2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/37442Ongoing studies for the TESLA TPC with GEM readout at DESY/Hamburg University are presented. They include basic GEM performances, tracking and the determination of the resolution using different pad sizes and geometries as well as ion feedback measurements.5 pages, 7 figures, To appear in the proceedings of International Workshop on Linear Colliders (LCWS 2002), Jeju Island, Korea, 26-30 Aug 2002High Energy Physics - Experimenttext