Author:Roos, TH; Zwane, NX; Kruger, E; Perumal, S; Cathro, RDate:Sep 2007A 252m target-aligned research heliostat with closed-loop control, with a theoretical concentration of 80 suns, has been built at CSIR in South Africa. The heliostat has four degrees of freedom: Azimuth, Elevation, Rotation and Pitch. A control ...Read more