Photometry of ionizing radiations

Possibility to develop telemetry system for remote control of radiation environment in the preset points in space was examined and practically implemented. The system is based on the capability of certain media to emit visible-light photons under ionizing radiation. Dedicated high-aperture low-noise detector of photons operated within visual wavelength range allowing selective registration of light from the preset point is space was developed. Photon detector was developed on the basis of large-size paraboloid mirror and photomultiplier tube with cooled photocathode. Studies of luminosity of air, quartz glass, plexiglass and water under irradiation with alpha particles, beta particles and gamma quanta were performed using the developed equipment. It was demonstrated that the developed installation is capable to ensure remote detection of ionizing radiation with comparatively low dose rates. The best sensitivity of the installation during operation using air as the passive radiator was achieved under irradiation with alpha and beta particles. It is recommended to use radiators made of quartz glass and plexiglass for registration of gamma radiation. The main advantages of the system are the absence of cable communication lines between sensors and the light detection device, simplicity and reliability of the sensor, its high radiation resistance, expediency of the implemented control and possibility to simultaneously control several points inside the controlled premises. The developed installation can be useful for evaluation of radiation situation at facilities utilizing nuclear technologies both in normal operation conditions and during emergency situations accompanied with leakages of radioactive substances.