A bent neutron comb monochromator

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Abstract
A new type of curved neutron monochromator is being developed, called a comb monochromator, due to its shape. The curvature is approximated by polygonisation. In consequence, the intrinsic crystal properties are not changed, the luminosity is decoupled from the focusing geometry. Several experiments with gamma rays and neutrons for testing a Cu comb show favourable results. By neutron measurements the authors found a peak reflectivity of 65% and short wings in the diffraction pattern. The FWHM is not affected seriously by bending. This type of monochromator is profitable in diffuse scattering investigations.