Accurate and confident prediction of electron beam longitudinal properties using spectral virtual diagnostics
Open Access
- 3 February 2021
- journal article
- research article
- Published by Springer Science and Business Media LLC in Scientific Reports
- Vol. 11 (1), 1-10
- https://doi.org/10.1038/s41598-021-82473-0
Abstract
Longitudinal phase space (LPS) provides a critical information about electron beam dynamics for various scientific applications. For example, it can give insight into the high-brightness X-ray radiation from a free electron laser. Existing diagnostics are invasive, and often times cannot operate at the required resolution. In this work we present a machine learning-based Virtual Diagnostic (VD) tool to accurately predict the LPS for every shot using spectral information collected non-destructively from the radiation of relativistic electron beam. We demonstrate the tool’s accuracy for three different case studies with experimental or simulated data. For each case, we introduce a method to increase the confidence in the VD tool. We anticipate that spectral VD would improve the setup and understanding of experimental configurations at DOE’s user facilities as well as data sorting and analysis. The spectral VD can provide confident knowledge of the longitudinal bunch properties at the next generation of high-repetition rate linear accelerators while reducing the load on data storage, readout and streaming requirements.Funding Information
- Department of Energy (DE-AC02-76SF00515)
This publication has 39 references indexed in Scilit:
- Observation of Shot Noise Suppression at Optical Wavelengths in a Relativistic Electron BeamPhysical Review Letters, 2012
- First lasing and operation of an ångstrom-wavelength free-electron laserNature Photonics, 2010
- An analytic formalism for the emission of coherent transition radiation from an oblique finite thin metallic target screenNuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 2007
- Image Quality Assessment: From Error Visibility to Structural SimilarityIEEE Transactions on Image Processing, 2004
- Coherent off-axis undulator radiation from short electron bunchesPhysical Review Special Topics - Accelerators and Beams, 2000
- Measurement of the longitudinal asymmetry of a charged particle bunch from the coherent synchrotron or transition radiation spectrumPhysical Review E, 1994
- Determination of a charged-particle-bunch shape from the coherent far infrared spectrumPhysical Review E, 1994
- Gerchberg–Saxton and Yang–Gu algorithms for phase retrieval in a nonunitary transform system: a comparisonApplied Optics, 1994
- Iterative constrained deconvulutionSignal Processing, 1991
- On the Determination of the Phase of a Fourier Integral, IIProceedings of the American Mathematical Society, 1957