Contacts
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Instrument Scientist
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Instrument Scientist
CORELLI is a statistical chopper spectrometer with energy discrimination. It's designed and optimized to probe complex disorder in crystalline materials through diffuse scattering of single-crystal samples. The momentum transfer ranges from 0.5 to 12 Å-1, and the energy of incident neutrons ranges from 10 to 200 meV.
This instrument combines the high efficiency of white-beam Laue diffraction with energy discrimination by modulating the beam with a statistical chopper. A cross-correlation method is used to reconstruct the elastic signal from the modulated data. Accurate modeling of the short-range order associated with the diffuse scattering requires measurements over large volumes of three-dimensional reciprocal space, with sufficient momentum resolution to distinguish the diffuse signal from the strong Bragg peaks.
Moderator | Ambient H2O decoupled poisoned |
Source- to-sample distance | 20 m |
Sample- to-detector distance | 2.5 m |
Anular coverage | -21.9 to +148.2° horizontally ±28.5°vertically |
Energy resolution | ΔE/Einc ~0.9% (FWHM) at Einc=25 meV |
Momentum resolution | ΔQ/Q ≤ 7x10-3at 90oat Q=10 Å-1 |
Incident energy range | 10–200 meV |
Momentum transfer | 0.5 - 16 Å-1 |
Beam size at sample position | ~8 mm/width x 12mm/height |
Minimum solid angle coverage | 2.0 sr |
Instrument Scientist
Instrument Scientist