标题： 极端晶体弯曲下的去通道化种群与6.5 TeV质子束 显示英文标题

标题： Dechanneling Population at Extreme Crystal Bending with 6.5 TeV Proton Beam

摘要： 利用安装在大型强子对撞机中的弯曲晶体进行的束流测量，为多阶段散射系统提供了在多TeV能量范围内的强子与晶体相互作用的信息。 特别是通过散射晕的扫描观察到了去沟道化种群。 利用存在不同曲率半径的晶体这一事实，记录了去沟道化与弯曲半径（R）的关系。 发现弯曲半径较小的晶体中去沟道化现象更为显著，因为在大型强子对撞机6.5 TeV的能量下，其弯曲半径过于接近临界值R_c，此时沟道化会丢失。 数据分析并与模拟结果进行比较，加深了对这一现象的理解，并可用于定义未来晶体散射系统升级中更高效晶体的规格。 显示英文摘要

摘要： Beam measurements with bent crystals, installed in the Large Hadron Collider to assist multistage collimation system, provided information on hadron interactions with crystals in the multi-TeV energy range. In particular, the dechanneling population was observed through scans of deflected halo with collimators. Taking advantage of the fact that crystals with different values of curvature radii were present, the dependence of dechanneling on bending radius (R) was recorded. Dechanneling was found to be enhanced in crystals with smaller bending radius, because it is too close to the critical value R_c at the LHC energy of 6.5 TeV where channeling is lost. Data analysis and comparison to simulation results provided a better understanding of the phenomena and could be used to define specifications for more performing crystals in future upgrades of the crystal collimation system.