Contact

  • Work
    xiahuang@SLAC.Stanford.EDU
    University - Staff Department: SLAC National Accelerator Laboratory Position: Senior Scientist
    • 2575 Sand Hill Rd
    • Mailstop 0069
    • Menlo Park,  California  94025 

Additional Info

  • Mail Code: 0210

All Publications

  • Bayesian optimization algorithms for accelerator physics PHYSICAL REVIEW ACCELERATORS AND BEAMS Roussel, R., Edelen, A. L., Boltz, T., Kennedy, D., Zhang, Z., Ji, F., Huang, X., Ratner, D., Garcia, A., Xu, C., Kaiser, J., Pousa, A., Eichler, A., Luebsen, J. O., Isenberg, N. M., Gao, Y., Kuklev, N., Martinez, J., Mustapha, B., Kain, V., Mayes, C., Lin, W., Liuzzo, S., John, J., Streeter, M. V., Lehe, R., Neiswanger, W. 2024; 27 (8)

    View details for DOI 10.1103/PhysRevAccelBeams.27.084801

    View details for Web of Science ID 001293205800001

  • Advanced storage ring lattice options based on hybrid six-bend achromat for Stanford Synchrotron Radiation Lightsource upgrade NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT Raimondi, P., Huang, X., Kim, J., Safranek, J., Rabedeau, T. 2024; 1061

    View details for DOI 10.1016/j.nima.2024.169137

    View details for Web of Science ID 001178427300001

  • Machine Learning for Design and Control of Particle Accelerators: A Look Backward and Forward ANNUAL REVIEW OF NUCLEAR AND PARTICLE SCIENCE Edelen, A., Huang, X. 2024; 74: 557-581

    View details for DOI 10.1146/annurev-nucl-121423-100719

    View details for Web of Science ID 001329103200008

  • Correction of storage ring optics with an improved closed-orbit modulation method PHYSICAL REVIEW ACCELERATORS AND BEAMS Huang, X., Yang, X. 2023; 26 (5)

    View details for DOI 10.1103/PhysRevAccelBeams.26.052802

    View details for Web of Science ID 001041431800002

  • Exploring the Ultrafast Charge-Transfer and Redox Dynamics in Layered Transition Metal Oxides CONDENSED MATTER Qian, G., Huang, X., Lee, J., Pianetta, P., Liu, Y. 2023; 8 (1)

    View details for DOI 10.3390/condmat8010025

    View details for Web of Science ID 000955344400001

  • Optimization method to compensate accelerator performance drifts PHYSICAL REVIEW A Zhang, Z., Song, M., Huang, X. 2022; 106 (6)

    View details for DOI 10.1103/PhysRevAccelBeams.25.122801

    View details for Web of Science ID 000921150400002

  • Case of equilibrium beam distribution dependence on storage ring nonlinearity PHYSICAL REVIEW ACCELERATORS AND BEAMS Tang, J., Huang, X. 2022; 25 (7)

    View details for DOI 10.1103/PhysRevAccelBeams.25.074002

    View details for Web of Science ID 000827648000002

  • Autoresonant excitation of nonlinear beam motion in storage rings PHYSICAL REVIEW ACCELERATORS AND BEAMS Song, M., Spentzouris, L., Huang, X., Safranek, J. 2022; 25 (7)

    View details for DOI 10.1103/PhysRevAccelBeams.25.074001

    View details for Web of Science ID 000827648000001

  • Simultaneous beam-based alignment measurement for multiple magnets by correcting induced orbit shift PHYSICAL REVIEW ACCELERATORS AND BEAMS Huang, X. 2022; 25 (5)

    View details for DOI 10.1103/PhysRevAccelBeams.25.052802

    View details for Web of Science ID 000800654700003

  • Toward fully automated UED operation using two-stage machine learning model SCIENTIFIC REPORTS Zhang, Z., Yang, X., Huang, X., Shaftan, T., Smaluk, V., Song, M., Wan, W., Wu, L., Zhu, Y. 2022; 12 (1)

