，改善光束准直的解决方案之一是在短弯曲晶体中使用沟道，该晶体用作初级准直器，通过沟道将粒子深深地注入次级准直器中。该系统对晶体的角位置和各种可能的振动非常敏感。在这项工作中 已经提出了另一种基于来自晶体序列的弯曲的晶体平面的粒子的整体反射的光束准直的方法。已经证明了该方案的优点，并且已经提出了一种多带晶体器件来实现该方案。