The Maryland University Sectored Isochronous Cyclotron Music

This paper describes the main features of the "Music" cyclotron machine as they appear after completion of the basic studies and initiation of the procurement of the components. Music is funded by the United States Atomic Energy Commission. Studies, engineering, procurement and construction are performed by Raytheon Company and CSF under control of Pr HOLMGREN of the University of Maryland, and important contributions from Dr Reiser, Dr Kim and Ken Jenkins, in all phases of computation or design. Music is a variable energy cyclotron of nominal energy 100 MleV protons using a four sectors magnet and two 90° dees connected to two panel tuned RF cavities. The conventional ion source will be mounted through a hole in the frame. Axial injection from an external source is also envisaged. Extraction will use electrostatic and electromagnetic deflectors. The cyclotron general arrangement is similar to the Grenoble machine. It has been designed to accelerate protons up to at least 100 MeV, deuterons up to 70 MeV, alpha particles up to 140 MeV and He3 up to 190 MeV. In order to ensure the 100 MeV proton value, the magnetic field was designed for 114 MeV and it turns out how that with the help of the installed flutter coils (hill an valley coils) somewhat higher proton energies could be made stable up to extraction radius.