A high‐speed X‐radiographic camera to radiograph blowoff products from materials subjected to high‐energy deposition by pulsed electron beams is described. Information obtained is average material density as a function of time and distance from the sample surface and is used to improve predictive hydrodynamic models. The camera design overcomes the difficult diagnostic problems of intense background radiation (bremsstrahlung), scattered electrons and electromagnetic interference usually associated with the electron beam environment. Conventional x‐ray film is mounted on a disk which rotates inside of a shielded housing. Data are recorded through a slit in the housing near the edge of the film disk (polar coordinate geometry) in either a flash (framing) or continuous (streak) mode. X‐ray energies used were 20–30 keV. Maximum speed of the film past the slit is approximately 0.04 cm/&mgr;sec.