FIELD: energy conversion by thermal emission. SUBSTANCE: invention can be used for laboratory testing of converters and for reactor testing of electricity generating assemblies. In accordance with invention source of cesium vapor for thermal emission converter has case with heated evaporation zone that carries liquid phase of cesium. Cesium chloride or fluoride which concentration is between 10-4 and 10-3 of atomic per cent is added into cesium. EFFECT: prolonged operational life of thermal emission converter. 1 dwg
