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Beam intensity limitations in future multibend achromat light sources

I. Agapov and S. A. Antipov

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Phys. Rev. Accel. Beams 29, 020704 – Published 13 February, 2026

DOI: https://doi.org/10.1103/5hw4-3ggc

Abstract

We show that the emittance of fourth-generation 6 GeV machines such as PETRA IV is close to what is theoretically achievable due to beam intensity limitations from space charge and intrabeam scattering. By investigating these limitations, in particular their scaling with the bare lattice emittance and the beam energy, we argue that achieving further significant emittance reduction is only possible by increasing the beam energy. We show further that electron energy increase is also the most efficient path toward higher radiation brightness.

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Phys. Rev. Accel. Beams 29, 020704– Published 13 February, 2026
  • Received 19 May 2025
  • Accepted 21 January 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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