Overview of LCLS-II Photoinjector System

ORAL

Abstract



X-ray free-electron lasers (XFELs) have transformed X-ray science through their delivery of ultrafast, coherent pulses, opening new avenues for many studies. LCLS-II enhances this capability significantly, operating at 1 MHz and increasing an average brightness by four orders of magnitude over LCLS-I. This promises profound insights into nanoscale dynamics and structural biology, single-particle imaging, and in-situ analysis. The photocathode laser system emits UV pulses that activate a photocathode within a high-field RF gun, and generate photoelectrons, which result in high average power, efficient, and superior-quality electron bunches [1]. The acceleration of these electrons is further enhanced through RF cavities and undulators, culminating in X-ray production. We will highlight the R&D achievements, focusing on areas such as laser temporal and spatial shaping, the development of visible-range responsive photocathodes, and adaptive spatial-temporal laser beam shaping [1].



[1] Zhang, Hao, et al. High Power Laser Science and Engineering 12 (2024).

*SLAC National Accelerator Laboratory, the U.S. Department of Energy, the Office of Science, Office of Basic Energy Sciences under Contract No. DE-AC02-76SF00515, No. DE-SC0022559, No. DE-SC0022464, No. DE-FOA-0002859, the National Science Foundation under Contract No. 2231334

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Publication: [1] Zhang, Hao, et al. High Power Laser Science and Engineering 12 (2024).
[2] H. Zhang, L. Sun, J. Hirschman, M. S. Shariatdoust, F. Belli, & S. Carbajo, Optimizing spectral phase transfer in four-wave mixing with gas-filled capillaries: A trade-off study. (2024). arXiv:2404.16993

Presenters

  • Hao Zhang

    • University of California, Los Angeles

Authors

  • Hao Zhang

    • University of California, Los Angeles

  • Sasha Gilevich

    • SLAC National Accelerator Laboratory

  • Alan Miahnahri

    • SLAC National Accelerator Laboratory

  • Shawn Alverson

    • SLAC National Accelerator Laboratory

  • Axel Brachmann

    • SLAC National Accelerator Laboratory

  • Joseph Duris

    • SLAC National Accelerator Laboratory

  • Paris Lee Franz

    • Stanford University

  • Alan R Fry

    • SLAC - National Accelerator Laboratory

  • Jack E Hirschman

    • Stanford University

  • Kirk Larsen

    • SLAC National Accelerator Laboratory

  • Randy A Lemons

    • SLAC National Accelerator Laboratory

  • Siqi Li

    • SLAC National Accelerator Laboratory

  • Agostino Marinelli

    • SLAC National Laboratory

  • Mikael Martinez

    • SLAC National Accelerator Laboratory

  • Justin May

    • SLAC National Accelerator Laboratory

  • Erel Milshtein

    • SLAC National Accelerator Laboratory

  • Krishna Murari

    • SLAC National Accelerator Laboratory

  • Nicole R Neveu

    • SLAC National Accelerator Laboratory

  • Joseph S Robinson

    • SLAC National Accelerator Laboratory

  • John Schmerge

    • SLAC National Accelerator Laboratory

  • Chengcheng Xu

    • SLAC National Accelerator Laboratory

  • Feng Zhou

    • SLAC National Accelerator Laboratory

  • Theodore Vecchione

    • SLAC National Accelerator Laboratory

  • Sergio Carbajo

    • University of California, Los Angeles