论文标题
新的爱丽丝内部跟踪系统的调试
Commissioning of the new ALICE Inner Tracking System
论文作者
论文摘要
爱丽丝（大型离子对撞机实验）的内部跟踪系统（ITS）的升级将扩展重型燃烧哈登子和低质量障碍的测量值，以比当前达到的横向动量较低，并增加读数功能，以结合完整的相互作用。此外，在低横向动量下，跟踪效率将提高。为了实现这一目标，新的爱丽丝它由七层定制单片活性像素传感器设计，称为Alpide，其空间分辨率为$ 5 \，\ Mathrm {μm} $。基于阿比德的检测器设计的使用将使最内部三层的每层材料预算每层每层的材料预算降低到$ 0.35 \％\，\ mathrm {x_0} $，而前四层的每层$ 1.14 \ n层，相比之下，$ 1.14 \％\ maths $ \ n lays $ \，\ mathrm {x_0} $。世界各地的许多地点的施工工作都导致了一个完全组装和连接的检测器，该检测器目前正在对爱丽丝洞穴进行安装之前进行地面调试。这项贡献讨论了新的探测器的设计和当前状态，包括用于表征检测器的方法以及到目前为止获得的结果。
The upgrade of the Inner Tracking System (ITS) of ALICE (A Large Ion Collider Experiment) will extend measurements of heavy-flavour hadrons and low-mass dileptons to a lower transverse momentum than currently achieved and increase the readout capabilities to incorporate the full interaction. Furthermore, the tracking efficiency will be improved at low transverse momentum. To achieve this, the new ALICE ITS is comprised of seven layers of a custom Monolithic Active Pixel Sensor design known as ALPIDE, with a spatial resolution of $5\,\mathrm{μm}$. The use of the ALPIDE-based detector design will reduce the material budget to $0.35\%\,\mathrm{X_0}$ per layer for the innermost three layers, and to $1.0\%\,\mathrm{X_0}$ per layer for the outermost four layers, compared to $1.14\%\,\mathrm{X_0}$ per layer in the previous ITS. The construction effort in numerous sites around the world has resulted in a fully assembled and connected detector, which is currently undergoing on surface commissioning before its installation in the ALICE cavern. This contribution discusses the design and the current status of the commissioning of the new ITS detector, including the methods used to characterise the detector and the results obtained so far.
