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A new SANS with high resolution and a wide dynamic range

A Small Angle Neutron Scattering (SANS) instrument with time-of-flight (TOF) and polarized neutron options with enhanced dynamics q-range. It is designed to allow high magnetic fields at the sample position.

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The project

D33 will be a third Small-Angle Neutron Scattering (SANS) instrument at the Institut Laue-Langevin (ILL).

Modern trends in materials science, physics and in particular nano-structured materials require that D33 should provide both high resolution and a wide dynamic range of measured scattering vector, q. In ‘monochromatic’ mode a velocity selector and flexible system of inter-collimation apertures will define the neutron beam. A double chopper system will enable a ‘time-of-flight’ (TOF) mode of operation allowing an enhanced dynamic q-range (qmax / qmin) and flexible wavelength resolution. Two large multitube detectors will extend the dynamic q-range further giving qmax / qmin ~20 in monochromatic mode and massive qmax / qmin > 1000 in TOF mode.

Beam polarization and 3He spin analysis will facilitate and expand studies of magnetism and allow a more quantitative analysis of spin incoherent samples. The position of D33 will be such as to allow high magnetic fields at the sample position.

Instrument team

DEWHURST Charles

Scientific project leader

dewhurst(at)ill.eu

+33 (0)4 76 20 7382


Instrument layout

References

  1. "GRASansP, D33 and parametric and complex data sets", C. D. Dewhurst, CanSAS V Workshop, Gaithersburg, Maryland, USA from October 29th to 31st 2007.
  2. "D33 a third small-angle neutron scattering instrument at the Institut Laue Langevin", Dewhurst C.D., Measurement Science and Technology 19, 034007-1-034007-8 (2008).
    In: "4th European Conference on Neutron Scattering" - Lund, Sweden - 2007-06.

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