Y.M. Wang, S.I. Kwon, A.H. Regan (LANL)
A proposed RF system for the superconducting linac part of the SNS uses one klyston to drive between 8 to 16 superconducting cavities for cost saving reasons. For a proton linac like the SNS, the field in each individual cavity needs to be controlled to meet an overall system requirements. The RF control system for superconducting linac of the SNS consists of an outer loop for a vector sum of the cavity fields and a local loop for individual cavity. The local loop in the RF control system introduces an additional pole in the overall RF control system which further complicated the design of RF control system. This paper will address the practical design issues related to the multiple loop control system required for the superconducting RF control system. Lorentz force detuning effect will also be address in the overall RF control system performance.
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