[ Identification | Description | Input parameters | Output parameters | Links ]
D1A is a reliable diffractometer for standard crystallographic problems. It gives excellent results with the Rietveld method owing to its near perfect Gaussian peak-shape in the 2θ-range 30° to 150°. Special features include a high fixed take-off angle of 122 deg, giving high resolution at large scattering angles (up to 160 deg); a bank of 25 high efficiency collimators and counters; an anisotropically squashed germanium monochromator focussing a 250 mm high beam onto only 30 mm; a wide choice of wavelengths, from 1.39 Angs to 2.99 Angs, quickly available by simple rotation of the focussing monochromator; The large monochromator take-off angle means that the diffraction pattern is focussed for the parallel geometry shown (2θ = 122°). The counter can be swept through 0 deg to 2θ = 160° deg for the highest angle counter, usually in steps of 0.05 deg. Monochromator Neutron wavelength Ge 117 DM=0.7946 AA 1.390 Ge 335 DM=0.8655 AA 1.514 Ge 115 DM=1.0925 AA 1.911 (optimal) Ge 113 DM=1.712 AA 2.994 The sample is a powder, in a container can, all positioned in an Al environment (e.g. cryostat/furnace shield). This instrument was installed on the H22 guide.
|lambda||Angs||Wavelength at monochromator||1.911|
|DM||Angs||d-spacing of monochromator. Use DM=0 to compute the values from the requested wavelength.||0|
|powder||str||File name for powder sample description||"Na2Ca3Al2F14.laz"|
|container||str||File name for container decription in Al cryostat/furnace||"V.laz"|
[ Identification | Description | Input parameters | Output parameters | Links ]Generated automatically by McDoc, Peter Willendrup <email@example.com> / Wed Sep 5 11:20:18 2018