10.1007/978-3-319-04507-8_13-1
Open Access Version  (available 01.01.3000)

Abstract:
Superconducting radio-frequency (SRF) technology holds the promise of low-beam-impedance, high-gradient, CW operation and thus is ideally suited for use in high-power synchrotron light sources. Over 30 years of research and development has helped to bring the technology to maturity and to the point that its near turn-key operation is now feasible in such facilities. Many SRF systems are in routine operation in both storage-ring and LINAC-based light sources and they are the key to the realization of a number of novel light-source concepts such as ERLs, compact sources, xray- oscillator FELs or short-pulse operation in storage rings. An overview of the principles and advantages of SRF as well as the technology’s state-of-the-art and future challenges is given.