  The material eroded from the surface of plasma facing components is
redeposited partly close to high heat flux areas. At these locations, the
deposit is heated by the plasma and the deposition pattern evolves depending on
the operation parameters. The mapping of the deposit is still a matter of
intense scientific activity, especially during the course of experimental
campaigns. A method based on the comparison of surface temperature maps,
obtained in situ by infrared cameras and by theoretical modelling is proposed.
The difference between the two is attributed to the thermal resistance added by
deposited material, and expressed as a deposit thickness. The method benefits
of elaborated imaging techniques such as possibility theory and fuzzy logics.
The results are consistent with deposit maps obtained by visual inspection
during shutdowns.
