First Studies of the External Beam from the Orsay S.C. 200 MeV

The first measurements on the external beams of the Orsay 200 MeV proton Synchrocyclotron are presented. A brief description of the different beam lines and a survey of the monitoring and control probes are given. Special attention is given to a new step-by-step motor driven beam scanner which leads to 0.1 mm resolution in the beam position. First crude estimation of vertical emittance is given. Preliminary physical experimental results and future measurement plans are presented.