  The present paper deals with the surface heat flux estimation with
thermocouples (TC) and fiber Bragg grating (FBG) embedded in the plasma facing
components (PFC) of the WEST tokamak. A 2D heat transfer model combined with
the conjugate gradient method (CGM) and the adjoint state is used to estimate
the plasma heat flux deposited on the PFC. The plasma heat flux is
characterized by the time evolution of its amplitude and spatial shape on the
target (heat flux decay length $\lambda^t_q$, power spreading in the private
flux region $S^t$ and the strike point location $x_0$). As a first step, five
ohmic pulses have been investigated with different magnetic configuration and
divertor X-point height varying from 44 to 68 mm from the surface. Despite an
outboard shift, the relative displacements of the outer strike point as well as
the heat flux decay length derived from the TC/FBG systems are consistent with
the magnetic equilibrium reconstruction.
