Abstract
The University of Maryland cyclotron will accelerate protons up to approximately 145 MeV, alpha particles up to approximately 200 MeV, and a variety of other nuclear projectiles to corresponding energies. The experimental space is on two levels, separated vertically by 25 feet, with the upper area further subdivided into isolated experimental vaults. Five beam lines will be provided in the lower area; beam switching and energy analysis of up to E/E = 0.06%/ mm FWHM will be obtained using a 40-inch diameter, N = 0 circular pole magnet. Vertical translation of the beam to the upper area will be obtained by two 60-inch N = 0 double-focusing magnets which will also provide energy resolution up to ?E/E = 0.012%/ mm FWHM. Using quadrupoles, it will be possible to operate this magnet system in any of three modes: 1) doubly dispersive, 2) singly achromatic, 3) doubly achromati'c. Beam switching in the'upper area to any of six beam lines will be provided by a second 40-inch circular magnet. Design considerations will be given, and several important problems discussed.
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