Recent improvements in the intensities and optical qualities of radioactive
beams have made possible the study of elastic and inelastic proton scatter
ing on unstable nuclei. The design and performances of an innovative silico
n strip detector array devoted to such experiments are described. The quali
ty of the data obtained are illustrated with recent results obtained at the
GANIL facility for unstable oxygen, sulfur and argon isotopes. Methods to
analyse the data using phenomenological and microscopic optical model poten
tials are discussed.