A double supermirror monochromator for neutron instrumentation at LLB

Sylvain Desert (1) , Vincent Thevenot (1) , Andre Gabriel (1) , Patrice Permingeat (1) , Julian Oberdisse (1, 2) , Annie Brulet (1)

1 LLB - UMR 12 - Laboratoire Léon Brillouin
2 LCVN - Laboratoire des colloïdes, verres et nanomatériaux

The design and characteristics of a double supermirror monochromator for neutron instrumentation at the Laboratoire Leon Brillouin is described. The aim of this monochromator is to reduce the intense gamma-radiation produced by conventional velocity selectors and to avoid a direct view of the guide while keeping a comparable neutron transmission (higher than 70%). The monochromator offers a continuous choice of wavelength selection in the range 0.5 to 2 nm.

Mots clés: Small Angle Neutron Scattering; USANS

Domaines: Matière Molle [cond-mat.soft]; Instrumentations et Détecteurs [physics.ins-det]

Sylvain Desert, Vincent Thevenot, Andre Gabriel, Patrice Permingeat, Julian Oberdisse, et al.. A double supermirror monochromator for neutron instrumentation at LLB. Journal of Applied Crystallography, 2007, 40, pp.945-949. ⟨10.1107/S0021889807034863⟩. ⟨hal-00180464⟩