external exposure facility FAXITRON X-rays generator The Faxitron is a low-energy X-ray irradiation system at CEA Saclay used for controlled biological irradiation experiments. It provides X-ray exposures at a dose rate of approximately 1 Gy/min and is used for studies of DNA damage responses and cellular radiation sensitivity. The system is housed in the SBIGeM unit and is available for collaborative research projects requiring well-characterised low-LET reference irradiations. Located at CEA. website Paul Schofield