Proton beam commissioning of the SPIRAL2 Single Bunch Selector

The single bunch selector of the SPIRAL2 accelerator allows reducing the bunch rate to the target of the Neutron For Science (NFS) facility in view of time of flight experiments. It involves two processes: a static dipole magnet deviates the beam on a 7.3 kW scraper, while the electric field of two...

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Bibliographic Details
Published in:Journal of instrumentation 2020-12, Vol.15 (12), p.T12011-T12011
Main Authors: Giacomo, M. Di, Ferdinand, R., Jacquot, B., Lagniel, J-M., Ledoux, X., Kamalou, O., Normand, G., Orduz, A.
Format: Article
Language:English
Subjects:
Accelerator Physics
Commissioning
Dipoles
Electric fields
Physics
Proton beams
Pulse generators
Traveling waves
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Summary:The single bunch selector of the SPIRAL2 accelerator allows reducing the bunch rate to the target of the Neutron For Science (NFS) facility in view of time of flight experiments. It involves two processes: a static dipole magnet deviates the beam on a 7.3 kW scraper, while the electric field of two high voltage travelling wave pulses maintains the selected bunch on axis at the required repetition rate. This original principle, named “inverted duty cycle”, was chosen to provide reasonable power requirement for the pulse generators, high rejection of the side bunches, and safe operation for the experimental target. This paper gives an overview of the whole system, recalls the main component design issues and performances and reports the successful commissioning results with the first 0.2 and 5 mA proton beams.
ISSN:1748-0221
1748-0221
DOI:10.1088/1748-0221/15/12/T12011