Speaker
Description
Circular Electron Positron Collider as a Higgs and high luminosity Z factory, the accelerator Technical Design Report has been released in the end of 2023. 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 the high lumimorsity Tera-Z. TPC requires the longitudinal time resolution (<100ns) and the physics goals require Particle Identification determine (PID) resolution (<3%).
In this talk, we will present the feasibility and progress of the high precision TPC technology for circular collider, even at Tera-Z. The fundamental parameters such as the spatial resolution, PID with the good separation power and the drift velocity were studied by the simulation and measurement using a TPC prototype with 500mm drift length. We will review the track reconstruction performance results and summarize the next steps towards TPC construction for CEPC physics and detector TDR, also some good inputs and contributions from Lepton Collider Time Projection Chamber international collaboration.
