Abstract
A system has been created for extracting and transporting light radiation from the irradiation chamber and the protective box of the INURA accelerator. Light outside the protective box is recorded using compact spectrometers, photomultipliers, photodetectors in the range from 300 nm to 2.1 µm. At present, the accelerator operates in the ion acceleration mode; the number of problems to be solved should increase when switching to the electron acceleration mode. The system was tested in the registration of light radiation from the interelectrode gap of the diode assembly. Lines of a hydrogen atom and an oxygen atom associated with the decomposition of absorbed water vapor and the discharge over the dielectric surface at the anode of the high-current accelerator diode have been registered.