From AMS in Space to CEPC on the Ground: Silicon Trackers
by
Tsung-Dao Lee Institute/N6F-N601 - Meeting Room
Tsung-Dao Lee Institute
Host: Hao Zhou
Join Tencent Meeting：https://meeting.tencent.com/dm/ZuxtxRo88e1a
Meeting ID: 208763586 (no password）
Abstract:
The Alpha Magnetic Spectrometer (AMS) aboard the International Space Station is the unique high-precision spectrometer in space, designed to measure charged particles and antiparticles in cosmic rays to study dark matter, antimatter, and the origin of cosmic rays. One of its core detectors, the Silicon Tracker, operates in a harsh space environment, where launch stress and continuous thermal variations in orbit can cause displacement of detector components. This presentation will introduce the in-orbit operation and the high-precision alignment of the AMS Silicon Tracker. China’s next-generation 100 km Circular Electron-Positron Collider (CEPC) aims to achieve a maximum electron-positron center-of-mass energy of 360 GeV. Its goals are to explore the Higgs boson and to search for new physics beyond the Standard Model. The CEPC Silicon Tracker is the largest and most complex tracking system ever built in China, with a surface area of about 100 m2. It covers a momentum range from below 1 GeV/c to over 100 GeV/c and achieves a momentum resolution of about 0.1%. The system integrates advanced pixel and microstrip detectors, readout electronics, mechanical support, and cooling structures. The Technical Design Report (Ref-TDR) of the detector is nearly complete and is expected to be globally released in middle of this year. This report will outline the CEPC Silicon Tracker’s design, current development status, and future plans.
Biography:
Qi Yan is a professor at the Institute of High Energy Physics, Chinese Academy of Sciences, specializing in experimental high-energy physics. He received his Ph.D. in Particle and Nuclear Physics from the University of Chinese Academy of Sciences in 2014. From 2014 to 2024, he worked at the Massachusetts Institute of Technology (MIT), holding positions as Research Associate, Postdoctoral Associate, Research Scientist, and Principal Research Scientist. As a core member of the Alpha Magnetic Spectrometer (AMS) experiment, he led developments of the key detector technologies, successfully overcoming critical technical challenges in operating a large, high-precision particle spectrometer in the complex space environment, resulting in outstanding detector performance. He also made significant contributions to AMS data analysis: among the 26 physics papers published by the AMS collaboration, 10 directly adopted his analysis results. In April 2024, he was recruited through the highest-level talent program of the Chinese Academy of Sciences (XXXX Category A, Academic Leading Talent). He now leads the CEPC Silicon Tracker group, driving forward the development of key detector technologies and contributing to the establishment of a world-class experimental platform.
