Beam center shifts caused by vertical focusing

Leo D. Cussen

doi:10.1117/12.454820

18 November 2002 Beam center shifts caused by vertical focusing

Leo D. Cussen

Proceedings Volume 4785, Advances in Neutron Scattering Instrumentation; (2002) https://doi.org/10.1117/12.454820
Event: International Symposium on Optical Science and Technology, 2002, Seattle, WA, United States

Abstract

Vertically "focussed" monochromators are widely used on neutron scattering instruments. As scientists search to improve instrument performance, there has been a trend to increasing the vertical height of monochromators. Vertical focussing shifts the centre of intensity of the beam horizontally in a systematic way. With large monochromators the shift becomes large. While the effect is simple to explain, it is less widely appreciated than it should be. This work presents equations describing the shifts.

Citation Download Citation

Leo D. Cussen "Beam center shifts caused by vertical focusing", Proc. SPIE 4785, Advances in Neutron Scattering Instrumentation, (18 November 2002); https://doi.org/10.1117/12.454820

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