Accordingly, the simulation results indicate that the field integral homogeneity of main coil, V-coil, and field stepper are better than 2.91 × 10⁻⁶ T⋅m, 2.3 × 10⁻⁶ T⋅m, and 3.14 × 10⁻⁶ T⋅m, respectively. Thirdly, the finite element simulation and the testing of the magnetic field suggest that the optimized ampere-turns are 84.9, respectively. Accordingly, simulation results of the virtual spectrometer indicate that the neutron beam transmission is about 0.09 at wavelength of 0.4 nm. The length and radius of curvature of the S-Bender is set to 300 mm and 2.0 m, respectively. The bending radius of the focusing monochromator is set to 2.5 m. Secondly, the Monte Carlo simulations of the key components for determining the technical parameters are presented. Firstly, the components of the SESANS are introduced. The details of the configuration and performance of the instrument are reported along with its specifications and performance assessments in the present paper.Ĭurrent work presents the design and simulations of the spin-echo small-angle neutron scattering (SESANS) spectrometer at the 20 MW China Mianyang research reactor (CMRR)-based neutron center. Equipped with a cryostat and a furnace, HRND allows structural characterization in an extremely broad temperature range. As all the Soller slit collimators of HRND have a collimation angle of 10' and the monochromator has an average mosaicity of 0.359o, HRND obtains a best resolution of about 1.6\textperthousand based on experiments, which makes the resolution of HRND can compete with the mainstream-level high resolution neutron powder diffractometers in the world.
An array of 64 equidistant ³He filled proportional counters can acquire diffraction patterns with a large-scale diffraction angle range over 160o.
A vertical focusing Ge (511) monochromator produce a monochromatic neutron beam with a wavelength of 1.885 Å at a fixed take-off angle of 120o.
The high resolution neutron diffractometer HRND is located at the 20 MW China Mianyang Research Reactor (CMRR), which is a neutron powder diffractometer especially dedicated to crystal and magnetic structure studies for polycrystalline powder samples.
0 kommentar(er)
