Data from LCLS-II on Photocathode Laser-based Shaping for Structured Electron Beam and X-ray Pulse Production

Dataset supporting experiments on programmable photoinjector laser shaping at the LCLS-II free-electron laser. The repository includes processed and representative single-shot measurements of the ultraviolet drive-laser waveforms and corresponding electron-beam longitudinal phase-space diagnostics acquired with S-band and X-band transverse deflecting cavities, along with associated machine metadata used for shot selection and comparison between operating conditions (including lasing-on and lasing-off cases). These data enable reproduction of the figures and analyses in the accompanying manuscript and provide a reference benchmark for source-level laser shaping and its impact on downstream beam structure and inferred X-ray temporal emission.