Spin Polarized Inelastic Neutron Spectrometer (SPINS)
SPINS is part of the Center for High
Resolution Neutron Scattering (CHRNS) supported by the
National Science
Foundation. Two-thirds of its beam time is reserved for guest researcher experiments through the NCNR
proposal system.
Located on guide NG-5, SPINS operates in a number of different modes inculding conventional triple axis mode,
horizontally focusing mode, position-sensitive detector (PSD) and polarized beam mode. A vertically focusing
pyrolytic graphite (PG) monochromator produces beams with wavelengths from 2.42 to 5.84 Å. Energy resolution is in
the range of 0.02 to 1 meV, depending on incident wavelength and collimation.
A multi-crystal analyzer with 11 PG blades provides horizontal focussing capability. The focusing is fully
automated and controlled from the instrument computer. A two-dimensional position-sensitive detector (PSD) is
also available. With the multi-crystal analyzer, the PSD (20 cm × 25 cm in area) can simultaneously probe
scattering events with different momentum and energy transfer.
In the polarized beam mode of operation, supermirror transmission polarizers, consisting of a stack of single
crystal Si plates with Fe/Si supermirror coatings, are inserted in the incident and scattered beams.
| Instrument Scientists: | ||
| Sung Chang | (301) 975 8369 | sung.chang@nist.gov |
| Deepak Singh | (301) 975 4863 | dsingh@nist.gov |
