The Orsay 200 MeV Synchrocyclotron

The proposal for the 157 MeV p. Orsay synchrocyclotron modification was accepted on december 1972 and the project, which consists in rebuilding of a new multiparticle synchrocyclotron 200 MeV p. keeping the existing yoke (with some additional 200 tons of magnetic iron) and rearranging all the beam handling system in order to turn the heavy experimental apparatus to the best account, was presented at the 10th and 11th ECPM (Groningen 1973 and Louvain-la-Neuve, june 1974).