Isotope Separator On-Line system tuning: Bayesian optimization applied to the transport beamline case

IF 1.4 3区物理与天体物理 Q3 INSTRUMENTS & INSTRUMENTATION

Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms Pub Date : 2025-09-16 DOI:10.1016/j.nimb.2025.165859

Santiago Ramos Garces , Line Le , Mia Au , Alexander Schmidt , João Pedro Ramos , Marc Dierckx , Dinko Atanasov , Ivan De Boi , Sebastian Rothe , Lucia Popescu , Stijn Derammelaere

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引用次数: 0

Abstract

Optimizing Isotope Separation On-Line (ISOL) systems requires tuning to find the best values for many correlated parameters, traditionally performed by experienced operators. This process is time-consuming and often suboptimal due to the large number of parameters involved. Optimization algorithms have emerged as valuable tools to support the tuning process, although their application has primarily focused on accelerators. This paper presents experimental results on optimizing the transport beamline of the ISOLDE Offline 2 mass separator system at CERN. Instead of formulating beamline tuning as a multi-objective optimization problem, performance objectives are modeled as constraints, thereby reducing the problem to a single-objective constrained optimization. The results indicate that Bayesian optimization-based algorithms successfully identified beamline parameters that meet mass separation requirements at the specified resolution. Additionally, the findings validate the use of a Bayesian optimization algorithm with a data-informed Gaussian process, which consistently improves convergence and outperforms benchmark algorithms.

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同位素分离器在线系统调谐：贝叶斯优化应用于输运束线情况

优化同位素在线分离（ISOL）系统需要对许多相关参数进行调整，以找到最佳值，传统上由经验丰富的操作人员执行。由于涉及大量参数，这个过程非常耗时，而且常常不是最优的。优化算法已经成为支持调优过程的宝贵工具，尽管它们的应用主要集中在加速器上。本文介绍了欧洲核子研究中心（CERN） ISOLDE脱机2号质量分离器系统输运束线优化的实验结果。将性能目标建模为约束，而不是将波束线调优表述为多目标优化问题，从而将问题简化为单目标约束优化。结果表明，基于贝叶斯优化的算法成功地识别出了在指定分辨率下满足质量分离要求的光束线参数。此外，研究结果验证了贝叶斯优化算法与数据知情高斯过程的使用，该算法不断提高收敛性并优于基准算法。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms 物理-核科学技术

CiteScore

2.80

自引率

7.70%

发文量

231

审稿时长

1.9 months

期刊介绍： Section B of Nuclear Instruments and Methods in Physics Research covers all aspects of the interaction of energetic beams with atoms, molecules and aggregate forms of matter. This includes ion beam analysis and ion beam modification of materials as well as basic data of importance for these studies. Topics of general interest include: atomic collisions in solids, particle channelling, all aspects of collision cascades, the modification of materials by energetic beams, ion implantation, irradiation - induced changes in materials, the physics and chemistry of beam interactions and the analysis of materials by all forms of energetic radiation. Modification by ion, laser and electron beams for the study of electronic materials, metals, ceramics, insulators, polymers and other important and new materials systems are included. Related studies, such as the application of ion beam analysis to biological, archaeological and geological samples as well as applications to solve problems in planetary science are also welcome. Energetic beams of interest include atomic and molecular ions, neutrons, positrons and muons, plasmas directed at surfaces, electron and photon beams, including laser treated surfaces and studies of solids by photon radiation from rotating anodes, synchrotrons, etc. In addition, the interaction between various forms of radiation and radiation-induced deposition processes are relevant.