Frequency analysis and dynamic aperture studies in ELENA with realistic 3D magnetic fields

TL;DR

This paper presents a novel algorithm for long-term 4D particle tracking in static electromagnetic fields, applied to frequency analysis and dynamic aperture studies in ELENA, considering realistic magnetic geometries without multipole errors.

Contribution

Introduction of a new algorithm, SIMPA, for accurate long-term particle tracking in arbitrary static fields, applied to realistic ELENA magnetic configurations.

Findings

Dynamic aperture influenced by end fields and magnetic system perturbations.

No multipole errors introduced; results depend solely on magnetic geometry.

Suggestions provided to reduce beam losses during deceleration.

Abstract

We briefly present recent progress with our algorithm and its implementation called SIMPA described in a previous paper. The algorithm has a new and unique approach to long-term 4D tracking of charged particles in arbitrary static electromagnetic fields. Using the improvements described in this paper, we made frequency analysis and dynamic aperture studies in ELENA. The effect of the end fields and the perturbation introduced by the magnetic system of the electron cooler on dynamic aperture is shown. A special feature of this study is that we have not introduced any multipole errors into the model. The dynamic aperture calculated in this paper is the direct consequence of the geometry of the magnetic elements. Based on the results, we make a few suggestions to reduce the losses during the deceleration of the beam.