Here, we develop and solve a constrained optimization model to identify an integrable optics rapid-cycling synchrotron lattice design that performs well in several capacities. Our model encodes the design criteria into 78 linear and nonlinear constraints, as well as a single nonsmooth objective, where the objective and some constraints are defined from the output of Synergia, an accelerator simulator. We detail the difficulties of the 23-dimensional simulation-constrained decision space and establish that the space is nonempty. We use a derivative-free manifold sampling algorithm to account for structured nondifferentiability in the objective function. Our numerical results quantify the dependence of solutions on constraint parameters and the effect of the form of objective function.
Eldred, Jeffrey S., Larson, Jeffrey, Padidar, Misha, Stern, Eric, & Wild, Stefan M. (2022). Derivative-free optimization of a rapid-cycling synchrotron. Optimization and Engineering, 23(2). https://doi.org/10.1007/s11081-022-09733-4
@article{osti_1831981,
author = {Eldred, Jeffrey S. and Larson, Jeffrey and Padidar, Misha and Stern, Eric and Wild, Stefan M.},
title = {Derivative-free optimization of a rapid-cycling synchrotron},
annote = {Here, we develop and solve a constrained optimization model to identify an integrable optics rapid-cycling synchrotron lattice design that performs well in several capacities. Our model encodes the design criteria into 78 linear and nonlinear constraints, as well as a single nonsmooth objective, where the objective and some constraints are defined from the output of Synergia, an accelerator simulator. We detail the difficulties of the 23-dimensional simulation-constrained decision space and establish that the space is nonempty. We use a derivative-free manifold sampling algorithm to account for structured nondifferentiability in the objective function. Our numerical results quantify the dependence of solutions on constraint parameters and the effect of the form of objective function.},
doi = {10.1007/s11081-022-09733-4},
url = {https://www.osti.gov/biblio/1831981},
journal = {Optimization and Engineering},
issn = {ISSN 1389-4420},
number = {2},
volume = {23},
place = {United States},
publisher = {Springer},
year = {2022},
month = {06}}
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 757https://doi.org/10.1016/j.nima.2014.04.078
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 741https://doi.org/10.1016/j.nima.2013.12.042