Non-Intercepting Ion Phase Measuring Equipment of the Isochronous Cyclotrons at Karlsruhe and Julich

A non-intercepting ion phase measuring equipment is in use at the Karlsruhe cyclotron. Five phase signals, steadily and simultaneously displayed are presenting a good survey of phase width and phase distribution versus radius. High noise immunity is obtained by the use of differential electrostatic pickup probes. Concerning the Jÿlich cyclotron a similar device with twelve double electrostatic probes is in construction.