Speaker
Description
The Circular Electron Positron Collider accelerator Technical Design Report (TDR), as a Higgs and high luminosity Z factory, has been released in 2023 at Institute of High Energy Physics, CAS in China. The baseline design of a detector concept consists of a large 3D tracking system, which is a high precision (about 100μm) spatial resolution Time Projection Chamber (TPC) detector as the main track embedded in a 3.0T solenoid field, especially for the accelerator operating at High luminosity Tera-Z. TPC requires the longitudinal time resolution (<100ns) and the physics goals require PID resolution (<3%).
In this talk, we will present the feasibility and progress of the high precision TPC technology for Circular Electron Positron Collider, even at Tera-Z. The fundamental parameters such as the spatial resolution, PID with the good separation power using the cluster counting and the drift velocity were studied by the simulation and measurement using a TPC prototype with 500mm drift length. Compared with the pad readout using the simulation, the high granularity readout TPC option will obtain the better spatial resolution of single electrons, the very high detection efficiency in excellent tracking and good PID performance (less than 3σ). The results of track reconstruction performance and dE/dx were given.We will review the track reconstruction performance results and summarize the next steps towards TPC R&D for CEPC physics and detector TDR stage.
