Speaker
Description
SPIRAL2 is a superconducting linac located in Caen, France. It is designed to accelerate intense ion beams with A/Q ratios ranging from 1 to 7, which can be used in various experimental facilities for nuclear physics and applied research. In this machine, RF systems have been identified as a major source of beam interruptions*, limiting the overall availability of SPIRAL2.
Cavity failure compensation is a beam dynamics approach that can mitigate the duration of such beam trips by allowing operation without the failed systems. In 2025, following an actual cavity failure, this method enabled SPIRAL2 to operate for two months with the failed cavity removed from operation, while recovering a nominal beam**.
However, determining suitable compensation settings remains a time-consuming and error-prone task. To address this challenge, we are developing LightWin***, an automatic tool dedicated to cavity failure compensation. In this study, we present our latest developments and introduce acceptance-preserving compensation strategies that have proven effective for the SPIRAL2 superconducting linac.
Footnotes
- Bernaudin et al., "Three Years of Operation of the SPIRAL2 LINAC: Cryogenics and Superconducting RF Feedback," in LINAC2022.
** Leduc et al., "Cavity Failure Compensation Study in SPIRAL2 Linac: Simulation end Experimentation" in IPAC2026.
*** Yee-Rendon et al., "A systematic analysis of cavity compensations in the JAEA-ADS linac utilizing the LightWin tool", in IPAC2026.
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