Abstract
Smart radiation device (SRD), that is a variable emittance radiator, has been developed as thermal control material for the spacecraft. The hemispherical total emittance ε_H of the SRD controls depending on its temperature. The device is required to improve for the variation of the hemispherical total emittance ⊿ε_H and solar absorptance α_s. This paper presents the ε_H and α_s design of the SRD with spectral selective multilayer films. The optimum design of the new multilayer film is composed by the calculation method based on the genetic algorithm (GA). The GA enables to design the optimal sequence of the materials along with thickness and layers number.
