Noninvasive LHC transverse beam size measurement using inelastic beam-gas interactions
Noninvasive LHC transverse beam size measurement using inelastic beam-gas interactions
复制标题
利用非弹性束-气体相互作用进行无创大型强子对撞机横向束尺寸测量
DOI：
10.1103/physrevaccelbeams.22.042801
复制
发表时间：
2019
影响因子：
1.7
通讯作者：
M. Wlochal
中科院分区：
文献类型：
--
作者：
A. Alexopoulos;C. Barschel;E. Bravin;G. Bregliozzi;N. Chritin;B. Dehning;M. Ferro;M. Giovannozzi;R. Jacobsson;L. Jensen;R. Jones;V. Kain;R. Kieffer;R. Matev;M. Rihl;V. Guimaraes;R. Veness;S. Vlachos;B. Würkner;A. Bay;F. Blanc;S. Gianì;O. Girard;G. Haefeli;P. Hopchev;A. Kuonen;T. Nakada;O. Schneider;M. Tobin;Zhirui Xu;R. Greim;T. Kirn;S. Schael;M. Wlochal
束气顶点探测器（BGV）是一种利用束气相互作用的重建轨迹来测量大型强子对撞机（LHC）中横束大小的无创仪器。BGV探测器于2016年安装，作为高亮度LHC项目研发的一部分。它允许在整个LHC加速周期中使用高强度物理光束测量光束大小。测量的平均光束尺寸精度优于2%，积分时间小于30 s，而单个质子束的横向尺寸在5分钟内以5%的分辨率测量。光束与气体相互作用产生的粒子沿光束方向在特别开发的气体体积中出现，由两个由闪烁光纤制成的跟踪站记录下来。闪烁体触发系统在线选择具有源自交互区域轨迹的事件。为了简化设计，减少对加速粒子束的干扰，所有探测器元件都位于束流真空管外。本文给出的光束尺寸测量结果是基于来自同一光束-气体相互作用顶点的轨迹之间的相关性。
The beam-gas vertex (BGV) detector is an innovative instrument measuring noninvasively the transverse beam size in the Large Hadron Collider (LHC) using reconstructed tracks from beam-gas interactions. The BGV detector was installed in 2016 as part of the R&D for the High-Luminosity LHC project. It allows beam size measurements throughout the LHC acceleration cycle with high-intensity physics beams. A precision better than 2% with an integration time of less than 30 s is obtained on the average beam size measured, while the transverse size of individual proton bunches is measured with a resolution of 5% within 5 min. Particles emerging from beam-gas interactions in a specially developed gas volume along the beam direction are recorded by two tracking stations made of scintillating fibers. A scintillator trigger system selects, on-line, events with tracks originating from the interaction region. All the detector elements are located outside the beam vacuum pipe to simplify the design and minimize interference with the accelerated particle beam. The beam size measurement results presented here are based on the correlation between tracks originating from the same beam-gas interaction vertex.
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