Dylan Kennedy (SLAC National Accelerator Laboratory)
THPB066
Autonomous beam alignment through quadrupole triplets using Bayesian Algorithm Execution
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A common challenge in online accelerator operations is aligning beams through a series of quadrupole magnets, especially when in situ beam position monitors are not present. Accelerator operators generally use a trial-and-error approach to solve this problem by sequentially measuring the centroid deflection of the beam as a function of quadrupole strengths. This is a challenging process that necessitates dedicated effort by operational experts, requiring significant beam time and personnel resources to configure basic accelerator operations. In this work, we use Bayesian Algorithm Execution (BAX) with virtual objectives to autonomously control steering magnets at the Argonne Wakefield Accelerator to center the beam through a quadrupole triplet. This technique uses virtual objectives to reduce the number of measurements needed to converge to an optimal solution, resulting in a turn-key algorithm for finding the optimal steering configuration for a set of accelerator magnets from scratch.
  • R. Roussel, D. Kennedy, A. Edelen
    SLAC National Accelerator Laboratory
  • E. Wisniewski
    Illinois Institute of Technology
  • A. Ody
    Argonne National Laboratory
Paper: THPB066
DOI: reference for this paper: 10.18429/JACoW-LINAC2024-THPB066
About:  Received: 20 Aug 2024 — Revised: 29 Aug 2024 — Accepted: 30 Aug 2024 — Issue date: 23 Oct 2024
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THPB067
Updates to Xopt for online accelerator optimization and control
The recent development of advanced black box optimization algorithms has promised order of magnitude improvements in optimization speed when solving accelerator physics problems. These algorithms have been implemented in the python package Xopt, which has been used to solve online and offline accelerator optimization problems at a wide number of facilities, including at SLAC, Argonne, BNL, DESY, ESRF, and others. In this work, we describe updates to the Xopt framework that expand its capabilities and improves optimization performance in solving online optimization problems. We also discuss how Xopt has been incorporated into the Badger graphical user interface that allows easy access to these advanced control algorithms in the accelerator control room.
  • R. Roussel, D. Kennedy, T. Boltz, C. Mayes, A. Edelen
    SLAC National Accelerator Laboratory
  • K. Baker
    Science and Technology Facilities Council
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