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Abstract:
阿尔法磁谱仪（AMS）是位于国际空间站上的大型粒子科学实验，主要物理目标是研究暗物质、反物质、宇宙线起源和寻找新的物理现象。经过长达16年的研制和测试，AMS于2011年5月19日安装到国际空间站上，目前已稳定运行了10年，收集了超过1700亿宇宙线事例。本报告将介绍AMS实验对宇宙线正电子、电子、反质子、质子和原子核等能谱的精确测量结果。这些全面、系统、精确的实验数据不符合传统宇宙线理论的预期，为宇宙线起源、加速和传播机制等科学问题带来了新的认识。
Alpha Magnetic Spectrometer is a large particle physics experiment on the International Space Station. AMS is conducting a unique study of Dark Matter, antimatter, and the origin of cosmic rays, as well as searching for new phenomena. After 16-year extensive construction and testing, AMS has been installed on the International Space Station since May 19th, 2011. In its continuous operation of nearly 10 years, AMS has collected over 170 billion cosmic rays. In this talk, the latest AMS results on the cosmic ray positrons, electrons, antiprotons, protons and nuclei will be presented. AMS results can not be explained by current cosmic ray models. The precision data of different types of cosmic rays simultaneously measured by AMS is providing unique inputs for developing new theory of cosmic ray origin, acceleration, and propagation.
Biography:
许伟伟，博士毕业于中国科学院高能物理研究所，历任麻省理工学院博士后、研究科学家。2019年6月回国工作，现任山东大学教授、山东高等技术研究院粒子物理研究中心执行主任。自2011年参加AMS实验，主要分析了宇宙线正电子、电子和反质子能谱，开发了新的电磁量能器重建软件。
Weiwei Xu obtained Ph.D degree from the Institute of High Energy Physics, CAS. After that, he conducted postdoctoral research at MIT and soon was promoted to Research Scientist. In June 2019, he came back to China, and now is a professor in Shandong University and acting as the executive director of the Particle Physics Center at Shandong Institute of Advanced Technology. He joined AMS experiment since 2011, and devoted the measurement of cosmic ray positrons, electrons, and antiprotons. He also developed a new reconstruction software for AMS electromagnetic calorimeter, which plays key role in the positron and electron measurements.
Zoom: https://zoom.com.cn/j/69839576564（id: 69839576564，密码：123456）