Exploratory Research on Radioisotope Thermoelectric Generators for Deep Space Missions D. Freis, J.F. Vigier, K. Popa, T. Wiss, J.-C. Griveau, E. D’Agata and J. Somers E3S Web Conf., 16 (2017) 05001 Published online: 23 May 2017 DOI: 10.1051/e3sconf/20171605001