Precise simulation of drift chamber in the CEPC experiment

Abstract The Circular Electron Positron Collider (CEPC) is one of the future experiments which aims to precisely study properties Higgs boson and search for new physics beyond Standard Model. To achieve that, it puts strict requirements on particle reconstruction identification ability CEPC detector. In order obtain better performance, drift chamber chosen outer tracking detector can provide information used by cluster counting method getting excellent performance. evaluate performance method, necessary develop a simulation tool that be simulate response gaseous This work proposes way combine Geant4 Garfield++ at step level simulation. Due extreme time consumption simulating avalanche process in Garfield++, fast signal based neural network has been developed replace detailed It shows give consistent results with speedup factor 200.