报告题目：Ultra-Fast Silicon Detectors: a Decade of Developments Chasing Accurate 4D Tracking
报告人：Prof. Nicolo Cartiglia（Italian Institute of Nuclear Physics）
报告时间：12月16日10:00
报告地点：理八栋学术报告厅118
摘要：
In the past decade, there has been growing interest in the development of silicon sensors able to simultaneously accurately measure the time of passage and the position of impinging charged particles. Two design innovations have radically changed the performance of silicon sensors, transforming them into high-resolution timing detectors, capable of meeting the high demands of future 4D trackers: the introduction of internal moderate gain and of intrinsic charge sharing. The internal gain mechanism leads to large signals and improved time resolution, while charge sharing eliminates the necessity for extremely small pixels to achieve excellent spatial resolution.
In this seminar, I will outline the journey that led to the current, state-of-the-art, LGAD-based resistive silicon sensors designed for 4D-tracking. The journey started with the development of the UFSD (Ultra-Fast Silicon Detectors) sensors, which have excellent timing capabilities. An excellent spatial resolution with a low electrodes-density is achieved by introducing charge sharing in thin LGADs, thanks to a resistive read-out (also called RSD sensors). The goal of this device is to achieve a spatial resolution of a few micrometres using large pixels (150-200 micrometres), concurrently providing an excellent time resolution (~30 ps). LGAD- and RSD-based silicon sensors are now adopted, or considered, in several future experiments as the basis for several future low power, low-material 4D-trackers.
报告人简介：
Nicolo' Cartiglia is a Director of Research at the Italian Institute of Nuclear Physics in Turin, Italy.
During his career, he worked on ZEUS, NA48, KOPIO and, since 2000, on CMS, now focusing on the CMS upgrade.
Over the past 15 years, he has been working on enhancing the capabilities of silicon trackers to meet the demands of future experiments at colliders, satellites, and in low-energy X-ray detection. He contributed to the development of the 4D-tracking concept and its first implementation in the ATLAS and CMS detectors. Currently, he is focused on developing a tracker with excellent spatial and temporal resolutions while maintaining low power consumption.