X-ray harmonics rejection on third-generation synchrotron sources using compound refractive lenses.
A new method of harmonics rejection based on X-ray refractive optics has been proposed. Taking into account the fact that the focal distance of the refractive lens is energy-dependent, the use of an off-axis illumination of the lens immediately leads to spatial separation of the energy spectrum by focusing the fundamental harmonic at the focal point and suppressing the unfocused high-energy radiation with a screen absorber or slit. The experiment was performed at the ESRF ID06 beamline in the in-line geometry using an X-ray transfocator with compound refractive lenses. Using this technique the presence of the third harmonic has been reduced to 10(-3). In total, our method enabled suppression of all higher-order harmonics to five orders of magnitude using monochromator detuning. The method is well suited to third-generation synchrotron radiation sources and is very promising for the future ultimate storage rings.
National Research Nuclear University `Mephi', 31 Kashirskoe Shosse, 115409 Moscow, Russian Federation.
Maxim
M
Polikarpov
European Synchrotron Radiation Facility, 6 rue Jules Horowitz, 38043 Grenoble, France.
Irina
I
Snigireva
European Synchrotron Radiation Facility, 6 rue Jules Horowitz, 38043 Grenoble, France.
Anatoly
A
Snigirev
D016477:Artifacts; D004867:Equipment Design; D019544:Equipment Failure Analysis; D007909:Lenses; D012031:Refractometry / Q000295:instrumentation*; D012542:Scattering, Radiation; D017356:Synchrotrons / Q000295:instrumentation*; D014965:X-Rays
X-ray refraction; X-ray refractive lenses; focusing; harmonic suppression