Studies and optimisation of the transition radiation performance for the ATLAS TRT with an improved detector simulation

A key requirement for the ATLAS Transition Radiation Tracker is to contribute to the electron identification by detecting transition radiation. The quality and quantity of the radiator material is a critical parameter for the performance of any transition radiation detector. In this note, studies of the transition radiation yield with the actual ATLAS TRT geometry are presented and compared with the results presented in the ATLAS Physics TDR. A comparison with the optimal configuration for the transition radiation performance is made.