Inflection and Extraction Systems at the Indiana University Cyclotron Facility

Properties of the magnetic and electrostatic elements which inflect beams into and extract from the injector and main stage cyclotrons at IUCF are described. Orbit separation is such that the assistance of orbit dynamical resonances is not employed. The beam stays in the median plane in all four systems. Inflection occurs after the beam has entered the cyclotron through one of the nearly field-free valleys; the beam crosses the central region and then experiences a bend of nearly 90° to enter the proper accelerated orbit. Extraction is accomplished by placing a substantial (~45°) bending magnet in one of the valleys just outside the region of circulating beam. Smaller elements upstream are then used to deflect the last turn so that it enters this magnet.