8–11 Jul 2024
The University of Tokyo, Japan
Asia/Tokyo timezone

Drift chamber with cluster counting techniques for CEPC

10 Jul 2024, 09:20
20m
381 (Science building n.1)

381

Science building n.1

Oral presentation (in person) Vertex, Tracking, Timing Vertex, Tracking, Timing detectors

Speaker

Dr Guang Zhao (IHEP)

Description

The Circular Electron Positron Collider (CEPC) is a large-scale collider facility with a circumference of 100 km. It is designed to study rich physics programs, including investigations into Higgs properties, electroweak physics and flavor physics. A good identification of charged hadrons is essential for the flavor physics and benefits the determination of jet flavor and jet charge. To achieve these physics goals, a drift chamber is proposed for excellent particle identification (PID) performance with the cluster counting technique. Cluster counting measures the number of primary ionizations (dN/dx) along the particle trajectory in a gaseous detector, rather than relying on energy loss (dE/dx). This approach represents a promising breakthrough in PID. The Poissonian nature of dN/dx provides a statistically significant way to measure ionization, potentially yielding a resolution two times better than dE/dx.
A detailed PID study of the drift chamber will be presented. Simulation studies, including the detector and electronics responses, as well as the machine-learning reconstruction algorithm, are performed to optimize the detector design and performance. The PID results using dN/dx and time-of-flight show that the kaon and pion separation power, with a track length of 1.2 m, can achieve a 3σ significance for momenta less than 20 GeV/c. Mechanical design has been carried out and finite-element-analysis results demonstrate a stable design. Fast readout electronics have been developed, and a detector prototype has been tested with an electron beam. The test results validate the performance of the electronics and the feasibility of the dN/dx method.

Primary author

Dr Guang Zhao (IHEP)

Co-authors

Fei Huang Gang Li Hongbin Liu Prof. Linghui Wu (IHEP) Mingyi Dong (Institute of High Energy Physics, CAS) Shengjie Jin Shengsen Sun Shuaiyi Liu Wei Wei Xiaohui Qian Xu Gao Yubin Zhao Zhefei Tian Zhenyu Zhang

Presentation materials