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CHRNS VSANS

NSF: Very Small Angle Neutron Scattering (VSANS)

 

Neutron spin filters can be applied to measurements requiring different field orientations. The schematic shown above illustrates the use of NSFs on the 30m SANS and Very Small Angle Neutron Scattering (VSANS) instruments. In this example, the NSF is the analyzer for a polarized beam measurement with a horizontal field. For more details, please select the provided links for general {Gentile05, Gentile00} and specific {Chen09, Krycka09} applications. All SANS publications using NSFs can be found here.

Neutron Polarization Analysis with Kathryn Krycka (mp4 format)

Powerpoint slide provided for presentation use: Neutron Spin Filters on SANS

 

Specifications for NSFs on VSANS
NSF Low Field Setup
NSF Low Field Setup
  • 3He polarization flipping capability
  • Standard wavelengths: \({\lambda}\) = 5 \({\unicode{x212B}}\) or 6 \({\unicode{x212B}}\)
  • Measurable Q range: 0.015 \({\unicode{x212B}}\)-1 - 0.12 \({\unicode{x212B}}\)-1
  • Sample field: H \({\leq}\) 0.1 T
  • Four cross-section polarization correction
  • 3He transmission: \({\leq}\) 54% (for desired state)
  • Flipping ratio: \({\leq}\) 90
  • Low Field Setup.pdf
  • Manifold sample holder (up to 3 samples simul.)
NSF High Field (EM) Setup
NSF High Field (EM) Setup
  • 3He polarization flipping capability
  • Standard wavelengths: \({\lambda}\) = 5 \({\unicode{x212B}}\) or 6 \({\unicode{x212B}}\)
  • Measurable Q range: 0.015 \({\unicode{x212B}}\)-1 - 0.12 \({\unicode{x212B}}\)-1
  • Sample field: H \({\leq}\) 1.6 T
  • Four cross-section polarization correction
  • 3He transmission: \({\leq}\) 54% (for desired state)
  • Flipping ratio: \({\leq}\) 90
  • High Field Setup.pdf
  • Manifold sample holder (up to 3 samples simul.)

 

Contacts

SPIN FILTERS

Created June 10, 2019, Updated October 1, 2021