Study of resolution of the PANDA GEM detector with Garfield

The forward GEM tracker of the P̅ANDA detector at the future FAIR facility will track the particles produced in antiproton-proton annihilations and emitted in the polar angle range 5∘ –22∘. Position resolution at the level of 100 μ m and good time resolution are critical to work under luminosities up to 2×1032 c m −2 s −1. The simulations performed with Garfield program compared several detector layouts and determined the optimal granularity of readout electronics. The time resolution for two possible gas mixtures was also estimated.