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@inproceedings{fujii:ipac2022-mopopt034, author = {H. Fujii and N. Fukunishi and M. Yamakita}, title = {{Surrogate-Based Bayesian Inference of Transverse Beam Distribution for Non-Stationary Accelerator Systems}}, booktitle = {Proc. IPAC'22}, % booktitle = {Proc. 13th International Particle Accelerator Conference (IPAC'22)}, pages = {324--327}, eid = {MOPOPT034}, language = {english}, keywords = {controls, experiment, beam-transport, framework, simulation}, venue = {Bangkok, Thailand}, series = {International Particle Accelerator Conference}, number = {13}, publisher = {JACoW Publishing, Geneva, Switzerland}, month = {07}, year = {2022}, issn = {2673-5490}, isbn = {978-3-95450-227-1}, doi = {10.18429/JACoW-IPAC2022-MOPOPT034}, url = {https://jacow.org/ipac2022/papers/mopopt034.pdf}, abstract = {{Constraints on the beam diagnostics available in real-time and time-varying beam source conditions make it difficult to provide users with high-quality beams for long periods without interrupting experiments. Although surrogate model-based inference is useful for inferring the unmeasurable, the system states can be incorrectly inferred due to manufacturing errors and neglected higher-order effects when creating the surrogate model. In this paper, we propose to adaptively assimilate the surrogate model for reconstructing the transverse beam distribution with uncertainty and underspecification using a sequential Monte Carlo from the measurements of quadrant beam loss monitors. The proposed method enables sample-efficient and training-free inference and control of the time-varying transverse beam distribution.}}, }