Selection of Injector Synchrotron Parameters to Minimize Cost of the 200-BeV Accelerator

In choosing the type of injector system and in optimizing the parameters of any given type of system, we must consider relative cost advantages as well as relative technical advantages eventually entering into the arguments. In this paper we shall discuss a method of determining the cost of accelerator systems and give some examples that arose in the selection of an injector system for the proposed 200-GeV accelerator.1 The cost of the injector system cannot be considered apart from the total accelerator cost because the aperture of the main ring depends upon the energy and emittance of the beam transferred from the injector. Since the main ring is relatively much larger and more expensive than the injector system, a change which lowers injector cost can cause a much larger increase in main ring cost.