PLASMA WALL INTERACTION AND ENERGY FLUXES IN RFX

The graphite first wall of the Reversed Field Pinch (RFP) experiment R FX has been inspected after one year of operation, Are tracks and ther mal erosion have been observed in particular around the two poloidal g aps of the shell. The ionization lengths calculated from the experimen tal edge profiles of electron temperature and density show that most o f the carbon atoms released by thermal erosion, arcing and Radiation E nhanced Sublimation (RES) are locally redeposited, whereas physical sp uttering, including self sputtering, results as the most important sou rce of carbon impurity.