Reducing Beam-Related Background on Forward Physics Detectors Using Crystal Collimation at the Large Hadron Collider1
Reducing Beam-Related Background on Forward Physics Detectors Using Crystal Collimation at the Large Hadron Collider1
复制标题
在大型强子对撞机上使用晶体准直减少前向物理探测器的光束相关背景1
DOI：
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发表时间：
2020
影响因子：
4.6
通讯作者：
N. Turini
中科院分区：
文献类型：
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作者：
D. Mirarchi;V. Avati;R. Bruce;M. Butcher;M. D’Andrea;M. D. Castro;M. Deile;B. Dziedzic;K. Hiller;S. Jakobsen;J. Kašpar;K. Korcyl;I. Lamas;A. Masi;A. Mereghetti;H. G. Morales;Y. Gavrikov;S. Redaelli;B. Ferrando;P. Serrano;M. S. Camillocci;N. Turini
高能对撞机中的光束准直通常是通过围绕循环光束的大量非晶吸收器来进行的。过去几十年进行了多项研究，以建立一种创新的准直技术，该技术依赖于通过弯曲晶体的晶面之间的通道进行粒子偏转。我们报告了大型强子对撞机中晶体准直的操作使用，这是在低强度光束的特殊高${ensuremath{eta}}^{ensuremath{ast}}$物理运行中实现的，代表了加速器和高能物理的一个里程碑，可以为不久的将来新的协同效应铺平道路。该方案的部署是由机器模拟研究引导和推动的，然后使用实验提供的数据进行实验证实，这要归功于环形仪器无法达到的灵敏度。使用弯曲晶体作为主要准直级获得了与非晶准直器相关的光束相关实验背景减少、数据质量提高和光晕更快去除的证据。报告了准备研究和操作性能的详细描述，以及实验结果和理论预期之间的比较。
Beam collimation in high-energy colliders is customarily carried out by means of massive amorphous absorbers surrounding the circulating beam. Several studies were performed in the last decades to establish an innovative collimation technique that relies on particle deflection by means of channeling between crystalline planes of a bent crystal. We report the operational use of crystal collimation in the Large Hadron Collider that was achieved during a special high-${ensuremath{eta}}^{ensuremath{ast}}$ physics run with low-intensity beams, representing a milestone for both accelerator and high-energy physics that could pave the way for new synergies in the near future. The deployment of this scheme was steered and motivated by machine-simulation studies, which were then confirmed experimentally using data provided by the experiments thanks to a sensitivity not accessible with the ring instrumentation. The evidence of beam-related experimental background reduction, improved data quality, and faster halo removal with respect to amorphous collimators is obtained using bent crystals as the primary collimation stage. A detailed description of preparatory studies and operational performance is reported, together with a comparison between experimental results and theoretical expectations.
影响因子：
5
作者：
K. Nakamura;K. Hagiwara;K. Hikasa;H. Murayama;M. Tanabashi;T. Watari;C. Amsler;M. Antonelli
通讯作者：
K. Nakamura;K. Hagiwara;K. Hikasa;H. Murayama;M. Tanabashi;T. Watari;C. Amsler;M. Antonelli