Extremely short and intense bursts of X-rays, light or electrons can be obtained from a recently developed electron accelerator. Thus high-speed photography is made more versatile since the type of radiation which best portrays a particular event can be selected. The basic system, from which the electron beam can be extracted for direct use or converted into an intense pulse of X-rays by bremsstrahlung, was described at the 8th Congress of High-Speed Photography; since that time light generating capability has been added by the development of semiconductor targets which convert the electron beam energy into Super Radiant Light (SRL).
John L. Brewster,
John P. Barbour,
F. M. Charbonnier,
F. J. Grundhauser,
"Nanosecond Photography With Super Radiant Light," Optical Engineering 8(5), 805179 (1 July 1970). https://doi.org/10.1117/12.7971532