论文标题
CMS 1阶段1像素检测器升级
The CMS Phase-1 Pixel Detector Upgrade
论文作者
论文摘要
CERN LHC的CMS探测器具有硅像素检测器作为最内向的子探测器。原始的CMS像素检测器已在2016/2017的LHC延长的年末技术停止中替换为升级的像素系统（CMS 1阶段像素检测器）。升级后的CMS像素检测器旨在应对LHC在2013 - 2014年第一次长时间关闭时，LHC升级到加速器后已达到的较高的瞬时亮度。与原始像素检测器相比，升级的检测器具有更好的跟踪性能和较低的质量，每侧有四个桶形层和三个端盖磁盘，可提供命中覆盖率，最高伪值的绝对值为2.5。本文介绍了CMS 1阶段1像素探测器的设计和构建，以及其从调试到碰撞数据的早期操作的性能。
The CMS detector at the CERN LHC features a silicon pixel detector as its innermost subdetector. The original CMS pixel detector has been replaced with an upgraded pixel system (CMS Phase-1 pixel detector) in the extended year-end technical stop of the LHC in 2016/2017. The upgraded CMS pixel detector is designed to cope with the higher instantaneous luminosities that have been achieved by the LHC after the upgrades to the accelerator during the first long shutdown in 2013-2014. Compared to the original pixel detector, the upgraded detector has a better tracking performance and lower mass with four barrel layers and three endcap disks on each side to provide hit coverage up to an absolute value of pseudorapidity of 2.5. This paper describes the design and construction of the CMS Phase-1 pixel detector as well as its performance from commissioning to early operation in collision data-taking.
