Beam shaping with 4n-order multipole magnets

8th International Particle Accelerator Conference

Folsom, B.^1,2 ; Laface, E.^1,2

Lund University, Particle Physics Division, Lund, Sweden^1

European Spallation Source ERIC, Lund, Sweden^2

关键词: Beam-shaping;    Dual-pulses;    Higher-order;    Mapping formalism;    Multipole magnets;    Octupoles;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/874/1/012071/pdf
DOI  :  10.1088/1742-6596/874/1/012071

来源: IOP

【 摘 要 】

A uniformly irradiating beam is beneficial in spallation for preventing irregular wear on the target. For octupoles (n = 4) and higher-order (n = 4N) magnets, passing charged-particle bunches undergo symmetric shaping effects along the x and y axes. Using a Lie-mapping formalism, we illustrate how well Gaussian distributions can be flattened symmetrically in 2D with single, dual-pulse, and RF magnets of 4N order. Incidental shaping effects are also discussed.