THE ION-SOURCE MECHANISM FOR THE BERKELEY 88-INCH CYCLOTRON

The ion-source tube is inserted vertically through the magnet yoke and upper pole. This position was chosen because it saves peripheral space within the cyclotron, and permits withdrawal of the ion source through the roof shielding for servicing. The source is remotely controlled and can be moved either radially or azimuthally, and can also be rotated about its own axis. The system of mechanism for providing these movements is described, as well as related equipment.