FM0 Completed!

The first NuSTAR optics module (“FM0”) completed on 2010 August 5. NuSTAR will fly two optics units, each with 133 layers of grazing incidence optics. Using epoxy and graphite spacers, the layers are built up, approximately one layer per day, on a CNC (computed numerically controlled) lathe assembly machine at Columbia University’s Nevis Laboratory. The inner 66 layers are comprised of 6 segments with 12 pieces of glass per layer, while the outer 67 layers are comprised of 12 segments with 24 pieces of glass per layer. Each unit is 47.2 cm (18.6 inches) long, 19.1 (7.5 inches) cm in diameter and weighs 31 kg (69 pounds). In reflection: Todd Decker.