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First experimental measurements of the caustic nature of trajectories in bunch compressors

Advancements in the theory describing density perturbations in accelerated charge particle beams, known as caustics, has been gathering interest over the past few years. This proceeding describes the first experimental measurements of the caustic nature of charged particle trajectories in a particle...

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Detalles Bibliográficos
Autores principales: Charles, Tessa, Björklund Svensson, Jonas, Latina, Andrea, Thorin, Sara
Lenguaje:eng
Publicado: 2019
Materias:
Acceso en línea:https://dx.doi.org/10.18429/JACoW-IPAC2019-WEYYPLS2
http://cds.cern.ch/record/2694062
Descripción
Sumario:Advancements in the theory describing density perturbations in accelerated charge particle beams, known as caustics, has been gathering interest over the past few years. This proceeding describes the first experimental measurements of the caustic nature of charged particle trajectories in a particle accelerator. Caustics by their nature are discontinuities that result from small continuous perturbations of an input. Under certain conditions, small density modulations will reliably produce striking changes in the corresponding output current profile. These current modulations can shift along the bunch with varying higher-order longitudinal dispersion. The MAX IV linac double-bend achromats provide the perfect test bed for experimentally verifying how the caustic lines evolve. The natural amplification of small perturbations makes caustics an attractive diagnostic tool, and effective tool for characterise the bunch compressors. This approach also allows us to modify and improve the longitudinal charge profile, removing current spikes or creating tailor shaped current profiles.