Magnetised foils as π-flippers in spin-echo spectrometry
M.T. Rekveldt (TU Delft - RST/Neutron and Positron Methods in Materials)
Wim Bouwman (TU Delft - RST/Neutron and Positron Methods in Materials)
Wicher Kraan (TU Delft - RST/Neutron and Positron Methods in Materials)
S. V. Grigoriev (External organisation)
J Plomp (TU Delft - RID/TS/Instrumenten groep)
O Uca (TU Delft - Old - Section Neutron scattering / Mossbauerspectroscopy)
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Abstract
The use of π-flippers for correction of line integrals in Larmor-precession devices is described. The π-flippersconsist of magnetised foils of the proper thickness, magnetised by the field of the precession device itself. Application of such π-flippers in a spin-echo small angle neutron scattering set-up with fields perpendicular and parallel to the beam direction is discussed. It appears that such flippers avoid corrections for the inhomogeneity of the field-line integrals, for the main part, in both options.
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