On the possibility of footprint compression with one lens in nonlinear accelerator lattice. (31st March 2021)

• Record Type: Journal Article
• Authors: Danilov, V.; Shiltsev, V.
• Is Part Of: Journal of instrumentation. Volume 16:Number 3(2021)
• Publication Date: 2021-03-31
• Subjects: Accelerator modelling and simulations (multi-particle dynamics -- single-particle dynamics) -- Beam dynamics -- Instrumentation for particle accelerators and storage rings - high energy (linear accelerators, synchrotrons); Scientific apparatus and instruments -- Periodicals; 502.84
• DOI: 10.1088/1748-0221/16/03/P03050
• Languages: English
• ISSNs: 1748-0221

Abstract

Abstract: Electromagnetic interaction of colliding beams along with other nonlinear fields often limits the beams' lifetimes and luminosities. Nonlinearities result in the spread of betatron frequencies (footprint) and, thus, may enhance dynamic diffusion of particles due to high order resonances. One of the possible ways to eliminate nonlinearities and overcome the corresponding difficulties is compensation of nonlinear forces, but, in practice, it is hardly possible to obtain exact linearity of the system. The compensation with a single nonlinear lens cannot cope with distributed nonlinearities, nonlinearities due to parasitic crossings, etc. In the article, we present a method to compute parameters of nonlinear element (lens) that eliminates both the footprint and resonance strength without achieving full compensation.