Design study for split beam operation of the Indiana University cyclotron facility

Some of the design considerations are described for a beam transport system which will permit operation of two experiments concurrently with the external beam of the Indiana University Cyclotron Facility. Beam division by time slicing of the rf pulse microstructure can give widely spaced pulses to a time‐of‐flight experiment while allowing an experiment not sensitive to the missing pulses to proceed at only slightly reduced intensity and duty factor. Beam division by separation of the horizontal emittance bundle into two parts can give to two users a beam of half intensity with improved quality for high resolution experiments and an unaltered duty factor. The beam line design must be able to act upon the small deflections achieved by electrical separation devices at intermediate energies to produce very different beam paths. A design which will permit operation on split beam mode in the future with no significant increase in the initial capital cost is presented.