    View details for DOI 10.1038/s41598-022-08260-7

    View details for Web of Science ID 000838209800024

  • Teeport: Break the Wall Between the Optimization Algorithms and Problems FRONTIERS IN BIG DATA Zhang, Z., Huang, X., Song, M. 2021; 4: 734650

    Abstract

    Optimization algorithms/techniques such as genetic algorithm, particle swarm optimization, and Gaussian process have been widely used in the accelerator field to tackle complex design/online optimization problems. However, connecting the algorithm with the optimization problem can be difficult, as the algorithms and the problems may be implemented in different languages, or they may require specific resources. We introduce an optimization platform named Teeport that is developed to address the above issues. This real-time communication-based platform is designed to minimize the effort of integrating the algorithms and problems. Once integrated, the users are granted a rich feature set, such as monitoring, controlling, and benchmarking. Some real-life applications of the platform are also discussed.

    View details for DOI 10.3389/fdata.2021.734650

    View details for Web of Science ID 000725614900001

    View details for PubMedID 34870190

    View details for PubMedCentralID PMC8636989

  • Machine-and-data intelligence for synchrotron science NATURE REVIEWS PHYSICS Li, J., Huang, X., Pianetta, P., Liu, Y. 2021

    View details for DOI 10.1038/s42254-021-00397-0

    View details for Web of Science ID 000717407400001

  • Accurate prediction of mega-electron-volt electron beam properties from UED using machine learning SCIENTIFIC REPORTS Zhang, Z., Yang, X., Huang, X., Li, J., Shaftan, T., Smaluk, V., Song, M., Wan, W., Wu, L., Zhu, Y. 2021; 11 (1): 13890

    Abstract

    To harness the full potential of the ultrafast electron diffraction (UED) and microscopy (UEM), we must know accurately the electron beam properties, such as emittance, energy spread, spatial-pointing jitter, and shot-to-shot energy fluctuation. Owing to the inherent fluctuations in UED/UEM instruments, obtaining such detailed knowledge requires real-time characterization of the beam properties for each electron bunch. While diagnostics of these properties exist, they are often invasive, and many of them cannot operate at a high repetition rate. Here, we present a technique to overcome such limitations. Employing a machine learning (ML) strategy, we can accurately predict electron beam properties for every shot using only parameters that are easily recorded at high repetition rate by the detector while the experiments are ongoing, by training a model on a small set of fully diagnosed bunches. Applying ML as real-time noninvasive diagnostics could enable some new capabilities, e.g., online optimization of the long-term stability and fine single-shot quality of the electron beam, filtering the events and making online corrections of the data for time-resolved UED, otherwise impossible. This opens the possibility of fully realizing the potential of high repetition rate UED and UEM for life science and condensed matter physics applications.

    View details for DOI 10.1038/s41598-021-93341-2

    View details for Web of Science ID 000672717300001

    View details for PubMedID 34230561

    View details for PubMedCentralID PMC8260651

  • Online accelerator optimization with a machine learning-based stochastic algorithm MACHINE LEARNING-SCIENCE AND TECHNOLOGY Zhang, Z., Song, M., Huang, X. 2021; 2 (1)

    View details for DOI 10.1088/2632-2153/abc81e

    View details for Web of Science ID 000660500300019

  • Storage ring nonlinear dynamics optimization with multi-objective multi-generation Gaussian process optimizer NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT Song, M., Huang, X., Spentzouris, L., Zhang, Z. 2020; 976

    View details for DOI 10.1016/j.nima.2020.164273

    View details for Web of Science ID 000652199800017

  • Comprehensive comparison of two tracking codes for single-particle dynamics evaluation of a next-generation storage ring light source PHYSICAL REVIEW ACCELERATORS AND BEAMS Borland, M., Sun, Y., Huang, X. 2019; 22 (11)

