Generating Ultrahigh Brilliance Quasi-monochromatic MeV gamma-Rays with High-Quality LWFA Electron Beams

By designing a cascaded laser wakefield accelerator to generate high-quality electron beams, which were bound to head-on collide with the intense driving laser pulse via reflection of a thin foil, by using the self-synchronized all-optical Compton scattering scheme, we have produced the ultrahigh brilliance MeV gamma-rays. This compact gamma-ray source may provide applications in X-ray radiology and nuclear resonance fluorescence, a pump-probe study in ultrafast science.