|MOPGW051||Diffusion Map Analysis in High Energy Storage Ring Based e+/e− Collider||203|
|SUSPFO074||use link to see paper's listing under its alternate paper code|
Funding: Project 11775238 supported by NSFC
In a very high energy e+/e− storage ring collider, e.g. Circular Electron Positron Collider (CEPC), the dynamic aperture is limited by the strong synchrotron radiation especially in the vertical direction. Some tracking results also shows that the beam lifetime does not correspond well to the dynamic aperture. Here we develop a method called diffusion map analysis, aiming to describe the beam distribution diffusion in transverse amplitude space by tracking less turns. The diffusion may come from quantum fluctuation of SR, beamstrahlung effect and nonlinearity. Comparing cases with different configuration of sextupoles, the diffusion map analysis presents good consistency with beam lifetime that needs much more turns of tracking. Constraints based on the diffusion map is applied to our dynamic aperture optimization, which could help us achieve enough long beam lifetime.
|DOI •||reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-MOPGW051|
|About •||paper received ※ 14 May 2019 paper accepted ※ 20 May 2019 issue date ※ 21 June 2019|
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