    View details for DOI 10.1103/PhysRevAccelBeams.22.114601

    View details for Web of Science ID 000495074100002

  • Beam dynamics issues for the two-frequency crab cavity short pulse scheme PHYSICAL REVIEW ACCELERATORS AND BEAMS Huang, X., Hettel, B., Rabedeau, T., Safranek, J., Sebek, J., Tian, K., Wootton, K. P., Zholents, A. 2019; 22 (9)

    View details for DOI 10.1103/PhysRevAccelBeams.22.090703

    View details for Web of Science ID 000488271400001

  • Robust simplex algorithm for online optimization PHYSICAL REVIEW ACCELERATORS AND BEAMS Huang, X. 2018; 21 (10)

    View details for DOI 10.1103/PhysRevAccelBeams.21.104601

    View details for Web of Science ID 000446392500002

  • Linear optics correction for linacs and free electron lasers PHYSICAL REVIEW ACCELERATORS AND BEAMS Zhang, T., Huang, X., Maxwell, T. 2018; 21 (9)

    View details for DOI 10.1103/PhysRevAccelBeams.21.092801

    View details for Web of Science ID 000443677400002

  • Off-axis injection for storage rings with full coupling PHYSICAL REVIEW ACCELERATORS AND BEAMS Zhang, T., Huang, X. 2018; 21 (8)

    View details for DOI 10.1103/PhysRevAccelBeams.21.084002

    View details for Web of Science ID 000442890200001

  • Minimization of Betatron Oscillations of Electron Beam Injected Into a Time-Varying Lattice via Extremum Seeking IEEE TRANSACTIONS ON CONTROL SYSTEMS TECHNOLOGY Scheinker, A., Huang, X., Wu, J. 2018; 26 (1): 336-343

    View details for DOI 10.1109/TCST.2017.2664728

    View details for Web of Science ID 000418095900031

  • Multi-dimensional optimization of a terawatt seeded tapered Free Electron Laser with a Multi-Objective Genetic Algorithm NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT Wu, J., Hu, N., Setiawan, H., Huang, X., Raubenheimer, T. O., Jiao, Y., Yu, G., Mandlekar, A., Spampinati, S., Fang, K., Chu, C., Qiang, J. 2017; 846: 56-63

    View details for DOI 10.1016/j.nima.2016.11.035

    View details for Web of Science ID 000394627500010

  • A method for simultaneous linear optics and coupling correction for storage rings with turn-by-turn beam position monitor data NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT Yang, X., Huang, X. 2016; 828: 97-104

    View details for DOI 10.1016/j.nima.2016.05.020

    View details for Web of Science ID 000377399700014

  • Coupled beam motion in a storage ring with crab cavities PHYSICAL REVIEW ACCELERATORS AND BEAMS Huang, X. 2016; 19 (2)

    View details for DOI 10.1103/PhysRevAccelBeams.19.024001

    View details for Web of Science ID 000379340800003

  • Feasibility study of online tuning of the luminosity in a circular collider with the robust conjugate direction search method CHINESE PHYSICS C Ji Hong-Fei, Jiao Yi, Wang Sheng, Ji Da-Heng, Yu Cheng-Hui, Zhang Yuan, Huang Xiao-Biao 2015; 39 (12)

    View details for DOI 10.1088/1674-1137/39/12/127006

    View details for Web of Science ID 000367418600016

  • Online optimization of storage ring nonlinear beam dynamics PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS Huang, X., Safranek, J. 2015; 18 (8)

    View details for DOI 10.1103/PhysRevSTAB.18.084001

    View details for Web of Science ID 000358938700002

  • An ultimate storage ring lattice with vertical emittance generated by damping wigglers NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT Huang, X. 2015; 777: 118-122

    View details for DOI 10.1016/j.nima.2014.12.097

    View details for Web of Science ID 000349468800017

  • Generation of picosecond electron bunches in storage rings JOURNAL OF SYNCHROTRON RADIATION Huang, X., Rabedeau, T., Safranek, J. 2014; 21: 961-967

