Electron tube in which high-frequency electromagnetic waves are generated and increased through the energy exchange between an electron beam and standing electric fields.

Safety related standard of the Nuclear Safety Standards Commission (KTA) on requirements on the handbook. This standard must be applied to content, structure, design, and development of the inspection list and the inspection instructions listed therein, jointly summarised in the handbook, of a stationary nuclear power plant. It applies to all periodic inspections of the systems specified in the nuclear licensing procedure that are important with regard to safety, and to their components and equipments.