CHROMATIC INDEX TO FIND A WORKING POINT FOR A 4TH GENERATION SYNCHROTRON LIGHT SOURCE

Optimizing the electron dynamics generated by MBA cells involves adjusting a large number of parameters while meeting complex constraints. These optimizations are typically performed using methods that involve calculating standard nonlinear functions, such as dynamic aperture. These methods are often computationally expensive. Recently, a quasi-invariant surface technique for optimizing nonlinear electron dynamics in storage rings has been reported. Building on this approach, a framework for optimizing the linear parameters of a lattice without the need for particle tracking, or similar nonlinear calculations, is proposed. This framework enables the definition of the distorted chromatic index ¿D,¿, a valuable function for analyzing and tuning a cell to identify a suitable working point for a machine. As an example, these techniques are applied to identify a working point for a ring model based on a 7BA cell, which comprises 20 cells and has a circumference of approximately 490 meters. After conducting nonlinear optimization, this approach achieves stable horizontal amplitudes exceeding 5 mm for momentum deviations between ¿3% and 3%. Content from this work may be used under the terms of the CC BY 4.0 licence (© 2024).

CHROMATIC INDEX TO FIND A WORKING POINT FOR A 4TH GENERATION SYNCHROTRON LIGHT SOURCE Academic Article in Scopus