Irradiating device with an electronic accelerator

An irradiating device has an electronic accelerator, an actuating and monitoring device, means for expanding and homogenizing the electronic ray with respect to electron density and a diaphragm for side limiting the electronic beam. The invention is particularly characterized by the provision of a measuring device containing several radiation detectors connected to the actuating and monitoring device for increasing the operational safety of the irradiating device and located in the electronic beam in the ray direction behind the means for expanding and homogenizing the electronic beam. At least the first of these radiation detectors is located in the angular space range of the unscattered electronic ray