Long term behaviour of material erosion and deposition on the vessel wall and remote areas of TEXTOR

Long term erosion/deposition at the plasma facing surfaces as well as the carbon transport to the remote areas are discussed. The erosion of the liner wall and the deposition at the inner walls of the pump ducts were quantified. A small net deposition of carbon was found also at the liner, but only in the vicinity of the toroidal belt limiter. A deposition of polymer like deuterium rich carbon films (D/C ∼ 0.7) took place in remote areas. Despite the minute deposition rate of ∼0.02 gC/h these deposits might be decisive in view of tritium retention in next step fusion devices