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The neutron small-angle camera D11 at the high-flux reactor, Grenoble
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1976
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Bent Neutron GuidesEngineeringNuclear PhysicsNuclear DataReactor PhysicsHigh-flux ReactorDetector PhysicsNuclear MaterialsInstrumentationRadiation ImagingHigh-energy Nuclear ReactionRadiation DetectionPhysicsAccelerator Mass SpectrometryNeutron SourceParticle Beam PhysicsNeutron TransportNuclear EngineeringNuclear AstrophysicsExperimental Nuclear PhysicsNatural SciencesParticle PhysicsDetector PhysicCold NeutronsNeutron ScatteringCamera D11
The neutron small‑angle scattering system at Grenoble’s high‑flux reactor comprises cold‑neutron supply via bent guides, the D11 camera, and data‑handling facilities, enabling scattering angles from 5×10⁻⁴ to 0.5 rad and wavelengths of 0.2–2.0 nm. The D11 camera is 80 m long with a variable effective length, featuring adjustable collimators and a 40 m secondary flight path that hosts multiple detector sites, including a 3808‑element, 1 cm² multiwire proportional chamber for simultaneous intensity recording. Thus, a large range of momentum transfers can be used with the same relative resolution.
The neutron small-angle scattering system at the high-flux reactor in Grenoble consists of three major parts: the supply of cold neutrons via bent neutron guides; the small-angle camera D11; and the data handling facilities. The camera D11 has an overall length of 80 m. The effective length of the camera is variable. The full length of the collimator before the fixed sample position can be reduced by movable neutron guides; the secondary flight path of 40 m full length contains detector sites in various positions. Thus, a large range of momentum transfers can be used with the same relative resolution. Scattering angles between 5 × 10−4 and 0.5 rad and neutron wavelengths from 0.2 to 2.0 nm are available. A large-area position-sensitive detector is used which allows simultaneous recording of intensities scattered at different angles; it is a multiwire proportional chamber. 3808 elements of 1 cm2 are arranged in a two-dimensional matrix.