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The Center for Bright Beams, A National Science Foundation Science and Technology Center

Machine Learning-based live optimization of accelerators

Machine Learning-based live optimization of accelerators

The complexity of tuning particle accelerators, with their diverse components and sometimes complicated beam dynamics, makes tuning an obvious, but challenging target for machine learning techniques. 

Recently, CBB student Lucy Lin applied machine learning techniques to cooling at RHIC at BNL (LEReC). A specialized Bayesian optimization algorithm maximizes the cooling rate using a high-dimensional surrogate model trained on LEReC system simulator data. In tests, this system, which was developed in a collaboration between CBB and BNL, has automatically tuned beams to the orbit that maximizes cooling.  This success makes full integration with the RHIC control system very promising.

This is just one of several CBB efforts to apply machine learning to accelerator tuning.  Other target accelerators include HiReS at LBL, the Cornell Electron Storage Ring, Argonne’s AWA, and UCLA’s PEGASUS.  As illustrated in the figure, the accelerators under study span a wide range of parameters and goals, affording an opportunity to probe the bounds of applicability of artificial intelligence techniques to the manipulation of beams.

References:

Y. Gao, W. Lin, K. A. Brown, X. Gu, G. H. Hoffstaetter, J. Morris, and S. Seletskiy  Phys. Rev. Accel. Beams 25, 014601 (2022) [Online] Available: https://journals.aps.org/prab/abstract/10.1103/PhysRevAccelBeams.25.014601; A. Scheinker, F. Cropp, S. Paiagua, D. Filippetto Phys. Rev. Accel. Beams 2102,10510 (2021) [Online] Available: arXiv:2102.10510 ; R. Roussel, J. P. Gonzalez-Aguilera, Y. K. Kim, E. Wisniewski, W. Liu, P. Piot, J. Power, A. Hanuka, A. Edelen Nature Comm. 12, 5612 (2021) [Online] Available: https://www.nature.com/articles/s41467-021-25757-3; W. F. Bergan, I. V. Bazarov, C. J. R. Duncan, D. B. Liarte, D. L. Rubin, and J. P. Sethna  Phys. Rev. Accel. Beams 22, 054601 (2019) [Online] Available: https://journals.aps.org/prab/abstract/10.1103/PhysRevAccelBeams.22.054601; E. Cropp, P. Denham, J. Giner Navarro, E. Liu, P. Musumeci, N. Burger, L. Phillips, A. Edelen NAPAC’19/frxba4 [Online] Available: https://accelconf.web.cern.ch/napac2019/doi/JACoW-NAPAC2019-FRXBA4.html

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