标题： LHC中6.5 TeV质子的晶体准直清洁测量 显示英文标题

标题： Crystal Collimation Cleaning Measurements with 6.5 TeV protons in the LHC

摘要： 安全处理束流晕是现代超导强子对撞机的基本要求，以减少磁铁上的热负载和实验探测器的背景噪声。 在欧洲核子研究中心大型强子对撞机（LHC）中，建立了一个完全符合基线运行需求的多级系统。 在后期阶段，两个短弯晶被插入到贝特atron散射装置中，以研究在将它们作为散射层次的主要阶段时，对晕处理效率的增强效果。 每个晶体安装在一个高精度角度执行器上，称为转角仪，并安装在顺时针方向的束流1中，一个用于水平平面，一个用于垂直平面。 本文讨论了在碰撞能量下，标准散射方案中插入晶体与不插入晶体时的清洗性能测量；结果与理论预期进行了比较。 显示英文摘要

摘要： Safe disposal of beam halo is a fundamental requirement of modern superconductive hadron colliders to reduce thermal load on magnets and background to experimental detectors. In the CERN Large Hadron Collider (LHC) a multistage system fully compliant with the needs of the baseline operation was build. At a later stage, two short bent crystals were interleaved to the devices for betatron collimation to investigate efficiency enhancement of the halo disposal when inserting them as primary stages of the collimation hierarchy. Each crystal was mounted on a high--accuracy angular actuator, called goniometer, and installed in the clockwise Beam 1, one for the horizontal and one for the vertical plane. In this paper, measurements of the cleaning performance at collision energy with and without inserting crystals in the standard collimation schemes are discussed; the results are compared to theoretical expectations.