Speaker
Description
LLRF control of accelerating cavities with microsecond-scale pulses is challenging because short pulses limit the effectiveness of FPGA-based intra-pulse feedback, restricting control to pulse-to-pulse corrections. This is often insufficient to compensate RF-chain-induced jitter and achieve the required field stability. We propose a novel intra-pulse feedback scheme for short pulses, featuring autoconfiguration and support for advanced pulse shaping, including SLED systems.
An implementation of this novel feedback concept was developed and deployed at the INFN SPARC_LAB facility, representing the first realization of its kind. It is now routinely operated with state-of-the-art performance, demonstrating significantly improved phase stability compared with conventional pulse-to-pulse control.
We present here a new implementation for short-pulse operation, based on a different architecture that simplifies system integration. This paper describes its design and experimental validation, including measurements at INFN SPARC_LAB. The proposed solution extends the Libera LLRF platform and has strong potential for short-pulse accelerator applications.
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