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Demonstration of a code coupling framework for modeling beam-collimator impacts in the advanced photon source

A. J. Dick*, J. Dooling, M. Borland, G. Navrotksi, and Y. Lee

S. Riedel and D. Lee

N. Cook

  • *Contact author: ajdick@anl.gov
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Phys. Rev. Accel. Beams 28, 123001 – Published 22 December, 2025

DOI: https://doi.org/10.1103/6k9x-xxr6

Abstract

The high-brightness beams being produced in current and future accelerators present new machine protection concerns with the potential for high-energy-density (HED) conditions (>100  J/mm3) in beam-intercepting components. Simulating HED conditions in accelerators requires utilizing a suite of physics codes for particle dynamics, particle-matter interactions, and hydrodynamics. This paper describes a method of coupling the codes elegant, fluka, and flash to simulate the effects of a rapid beam loss in the advanced photon source storage ring and the resulting interaction of the beam and collimators. This paper expands previous work [J. Dooling et al., Collimator irradiation studies at the advanced photon source, in Proceedings of the IBIC-2023 (2023), pp. 245–249] by introducing a definition of the evolving geometry of the collimator surface as well as providing methods for simulating the absorption of synchrotron radiation and tracking shower particles produced during beam strikes. We demonstrate this framework by simulating machine conditions of the APS ring before and after its recent upgrade. Simulation results are compared with observed damage to collimators and test samples taken from the APS ring.

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Phys. Rev. Accel. Beams 28, 123001– Published 22 December, 2025
  • Received 21 March 2025
  • Accepted 25 September 2025
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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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