Design and construction of the structure of the DEMONSTRATOR of the CALIFA detector for R3B-FAIR using carbon-fiber compositesE. Casarejos, H. Alvarez-Pol, D. Cortina-Gil, I. Durán, A. Iglesias, P. Izquierdo, P. Yañez and J.A. VilánEPJ Web of Conferences, 66 (2014) 11038DOI: https://doi.org/10.1051/epjconf/20146611038