Speaker
Description
The Circular Electron Positron Collider (CEPC) was proposed as a Higgs and Z operation in Chinese High Energy Physics community, and the accelerator Technology Design Report (TDR) has been released in the end of 2023. The baseline detector design features a high-precision (approximately 100 $\mu m$) spatial resolution Time Projection Chamber (TPC) as the main tracking device surround a 3.0T solenoid field, even operated at the low lumionorstiy Z. The TPC is required to provide a standalone momentum resolution of 10$^−$4 (GeV/𝑐)$^{−1}$, and the physics requirement of Particle Indentification (PID) resolution should be reached to < 3%.
In this talk, the feasibility and update progress of high precision TPC as the main track detector for e$^+$e$^-$ collider will be presented. TPC detection aims the good separation power with the cluster counting to be considered and the simulation results of the pad/pixelated TPC technology for e$^+$e$^-$ collider will be given. Compared with the pad readout using the simulation, the high granularity readout TPC option (500 $\mu m$ $\times$ 500 $\mu m$) will obtain the better spatial resolution of single electrons, the very high detection efficiency in excellent tracking and good PID performance (less than 3$\sigma$). The track reconstruction performance and dE/dx results are presented. We review these findings and outline the next steps toward TPC construction for the ongoing physics and detector TDR document.