    Abstract

    Approaches to generating short X-ray pulses in synchrotron light sources are discussed. In particular, the method of using a superconducting harmonic cavity to generate simultaneously long and short bunches in storage rings and the approach of injecting short bunches from a linac injector into a storage ring for multi-turn circulation are emphasized. If multi-cell superconducting RF (SRF) cavities with frequencies of ∼1.5 GHz can be employed in storage rings, it would be possible to generate stable, high-flux, short-pulse X-ray beams with pulse lengths of 1-10 ps (FWHM) in present or future storage rings. However, substantial challenges exist in adapting today's high-gradient SRF cavities for high-current storage ring operation. Another approach to generating short X-ray pulses in a storage ring is injecting short-pulse electron bunches from a high-repetition-rate linac injector for circulation. Its performance is limited by the microbunching instability due to coherent synchrotron radiation. Tracking studies are carried out to evaluate its performance. Challenges and operational considerations for this mode are considered.

    View details for DOI 10.1107/S1600577514010509

    View details for Web of Science ID 000341687000010

    View details for PubMedID 25177984

  • Nonlinear dynamics optimization with particle swarm and genetic algorithms for SPEAR3 emittance upgrade NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT Huang, X., Safranek, J. 2014; 757: 48-53

    View details for DOI 10.1016/j.nima.2014.04.078

    View details for Web of Science ID 000338348100007

  • An algorithm for online optimization of accelerators NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT Huang, X., Corbett, J., Safranek, J., Wu, J. 2013; 726: 77-83

    View details for DOI 10.1016/j.nima.2013.05.046

    View details for Web of Science ID 000323557200011

  • Lattice design and optimization for the PEP-X ultra low emittance storage ring at SLAC NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT Wang, M., Nosochkov, Y., Bane, K., Cai, Y., Hettel, R., Huang, X. 2011; 649 (1): 30-34

    View details for DOI 10.1016/j.nima.2011.01.011

    View details for Web of Science ID 000294397100011

  • Tracking study for top-off safety validation at SSRL NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT Huang, X., Bauer, J., Corbett, J., Dell'Orco, D., Hettel, B., Liu, J., Rabedeau, T., Safranek, J., Schmerge, J., Sebek, J., Tanabe, J., Terebilo, A., Wang, L. 2011; 635 (1): 13-19

    View details for DOI 10.1016/j.nima.2011.01.086

    View details for Web of Science ID 000289317100003

  • Measurement of beam lifetime and applications for SPEAR3 NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT Huang, X., Corbett, J. 2011; 629 (1): 31-36

    View details for DOI 10.1016/j.nima.2010.10.147

    View details for Web of Science ID 000287556100006

  • Lattice modeling and calibration with turn-by-turn orbit data PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS Huang, X., Sebek, J., Martin, D. 2010; 13 (11)

    View details for DOI 10.1103/PhysRevSTAB.13.114002

    View details for Web of Science ID 000284468400001

  • Low alpha mode for SPEAR3 Huang, X., Safranek, J., Corbett, J., Nosochkov, Y., Sebek, J., Terebilo, A., IEEE IEEE. 2007: 3507-3509

    View details for Web of Science ID 000255096304105

  • Simulation of ultra-short pulses in a storage ring Huang, X., IEEE IEEE. 2007: 3504-3506

    View details for Web of Science ID 000255096304104

  • A new code for Orbit Response Matrix analysis Yang, L., Lee, S. Y., Huang, X., Podobedov, B., IEEE IEEE. 2007: 2550-+

    View details for Web of Science ID 000255096303047

  • Matrix formalism of synchrobetatron coupling PHYSICAL REVIEW SPECIAL TOPICS-ACCELERATORS AND BEAMS Huang, X. 2007; 10 (1)

    View details for DOI 10.1103/PhysRevSTAB.10.014002

    View details for Web of Science ID 000244665700009