FIELD: thermoionic method for heat-to-electricity conversion. SUBSTANCE: insert of two thin fissionable-material pellets of thickness that may be chosen from expression δ ≥ 0,6λ, where l is free-path length of neutrons in fissionable material of pellets, is placed between two adjacent calorimeters of integral heat flux accommodating fuel-emitter assembly of electricity generating element of thermoionic assembly model. EFFECT: improved design. 2 cl, 1 dwg
