IPAC'26 - the 17th International Particle Accelerator Conference

Cavity Failure Compensation Study in Spiral 2 LINAC: Simulation and Experimentation

WEP5005

20 May 2026, 16:00

2h

C.I.D

Poster Presentation MC5.D01: Beam Optics Lattices, Correction Schemes, Transport Poster session

Speakers

Mr Alexandre Leduc (Grand Accélérateur National d'Ions Lourds)Dr Angie Orduz (Grand Accélérateur Nat. d'Ions Lourds)

Description

The SPIRAL2 LINAC at GANIL (Caen, France) was commissioned in 2019 and became operational for users in 2022. During these years, there have been various issues with amplifiers and cavities, which have caused the LINAC to operate without a cavity. Within the framework of the ReFilL project, several cases with one cavity out of order were simulated with TraceWin. Three cases were tested experimentally in 2024 with a 5mA deuterium beam.
In 2025, following a leak in the cavity CMA11, the LINAC has been operated without this cavity for two months. Demonstrating the feasibility of cavity failure compensation under operational conditions. We fully characterized the CMA11-out-of-order configuration, and investigated two additional cases with a second inactive cavity: CMA01--CMA11, CMA11--CMA12. In both cases, nominal beam energy was successfully recovered.
This article presents results of these studies and perspectives for cavity compensation at GANIL.