| LLB (UMR12 CEA-CNRS) | Mail to webmaster |
24 world-class instruments, installed on the neutron beams of reactor Orphee, are available to users.
A detailed description of these instruments is given in the blue book "Equipements Experimentaux" available on request at the Scientific Secretary of the LLB.
Powder diffractometers
| 3T2 | "Thermal neutrons" 2-axis (20 detectors) high resolution, mainly for nuclear structure determination. | G4.1 | "Cold neutrons" 2-axis (multidetector 800 cells) high flux, mainly for magnetic structure determination | G4-2 | "Cold neutrons" 2-axis (7x10 detectors) high resolution, for structure determination on polycrystalline samples with large unit cell. | G6.1 | "Cold neutrons" 2-axis (multidetector 400 cells) with long wavelength (~5Å) and high flux, for the study of very small powder samples (<1mm3). Very high pressure cell available (40 GPa). |
Single crystal diffractometers
| 5C1 | "Hot neutrons" 2-axis with lifting arm, polarized neutrons, magnetic field (8 Tesla) for spin-density maps determination | 5C2 | "Hot neutrons" 4-circle for nuclear structure determination. | 6T2 | "Thermal neutrons" 2-axis, lifting arm and 4-circle, mainly for magnetic structure determination. 12 Tesla magnetic field available. |
Diffuse scattering instruments
| 7C2 | "Hot neutrons" 2-axis (multidetector 640 cells) for local order studies in liquid or amorphous systems. Cryostat and furnace available (1.2K to 1300°C). |
Small-angle scattering instruments
| G1.2 | "Cold neutrons" (annular detector, 30 rings) for study of large scale structures in isotropic systems (mainly polymers and colloids). | G2.3 | "Cold neutrons" (X-Y detector, 128x128 cells) for study of large scale structures (10 to 500 Å) in anisotropic systems (polymers under stress, metallurgical samples, vortex in superconductors). | G5.4 | "Cold neutrons" (X-Y detector, 64x64 cells) for multipurpose studies of large scale structures. | G5.5 | "Cold neutrons" (X-Y detector, 64x64 cells) ; polarized beam ; large scale magnetic structures ; contrast variation by nuclear polarization of protons. |
Diffractometers for material science studies
| 6T1 | "Thermal neutrons" 4-circle for texture determination. | G5.2 | "Cold neutrons" 2-axis for internal strain determination in bulk samples with spatial resolution ~ 1mm3. |
Reflectometers
| G3bis | "Cold neutrons" reflectometer operating in time-of-flight mode for multipurpose surface studies. | G 2.4 | "Cold neutrons" reflectometer with polarized neutrons and polarization analysis for the study of magnetic layers. |
Triple-axis instruments
| 1T | "Thermal neutrons" high-flux 3-axis instrument with focussing monochromator and analyser, mainly devoted to phonon dispersion curves measurements. Very high pressure cell (100 Kbar) available. | 2T | "Thermal neutrons" high-flux spectrometer with focussing monochromator and analyser, mainly devoted to spin-waves and magnetic excitations studies (1.5 to 80 meV). | 4F1 4F2 | "Cold neutrons" high flux 3-axis instruments with double monochromator and analyzer, mainly devoted to the study of low-energy (15µeV to 4meV) magnetic excitations. Polarized neutrons and polarization analysis option available. | G4.3 | "Cold neutrons" high resolution and low background 3-axis instrument, mainly devoted to elastic diffuse scattering studies. |
Quasi-elastic instruments
| G6.2 | "Cold neutrons" high resolution (~15µeV at 10Å) time-of-flight instrument for the study of low energy excitations, mainly in disordered systems. | G1bis | "Cold neutrons", high resolution and high flux spin-echo instrument. It can study, in a large Q range, slow dynamics of large molecules in biology or long relaxation times like in glassy transition (Fourier times ~ 20ns) |
Neutron Radiography
| G4.5 | Imaging technique : white beam facility for non-destructive control or dynamics imaging. |
| LABORATOIRE LEON BRILLOUIN | Mise ŕ jour : |
| © CEA-CNRS |