论文标题
运行3中LHCB的亮度
Luminosity at LHCb in Run 3
论文作者
论文摘要
LHCB检测器通过在填充过程中稳定瞬时光度，在〜1和〜2中优化了其性能。这是通过根据测量基于硬件的触发计数器的瞬时光度来调整两个碰撞光束之间的距离来实现的。与以前的运行相比，升级后的LHCB检测器在五倍的瞬时光度下运行，并且具有完全基于软件的触发因素。因此，采用了一种新的亮度测量方法。新的计数器特别关注时间的最大稳定性，并引入了〜3的新专用检测器。此外，为了验证从校准到数据捕获条件的线性性，进行了每次填充发射扫描。我们概述了新实施的光度测量方法以及在数据获取的前几周获得的早期成就。
The LHCb detector optimised its performance in Runs~1 and~2 by stabilising the instantaneous luminosity during a fill. This was achieved by tuning the distance between the two colliding beams according to the measurement of instantaneous luminosity from hardware-based trigger counters. The upgraded LHCb detector operates at fivefold instantaneous luminosity compared to the previous runs, and it has a fully software-based trigger. Consequently, a new approach to the luminosity measurement is adopted. New counters, with particular attention to maximum stability in time, and a new dedicated detector have been introduced for Run~3. Additionally, in order to verify linearity from calibration to data taking conditions, per-fill emittance scans are performed. We present an overview of the newly implemented methods for luminosity measurement, as well as early achievements obtained during the first few weeks of data taking.
