High energy synchrotron X-ray focusing by fixed exit bender

The performance of sagittal focusing for hard X-rays with a cylindrical ben t crystal at SPring-8 is described. This bending mechanism is designed for the SPring-8 standard double crystal monochromator of bending-magnet beamli nes. Therefore, a fixed height exit for a wide energy range (5 - 150 keV) i s required. The results underline that focusing in a wide energy band was a chieved by combining an adjustable inclined double crystal monochromator an d a fixed height exit bending mechanism. The monochromator was maintained a t a constant focus at the sample position by optimizing the bent crystal in the energy range from 60 to 150 keV. (C) 2001 Elsevier Science B.V. All ri ghts reserved.