论文标题
使用基于轨道的软件比对测量LHCB Velo检测器的热性能
Measurement of thermal properties of the LHCb VELO detector using track-based software alignment
论文作者
论文摘要
使用实时检测器比对程序研究了LHCB顶点定位器（VELO）的热性能。提出了检测器元素的位置和方向的变化，随Velo的工作温度的函数。这项研究使用了LHCB实验在LHC Run 2（2018年10月）进行的Velo温度扫描期间收集的数据集。与在$ -30^\ circ $的工作温度下，与在一系列温度从$+45^\ circ $至$ -25^\ circ $上进行的单个模块上的实验室测量相比，在工作温度的工作温度下显着收缩。通过推断实验室测量到较低温度的外推预期的热收缩，这项比对研究的结果很好地一致。
The thermal properties of the LHCb Vertex Locator (VELO) are studied using the real-time detector alignment procedure. The variation of the position and orientation of the detector elements as a function of the operating temperature of the VELO is presented. This study uses a dataset collected by the LHCb experiment during a VELO temperature scan performed at the end of LHC Run 2 (October 2018). Significant shrinkage of the VELO modules is observed at the operating temperature of $-30^\circ$ compared to the laboratory measurements on a single module taken at a range of temperatures from $+45^\circ$ to $-25^\circ$. The thermal shrinkage expected from the extrapolation of laboratory measurements to lower temperatures, and the results of this alignment study are in good agreement.
