Uncertainty Quantification for Virtual Diagnostic of Particle Accelerators

Abstract

Virtual Diagnostic (VD) is a computational tool based on deep learning that can be used to predict a diagnostic output. VDs are especially useful in systems where measuring the output is invasive, limited, costly or runs the risk of altering the output. Given a prediction, it is necessary to relay how reliable that prediction is, i.e. quantify the uncertainty of the prediction. In this paper, we use ensemble methods and quantile regression neural networks to explore different ways of creating and analyzing prediction's uncertainty on experimental data from the Linac Coherent Light Source at SLAC National Lab. We aim to accurately and confidently predict the current profile or longitudinal phase space images of the electron beam. The ability to make informed decisions under uncertainty is crucial for reliable deployment of deep learning tools on safety-critical systems as particle accelerators.

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Cited by in corpus (5)

• 2022 Review of Data-Driven Plasma Science
• Explainable Machine Learning for Breakdown Prediction in High Gradient RF Cavities
• Virtual-Diagnostic-Based Time Stamping for Ultrafast Electron Diffraction
• Time-inversion of spatiotemporal beam dynamics using uncertainty-aware latent evolution reversal
• Adaptive Machine Learning for Time-Varying Systems: Low Dimensional Latent Space Tuning