Abstract:
During the LHC Run1&2 the LHCb experiment has successfully performed a large number of high precision measurements in heavy flavor physics, using 5fb-1 of pp collision data at center-of-mass energies of 7, 8 and 13TeV. For further physics research LHCb detector undergoes an upgrade during the Long Shutdown of LHC, with the aim to be operated at higher instant luminosity and to collect 50 fb-1 of data by 2028. The Upstream Tracker (UT) is a silicon strip tracking detector constructed as part of this upgrade. The UT provides a fast momentum measurement for the trigger as well as function as part of the overall tracking system where it will severely reduce the presence of “ghost” tracks.
The UT Tracker consists of ~1000 ~10x10 cm2 silicon strip sensors, with custom ASIC readout chips (SALT) arranged as modules containing flex hybrid circuits and ceramic substrates. These modules are mounted on staves, which are lightweight CFRP and foam sandwich structure supports having integrated CO2 cooling. The design details of the UT Tracker staves and modules will be presented, as well as construction procedures, optical QA feed back, wire bonds, etc.
报告人简介：袁煦昊，中科院高能物理研究所副研究员。2005年-2011年于南开大学物理学院博士，从事重味物理唯象学研究。2011年-2014年于清华大学工程物理系做博士后，随后2014年-2016年于俄罗斯BINP研究所做博士后，期间一直从事LHCb实验上重味物理实验研究。2017年-2022年在美国雪城大学做博士后，研究方向为LHCb一期升级中UT探测器升级研发。2022年底加入高能物理研究所。