Neumann, A.; Anders, W.; Goergen, R.; Knobloch, J.; Kugeler, O.; Belomestnykhz, S.; Dobbins, J.; Kaplan, R.; Liepe, M.; Strohman, C. : CW MEASUREMENTS OF CORNELL LLRF SYSTEM AT HOBICAT. In: Conference Proceedings / 15th International Conference on RF Superconductivity, SRF 2011, July 25 - 29, 2011, Chicago, USA, 2011, p. [1-4]
Abstract:
Abstract In Energy Recovery Linacs, such as the Cornell ERL or BERLinPro, the main linac cavities are operated CW at low beam-loading. The choice of the external Q is given by two competing factors: The achievable field stability and the maximum provided RF power. To determine the optimum external Q, LLRF measurements with the Cornell system were performed at HoBiCaT to study the field stability at given microphonics detuning of a TESLA cavity for differ- ent gain settings and external Q values. Stable operation at external Q up to 2108 was demonstrated at a field phase stability of 0.02 degrees.