Simbol-X mirror module design scientific optimization.

The Simbol-X hard X-ray mission will be based on Wolter I focused telescope with multilayer mirrors. The formation flight concept allows a large flexibility in the focal length (FL) choice, while the use of multilayers makes possible the optimization of the mirror coating aiming at covering a very wide energy band (0.1 80 keV). On the other hand, there are other limiting parameters to be considered as e.g. the maximum mirror diameter for the Ni electroforming technology (70 cm) and the maximum size of the focal plane that should not exceed 8 cm. We will discuss the activities carried out to optimize the mirror module design, in order to achieve the best response in terms of effective area and field of view (FOV).