Split or unsplit electron beams?

TL;DR

This paper explores innovative methods for splitting or maintaining electron beams in synchrotron light sources using nonlinear effects, stable phase space islands, and AC dipoles, supported by detailed simulations.

Contribution

It introduces new techniques for beam splitting in synchrotron light sources leveraging stable phase space islands and AC dipoles, expanding the application of nonlinear effects.

Findings

Successful numerical simulations demonstrate beam splitting using stable islands.

AC dipoles can generate periodic closed orbits for beam control.

Proposed methods have potential applications in advanced beam manipulation.

Abstract

Non-linear effects have become increasingly relevant in modern circular particle accelerators, and in recent years a change of paradigm has appeared, the attitude towards nonlinear effects having shifted from fighting them to exploiting them with the goal of devising new beam manipulations, such as the splitting of the beam in the transverse phase space by crossing a stable resonance. In the field of hadron accelerators, well-established operational techniques based on nonlinear effects exist, whereas for the case of synchrotron light sources these new techniques are only beginning their way into the field. In this paper, we discuss novel techniques aimed at providing split beams in synchrotron light sources that are obtained by using stable islands in the transverse phase space or unsplit beams with AC dipoles to generate periodic closed orbits. The results of detailed numerical simulations, which support the proposed methods, are presented and discussed in this paper, together with possible applications.