The Joint Accelerator Conferences Website (JACoW) is an international collaboration that publishes the proceedings of accelerator conferences held around the world.
TY - UNPB AU - Schwerg, N. AU - Aull, S. AU - Brunner, O. AU - Butterworth, A.C. AU - Therasse, M. ED - Zhao, Ning ED - Poole, John ED - Schaa, Volker RW TI - Interrelationships and Limits J2 - Proc. of eeFACT2016, Daresbury, UK, October 24-27, 2016 C1 - Daresbury, UK T2 - ICFA Advanced Beam Dynamics Workshop on High Luminosity Circular e^+e^- Colliders T3 - 58 LA - english AB - For the FCC ee-machine we consider 4 different operation scenarios (Z, W, H, t) with requirements ranging from a high beam current and HOM (Z) to high accelerating gradients (H, t). We investigate the RF system for the 4 machines towards cavity design, material choice and staging scenarios. We built a generic model of the RF system based on the mathematical relationships found in the common accelerator literature describing all relevant aspects, e.g., the amount of RF power or the overall length of the RF installation. These mathematical expressions depend on other quantities which are either fixed design variables or show further dependencies. The mathematical model can be represented as a directed graph allowing to study the impact of each of the design variables on the overall system performance. Furthermore, the model indicates when any of the quantities exceeds assigned limits, e.g., in power consumption. Applying these limitations to the RF model for a wide range of cavity types (number of cells), materials (Nb/Cu or bulk Nb), operating temperatures (2 or 4 K) and wake loss parameters we derive the most suitable parameter range for the two distinct machine layouts. PB - JACoW CP - Geneva, Switzerland ER -