Title of article :
On the form invariant volume transformation in phase space by focusing neutron guides: An analytic treatment
Author/Authors :
A and Stüكer، نويسنده , , N. and Hofmann، نويسنده , , T.، نويسنده ,
Abstract :
Tapered guides with supermirror coating are frequently used to focus neutron beams on specimens. The divergence distribution in the focused beam is of a great importance for the quality of neutron instrumentation. Using an analytic approach we derive the tapering which is needed to achieve a form invariant phase space transformation of a rectangular phase volume. In addition we consider the effect of beam attenuation by the finite reflectivity of supermirrors.
Keywords :
neutron scattering , Neutron instrumentation , Focusing optics , Beam profiles , phase space , guides
Journal title :
Astroparticle Physics
