Novel Double Triple Bend Achromat (DTBA) lattice design for a next generation 3 GeV Synchrotron Light Source

TL;DR

The paper introduces the DTBA lattice, a novel design for a 3 GeV synchrotron light source that improves space for insertion devices and optimizes beam properties through advanced lattice configurations.

Contribution

It presents the DTBA lattice, combining features of HMBA and DDBA, with detailed optimization results for beam emittance, aperture, injection efficiency, and lifetime.

Findings

Achieves ~132 pm emittance

Provides ~88% injection efficiency

Ensures 1.4 hours beam lifetime

Abstract

The Double Triple Bend Achromat (DTBA) lattice~\cite{DTBAipac16} is a novel lattice design for a next generation 3 GeV Synchrotron Light Source. Starting from a modification of the Hybrid Multi Bend Achromat (HMBA) lattice~\cite{ESRF} developed at ESRF and inspired by the Double-Double Bend Achromat (DDBA) lattice~\cite{Diamond1, Diamond2} developed at Diamond, DTBA combines the advantages of both cells. The typical MBA lattice cells have one straight section dedicated to an insertion device, whereas this new cell layout has two such drifts, thus increasing the fraction of available space for the installation of insertion devices. The DTBA lattice achieves an emittance of $\sim\mathrm{132~pm}$, a dynamic aperture of $\mathrm{\sim\pm10\pm1~mm}$ (calculated at the injection point), an injection efficiency of $\mathrm{\sim\mathrm88\pm5\%}$ and a lifetime of $\mathrm{1.4\pm0.2~h}$ with errors. The characteristics of DTBA, the methodology and results of the linear and non-linear optics optimisations, with and without the presence of errors, are presented in detail.