Approximating nonlinear forces with phase-space decoupling

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: Calculation cost;    Linear beam optics;    Multiparticle simulation;    Nonlinear effect;    Nonlinear force;    Virtual coordinates;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/874/1/012070/pdf
DOI  :  10.1088/1742-6596/874/1/012070

来源: IOP

【 摘 要 】

Beam tracking software for accelerators typically falls into two categories: fast envelope simulations limited to linear beam optics, and slower multiparticle simulations that can model nonlinear effects. To find a middle ground between these approaches, we introduce virtual coordinates in position and momentum which have a cross-dependency (i.e. p∗ = f (x0) where x0is an initial position and p∗ is a virtual projection of momentum onto the position axis). This technique approximates multiparticle simulations with a significant reduction in calculation cost.