Speaker
Description
During the High Luminosity phase of LHC, up to 140 - 200 proton-proton collisions per bunch crossing will bring severe challenges for event reconstruction. To mitigate pileup effects, an extended upgrade program of the CMS experiment is expected. Among these, a new timing layer, the MIP Timing Detector (MTD), will be integrated between the tracker and the calorimeters. With a time resolution of 30-60 ps, the MTD will enable 4D vertexing, bringing significant improvements in track-to-vertex association and object identification. The MTD is composed of two subsystems based on different technologies: the Barrel Timing Layer (BTL) consists of LYSO:Ce scintillating crystals readout by SiPMs, and the Endcap Timing Layer (ETL) is made of Low-Gain Avalanche Diodes.
The LGADs are an important development in silicon detector technology. They boast advantages such as excellent time resolution and signal-to-noise ratio, rendering them crucial for next-generation detectors. LGADs can be quickly evaluated for key electrical parameters—including breakdown voltage and depletion voltage—through I-V and C-V tests. These tests enable us to assess the quality of LGADs. This talk presents the characterization in the laboratory of 16x16 channels and test structures for the CMS ETL, including I-V and C-V measurement experimental setup and preliminary measured results.
| 请选择分会 | 粒子物理实验技术 |
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