Laboratoire Léon Brillouin

UMR12 CEA-CNRS, Bât. 563 CEA Saclay

91191 Gif sur Yvette Cedex, France

+33-169085241 llb-sec@cea.fr

BD diffusons les neutrons

Neutrons
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Neutrons

Le réacteur Orphée.

Les neutrons permettent de sonder la matière et leur sensibilité aux éléments légers et au magnétisme en font une sonde unique et originale. A l'IRAMIS , l’utilisation de la spectrométrie neutronique dans divers domaines de la recherche fondamentale et appliquée est développée autour du Laboratoire mixte CEA-CNRS Léon Brillouin autour du réacteur Orphée à Saclay. Ils sont principalement destinés à l'étude de la matière condensée. L'activité scientifique propre du laboratoire peut se regrouper en trois secteurs sensiblement d'égale importance: la physico-chimie, les études structurales et de transition de phases, le magnétisme et la supraconductivité.


 

 

Neutron diffusion make possible to probe the matter and its sensitivity to the light elements and to magnetism make it a single and original probe. Within IRAMIS, neutron spectrometry is used in various fields in fundamental and applied research and is developed around the CEA-CNRS Laboratory Leon Brillouin (LLB) around the Orphée reactor in Saclay. Neutrons are mainly intended for the study of condensed matter. The scientific activity of the laboratory belongs to three sectors of equal importance: physicochemistry, structural studies and phase transitions, magnetism and supraconductivity.

 

 
Neutrons

The Orphée reactor.

#110 - Màj : 28/08/2019
Voir aussi
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Eros a versatile reflectometer
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LLB is engaged in the upgrade of IN6 through a CRG contract of type A.
MAGiC: a polarised single crystal diffractometer   Brief description MAGiC is a polarized time-of-flight single-crystal diffractometer dedicated to the study of magnetic properties in both applied and purely fundamental systems.
LLB is engaged at various levels in the construction of five spectrometers around ESS (European Spallation Source in Sweden) This is the Skadi web page.
Project roadmap Within the CMR50 project (Cible-Modérateur-Réflecteur 50kW), the DIS (Department d’Ingéniérie des Systèmes), the DACM (Le Département des Accélérateurs, de Cryogénie et de Magnétisme), the DPhN (Département de Physique Nucléaire), the SPR (Service de Protection contre le Rayonnement)  and the Laboratoire Léon Brillouin are making joined efforts to build a Target Moderator Reflector assembly (and its shielding) which can handle a proton beam of 50 kW.
What is a Compact Accelerator-based Neutron Source (CANS) ?   A CANS is composed of the following elements: A proton or deuton source producing a particle beam at energies on the order of 100 keV with a peak intensity up to 100mA A RFQ stage (Radio-Frequency Quadrupole) whose role is to shape the continuous ion beam and ensure a first acceleration up to an energy of a few MeV Extra accelerating stages to push the ion energies to the requested energy (several 10 MeV) Transport lines to the target.
Various news in connection with CANS (Compact Accelerator neutron Source)
September 2019 The HBS High Brillance Source workshop will take place in Unkel on October 26-27th July 2019 The UCANS-8 took place in Paris.
General documents and overviews about CANS
  Documents with a French perspective Compact Neutron Sources for Neutron Scattering (HAL-CEA) Une source de diffusion neutronique alternative en France pour la prochaine décennie ? (HAL-CEA) General documents on CANS EPJ Plus Focus Point on Compact accelerator-driven neutron sources The Jülich high-brilliance neutron source project U.
Presentations at workshops or conferences 2018 Presentation on "Neutron Scattering on Compact Neutron Sources", TU Delft, February 2018.
Operating, under commissionning or in project CANS sources across the world
The improvement of the mechanical properties of polymer films by inclusion of mineral particles is a well known industrial practice used since the end of the XIX century.
Using conjugated polymers as the active materials in electronic and optoelectronic devices opens up the possibility of fabricating all-polymer devices using solution processing technologies.
Light-harvesting antennae are pigment-protein complexes involved in light-absorption and excitation energy transfer (EET) to the so-called "reaction center" complexes, where the photochemical processes of photosynthesis take place.
I.V. Golosovsky1, I. Mirebeau2, G. André2, D. A. Kurdyukov3, Yu. A. Kumzerov3,
1: St. Petersburg Nuclear Physics Institute, 188350, Gatchina, St.
Les nanoaimants moléculaires forment des systèmes magnétiques discrets isolés, composés d’un nombre fini d’atomes magnétiques, qui présentent donc des effets quantiques par rapport aux systèmes classiques de dimension infinie.
The strongly interacting conduction electrons can be accurately represented as a gas of weakly interacting electron-like excitations.
Hidden degrees of freedom in aperiodic crystals.
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This study investigates the long term behavior of glasses used for confinement of nuclear wastes.
BiFeO3 is a multiferroic materials in which ferroelectric and anti-ferromagnetic orders coexist well above room temperature (TN=643 K, TC=1093 K), with a high polarization (over 100 μC/cm2 [1]).
In 1893 Sir William Armstrong reported a remarkable experiment: if a high voltage is established between two wine-glasses filled to the brim with pure water and connected by a cotton  thread, a rope of water is formed and remains suspended between the lips of the two glasses.
  In the pyrochlore compounds R2Mo2O7, both rare earth R3+ and M4+ transition metal ions form a threedimensional network of corner sharing tetrahedra.
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The concept of "spin ladder" originally appeared to study the theoretically still controversial antiferromagnet (AF) 2D square lattice in high temperature superconducting cuprates starting from a well understood 1D AF chain [1-2].
This work is part of a theoretical project which aims to unravel the mechanism at work in the high temperature cuprate superconductors.
Le magnétisme est un domaine d’intérêt majeur, car combiné à l’électronique, il a modifié en profondeur notre vie quotidienne : sous forme de capteurs, d’actionneurs, de dispositifs nomades (téléphones, tablettes, ordinateurs portables), de matériaux aux capacités de stockage accrues pour l'enregistrement magnétique de toutes nos données informatiques.
The pseudogap region of the phase diagram is an important unsolved puzzle in the field of hightransition-temperature (Tc) superconductivity, characterized by anomalous physical properties below a certain temperature, T*[1].

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