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Description
Following the successful commissioning of a 5 MeV high-current deuteron beam in June 2024, the Linear IFMIF Prototype Accelerator (LIPAc) is entering a new operational phase with the integration of the superconducting RF (SRF) linac, targeting first 125 mA deuteron beam acceleration up to 9 MeV and to continuous wave from early 2027. This contribution presents the beam diagnostic strategy developed for SRF linac commissioning, guided by operational experience gained during the last beam operation commissioning phase, termed as Phase B+.
The Phase B+ campaign confirmed the beam operation procedure and the operational behaviour of Beam Diagnostic, enabling beam characterization and highlighted several limitations under high-current operation, including instabilities in Beam Position Monitors (BPM) signals, reliability constraints in profile monitors, limited redundancy in front-end electronics, and restricted spatial resolution in beam loss detection. These observations have directly informed a set of targeted upgrades implemented for the next beam operation phase, Phase C.
The upgraded system features reconfigured BPM coverage with improved signal integrity, an extended BLoM system with different detectors for enhanced loss localization, and ongoing modernization of the data acquisition architecture from VME to μTCA. Additional developments include the replacement of the material in the interceptive plates of the slits devices, in compliance with the operational requirements.
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