Cathodoluminescent sources in the range of ultraviolet radiation with a field emission cathode based on carbon materials

Currently, various UV lamps are widely used in various fields. For example, UV is used in laser technology, medicine, ecology, petrochemistry and other fields. Ultraviolet light sources, which are widely used today, have a number of disadvantages and limitations to achieve energy efficient lighting. Therefore, the creation of a new generation of ultraviolet radiation sources is one of the most urgent tasks of modern vacuum electronics. Recently, a new type of lamp is developed, called cathodoluminescent ultraviolet light sources based on field emission cathodes. For the development of a new generation of cathodoluminescent ultraviolet source with a field emission cathode, several promising phosphors with UV radiation with the efficiency of up to 20% and several methods of their synthesis, which affects the grain size and their efficiency, are identified. The features of an autoemission cathode made of polyacrylonitrile carbon fiber and methods for increasing its current density are also studied.