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Realization of compact permanent-magnet-based multibend-achromat lattice with magnetic crosstalk compensations

M. Aiba, M. Böge, H. Braun, C. Calzolaio, K. Dreyer, R. Ganter, P. Lerch, G. Montenero, R. Riccioli et al.

B. Riemann, S. Sanfilippo, S. Sidorov, A. Streun, V. Vranković, and C. Zoller

  • Center for Accelerator Science and Engineering, PSI, CH-5232 Villigen PSI, Switzerland

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Phys. Rev. Accel. Beams 29, 022402 – Published 25 February, 2026

DOI: https://doi.org/10.1103/tfjh-x49q

Abstract

Electron storage rings based on multibend-achromat (MBA) lattices can achieve exceptionally low natural emittances. At the Paul Scherrer Institute in Switzerland, the Swiss Light Source facility underwent an upgrade project, replacing its triple-bend achromat ring with a seven-bend achromat ring. Due to the compact nature of MBA lattices, magnetic fields can be influenced by neighboring magnets. These magnetic crosstalk effects turned out to be significant during the design phase: the integral fields of the magnets could be altered by several percent. We present how we incorporated compensations for these effects into the design and how we tuned the magnets prior to installation. The crosstalk compensations were validated through the accelerator commissioning.

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Phys. Rev. Accel. Beams 29, 022402– Published 25 February, 2026
  • Received 24 October 2025
  • Accepted 4 February 2026
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Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.

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