内容：

The High-Luminosity upgrade of the LHC and future hadron colliders will present us unprecedented instantaneous luminosities with a much higher pile-up in the collision events than the current LHC. Effective and precise measurements of the particle tracks and vertices in such a high rate and high radiation environment is a major challenge for experiments in such colliders. In this talk, I will present various developments of tracking detectors for HL-LHC and beyond that are aiming to solve such challenges, including the Phase-II upgrade of the ATLAS inner tracker strips detector, and various R&D works towards 4D tracker with precision timing for future upgrades of LHC experiments. Precision timing measurement of charged particles will not only suppress the pile-up effect on track and vertex reconstruction but also open a new window for many new physics searches such as long-lived particle searches. A significant challenge for a 4D tracker is the design of readout chips due to extreme requirements on area, power consumption, etc. In this talk, I will discuss some recent R&D activities on the design of pixel readout ASIC prototype with 28 nm CMOS technology with a fast analog front end and in-pixel TDC and prospects for the ultimate 4D tracker for HL-LHC and beyond.

人物介绍：

Zhicai Zhang is a Chamberlain Fellow at Lawrence Berkeley National Laboratory. 

He is currently working on the ATLAS ITk strips Phase-II upgrade on the production and testing of the powerboard for the strips modules. He is also working on the design and testing of a new generation of the Pixel readout chip with precision timing. 

He obtained his Ph.D. in physics in 2021 from California Institute of Technology, where he worked on the development of the MIP Timing Detector for the CMS Phase-II upgrade. His physics research focused on searching for long-lived particles with precision timing detectors at CMS. He also made leading contributions to the first observation of the production of three massive gauge bosons.