CHRNS CANDOR

NSF: Chromatic Analysis Neutron Diffractometer Or Reflectometer (CANDOR)

Neutron spin filters can be applied to both specular and off-specular reflectivity measurements requiring different field orientations. The schematic shown above illustrates the use of a NSF on CANDOR. In this example, the NSF is the analyzer for a polarized beam measurement with a vertical field. The ³He analyzer may be used for P perpendicular to Q or P parallel to Q without any tuning/calibration. For more details concerning the neutron spin filter and RF spin flipper, please see the references {Chen04}, {Hassan19} and {Chen21}. For more info concerning the CANDOR instrument, please contact Alex Grutter or Brian Maranville (contact info below).

PDF slide provided for presentation use: Neutron Spin Filter on CANDOR

Specifications for NSFs on CANDOR

Credit: Wangchun Chen

3He polarization flipping capability Wavelengths: λ = 4-6 Å Obtain specular and off-specular data at all Q at one measurement Sample field: H ≤ 0.7 T Four cross-section polarization correction Initial neutron transmission: ≤ 58% - 48% (for desired state) for 4-6 Å Initial flipping ratio:   40 - 100 (expected) for 4-6 Å