X-ray refractive lenses were successfully applied to harmonics rejection by using the fact that focal distance of the lens is energy-dependent. Spatial separation of energy spectrum by focusing the fundamental harmonic at the focal point and suppressing the unfocused high-energy radiation with a screen absorber or slit was achieved by usage of an off-axis illumination of refractive lenses at the ESRF ID06 beam-line. The presence of the 3^rd harmonic has been reduced down to 10^-3 using this technique and down to 10^-5 by additionally using of monochromator detuning. The method is well suited to third-generation synchrotron radiation sources and very promising at the future ultimate storage rings.

Date Published: 5 September 2014
PDF: 7 pages
Proc. SPIE 9207, Advances in X-Ray/EUV Optics and Components IX, 920711 (5 September 2014); doi: 10.1117/12.2060534

Published in SPIE Proceedings Vol. 9207:
Advances in X-Ray/EUV Optics and Components IX
Christian Morawe; Ali M. Khounsary; Shunji Goto, Editor(s)