第十二届中国 LHC 物理会议（CLHCP2026）

Peking University actively contributes to the CMS GEM upgrade for the CMS muon system. This report presents the latest progress of the ME0 project, including module production and validation, stack assembly and performance tests, and the production and CERN acceptance testing of ME0 GEM electronics boards (GEBs).

At the end of 2018, after the completion of the LHC Phase II operation, the European Centre for Nuclear (CERN) started the HL-LHC project. In this upgrade, the particles passed through the dipole magnet needed to be corrected again in both the horizontal and vertical directions with a double-aperture orbital corrector magnet. The magnet adopts a new type of Canted-Cosine-Theta (CCT) structure,...