The PEARL neutron diffractometer is designed to study ‘powder’ samples, in the sense that it the optimisation is done for Debye-Scherrer cones of scattered neutrons, rather than looking at Bragg spots from a single crystal.
This page will describe the full specs of the instrument and standard the sample environment available. For now, the basic specification is:
- one take-off angle: 2Θ = 150°
- 3 wavelengths will be selectable: 1.30, 1.67 and 2.51 Å (Ge)
- atomic d-spacings that are probed: 0.7 < d < 7 Å
- flux estimate on the sample: 10^5 – 10^6 n/s/cm2
- typical sample size: diameter<10mm, height=4cm
- cryostat 10K – room temperature
- cryomagnet <2T, 10K – room temperature (possibly up to 550K)
- custom sample environment should be less than 70cm diameter.