Overview: This research area focuses on the realm of particle detection, utilizing advanced technologies and innovative methodologies to delve into the mysteries of the microscopic world. The central focus of the research encompasses pivotal components such as pixel detectors, Topmetal chips, and MAPS chips, which are fundamental to achieving high-precision particle detection.

Members: Xiang-ming Sun，Dong Wang，Ya-ping Wang, Di Guo，Le Xiao，Chao-song Gao，Kai Chen，Ping Yang，Hu-lin Wang，Dong-liang Zhang，Peng-cheng Ai，Ying-qing Xia.

This research direction focuses on the field of particle detection, aiming to explore the mysteries of the microcosm through cutting-edge technologies and innovative methods. The core research content revolves around key technologies such as pixel chip design and development (Topmetal chips, MAPS chips, etc.), radiation-resistant high-speed readout electronics, and particle detector design and assembly. These are the cornerstone technologies for achieving high-precision particle detection, and they also expand the application of these technologies in industries such as medicine and manufacturing.

Vertex detectors are core equipment in high-energy physics experiments and are indispensable in both international and domestic high-energy physics experiments. Through the collaborative operation of pixel detectors and advanced chips, particle trajectories can be precisely tracked, and the initial vertex of particle interactions can be determined, providing critical data for exploring the fundamental structure of matter and the mechanisms of interactions. This detector is based on MAPS chips, which possess powerful data processing capabilities and can quickly capture particle signals. Combined with high-precision assembly technology, the internal structure is finely tuned to achieve accurate particle trajectory positioning and measurement, providing key data for high-energy physics research and assisting scientists in exploring the mysteries of the microscopic world of matter. For example, in the RHIC/STAR experiment and the LHC/ALICE experiment, our team participated in the development of silicon detectors. Additionally, we are leading critical technological innovations in silicon pixel tracking detectors in large scientific facility projects, such as the CHNS experiment, the EicC experiment and the CEPC experiment.

Neutrinoless double-beta decay is a key research topic in particle physics, aiming to confirm whether neutrinos are Majorana fermions, which has profound implications for the construction of a unified particle physics model. The experiment uses a high-pressure Time Projection Chamber (TPC) to ionize the working gas through high pressure, precisely measuring particle trajectories. Ion readout technology is the core, converting drift ion signals into electrical signals, with strong anti-interference ability and stable signals. Combined with signal processing algorithms, it can improve the detector’s response to weak signals and help unravel the mystery of neutrinoless double-beta decay.

The beam-positioning detector is a critical device in the CEE experiment, primarily used to accurately determine the position of ions in the beam. In the CEE experiment, it plays an irreplaceable role, enabling high-precision positioning of individual ions. With advanced sensing and analysis technology, this detector breaks through traditional limitations, allowing real-time tracking and localization of single ions, providing precise beam position data for the CEE experiment. This assists researchers in more accurate data analysis, greatly enhancing the research precision and reliability of the CEE experiment and advancing scientific progress in related fields.

High-speed readout electronics and chips are crucial components in high-energy physics experiments. Positioned close to the collision point of the collider, this special location captures the most cutting-edge particle collision data. The radiation environment at the collision point is harsh, but these systems possess strong radiation resistance and can operate stably. With ultra-high-speed signal processing technology, the information captured by the detectors can be quickly converted and transmitted, allowing researchers to access real-time particle collision details. This provides indispensable technical support for exploring the mysteries of the microscopic particle world and validating cutting-edge physical theories, pushing forward the progress of high-energy physics research.