Figure 2
Sketch, with relevant dimensions, of the aluminium CRLs used here (from Adelphi Technology Inc., Palo Alto, CA, USA, https://www.adelphitech.com
). X-rays propagating through many concave walls experience convergence. For example, 60 and 86 double-concave walls of 0.5 mm radius of curvature compose a 35 m-focal-length device for 67 and 81 keV X-rays, respectively. |