Low Level RF for SRF Accelerators

Low level radio frequency (LLRF) systems are a fundamental component of superconducting RF accelerators.Since the release of the MicroTCA standard (MTCA.4), major developments in MTCA.4-based LLRF systems have taken place. State-of-the-art LLRF designs deliver better than 10−4 relative amplitude and 10mdeg phase stability for the vector sum control of SRF cavities. These developments in LLRF systems architecture and technology, driven by research institutes and supported by the industry are of highest importance for the European XFEL, but also for other SRF-based projects such as LCLS-II and the ESS, as well as for the next generation accelerators with 10−5 and mdeg regulation requirements