The neutron powder diffractometer DREAM at the ESS

Measuring Single Crystal Diffuse Neutron Scattering on the Wombat High Intensity Powder Diffractometer

Single crystal diffuse scattering was collected on the Wombat high-intensity powder diffractometer at the OPAL reactor at the Bragg Institute. The difficulty in measuring diffuse scattering comes from its relatively low intensity compared to the Bragg peaks, a factor of 10−10 smaller. Wombat allows collection of diffuse scattering due to its high intensity and large two-dimensional detector. Di...

Neutron guide shielding for the BIFROST spectrometer at ESS

We report on the study of fast-neutron background for the BIFROST spectrometer at ESS. We investigate the effect of background radiation induced by the interaction of fast neutrons from the source with the material of the neutron guide and devise a reasonable fast, thermal/cold neutron shielding solution for the current guide geometry using McStas and MCNPX. We investigate the effectiveness of ...

The Multi-Blade Boron-10-based neutron detector for high intensity neutron reflectometry at ESS

The Multi-Blade is a Boron-10-based gaseous detector introduced to face the challenge arising in neutron reflectometry at pulsed neutron sources. Neutron reflectometers are the most challenging instruments in terms of instantaneous counting rate and spatial resolution. This detector has been designed to cope with the requirements set for the reflectometers at the upcoming European Spallation So...

A two-circle powder diffractometer for synchrotron radiation on Station 2.3 at the SRS

Echidna—the new high-resolution powder diffractometer being built at OPAL

A new powder diffractometer aiming for high angular, and thus high reciprocal space, resolution is being constructed within the Neutron Beam Instrumentation Project at the upcoming Australian Neutron Source OPAL, near Sydney. The neutron flux at the sample can be expected to be up to 10 n/cm/s. With an array of 128 position sensitive detectors, each equipped with a 30 cm high Söller collimator ...