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Figure 1
Schematics of the SESANS (a) and SEMSANS (b) setups using magnetic WPs, with the average wavevectors of the two neutron spin states denoted by arrows. The constant magnetic field in which the WPs are embedded is along the y direction and the incident neutrons are polarized in this direction. Fields inside the WPs are along either z or −z, as indicated in the figures. The symbols [\Uparrow] and [\Downarrow] indicate eigenstates of the Sz spin operator. At an interface of magnetic field reversal, each of the two spin states will be flipped. For SEMSANS, the final magnetic field boundary of the second WP acts as a [\pi/2] spin flipper, after which only the projection of the polarization vector along the y direction can be preserved. For SEMSANS, the spatial oscillation of the measured intensity on the detector with (A) and without (A0) sample is denoted as dashed and solid curves, respectively, and p is the spatial oscillation period.

Journal logoJOURNAL OF
APPLIED
CRYSTALLOGRAPHY
ISSN: 1600-5767
Volume 49| Part 1| February 2016| Pages 55-63
doi:10.1107/S1600576715021573
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