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ISIS SANS Training Course

1–10 Feb 2022
Europe/London timezone

ISIS SANS Group

Session

Webinars

1 Feb 2022, 13:30

Presentation materials

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  1. 1. Introduction to neutron scattering
    Dr Sarah Rogers (ISIS Neutron and Muon Source)
    01/02/2022, 13:30

    • Introduction to the course

    • Introduction to ISIS SANS Group current staff

    • Introduction to Neutron Scattering
      ~ Basics of neutron interactions
      ~ Types of experiments carried out
      ~ Why do we do neutron scattering
      ~ How neutrons are made: spallation and reactor
      ~ Time-of-flight and wavelength distribution

    • Introduction to experimental hall and the SANS beamlines

    -...

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  2. 2. Small-angle neutron scattering (SANS) part 1
    Gregory Smith (ISIS Neutron and Muon Source)
    02/02/2022, 13:30
    • SAS from different kinds of radiation (light, electrons, X-rays, neutrons)
    • Momentum transfer vector, Q. How to vary Q. Relationship between Q, scattering angle, and real-space distance
    • Monochromatic vs time-of-flight SANS.
    • Scattering length density (SLD).
    • SANS instruments.
    • Instrument resolution.
    • SANS variants
      ~ Total scattering
      ~ VSANS. USANS.
      ~ SESANS.
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  3. 3. Small-angle neutron scattering (SANS) part 2
    Gregory Smith (ISIS Neutron and Muon Source)
    02/02/2022, 14:00

    • Reducing data
      ~ Going from 2D detector image to normalised 1D data.
      ~ Absolute cross section per unit volume.
      ~ General data correction sequence.
      ~ ISIS data reduction sequence in Mantid.
      ~ Measurements at ISIS to achieve normalised data.

    • Understanding data
      ~ Calculating absolute cross section per unit volume.
      ~ Form factors and structure factors.
      ~ Scattering invariant.

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  4. 4. Small-angle neutron scattering (SANS) part 3
    Gregory Smith (ISIS Neutron and Muon Source)
    02/02/2022, 14:30
    • Advantages of using neutrons to study materials.
    • Science that can be done with SANS.
    • Materials that can be studied with SANS.
    • Case studies from ISIS SANS Group.
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  5. 6. SANS/SAXS Data analysis
    Dr Stephen King (ISIS Neutron and Muon Source)
    03/02/2022, 13:30
    • Purpose of data analysis
    • Data formats (including content, types, why they matter)
    • Options for data analysis
    • Model-fitting 101 (incl objectives, priors, optimisers, measures of fit quality)
    • SasView collaboration
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  6. 25. Q&A
    Dr Stephen King (ISIS Neutron and Muon Source)
    03/02/2022, 14:15
  7. 9. SANS of biological systems
    Dr James Doutch (ISIS Neutron and Muon Source), Dr Najet Mahmoudi (ISIS Neutron and Muon Source)
    07/02/2022, 13:30
    • Contrast variation: isotopic and perdeuteration
    • Sample preparation
    • Examples of biological complexes
      ~ Dilute protein solutions; globular and IDP in lipid mimics
      ~ Protein complexes
      ~ Protein/nucleotides complexes
      ~ Lipid nanoparticles
    • Analysis of biological SANS
      ~ Theory of real-space analysis
      ~ Shape reconstruction
      ~ Atomistic and coarse-grained modelling
      ~...
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  8. 11. Scattering from ordered and magnetic systems part 1
    Dr Dirk Honecker (ISIS Neutron and Muon Source)
    08/02/2022, 13:30
    • Orientational distributions of particles
      ~ Measure the degree of orientational order
      ~ 2D inversion method to analyse anisotropic small-angle scattering
      ~ Revisit structure factor of particle assemblies (Self-assembly, partially ordered arrays of particles, mesocrystals)
    • Small-angle diffraction (skyrmions, flux-line lattices)
      ~ Ewald sphere and area detector
      ~ Rocking Scans
      ~...
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  9. 12. Scattering from ordered and magnetic systems part 2
    Dr Diego Alba Venero (ISIS Neutron and Muon Source)
    08/02/2022, 14:15
    • The different kinds of scattering (coherent, incoherent, elastic, inelastic, nuclear spin incoherent)
    • Introduction to Neutron Spin, Polarisation and Magnetic Scattering
    • Halpern Johnson vector
    • Examples
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  10. 15. Experimental practicalities part 1
    Gregory Smith (ISIS Neutron and Muon Source)
    09/02/2022, 13:30

    • Preparing for measurements
      ~ Importance of preliminary information and being prepared.
      ~ Complementary techniques. Simultaneous SAXS and SANS.
      ~ Time scales. Kinetic SANS, histogram and event modes.

    • Contrast variation
      ~ Neutron SLDs. Isotopic variation. Isotope effects.
      ~ Deuteration chemistry. Other isotopic labeling.
      ~ Simultaneous data fitting.

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  11. 16. Experimental practicalities part 2
    Gregory Smith (ISIS Neutron and Muon Source)
    09/02/2022, 14:15

    • Things to check during measurements
      ~ Wavelength slicing in ToF SANS.
      ~ Incoherent and inelastic scattering.
      ~ Balancing scattering and attenuation.

    • Sample environments
      ~ What kind of samples can be studied.
      ~ Simple sample holders for SANS (cuvettes or no cuvettes, cans). Compare to SAXS (capillaries).
      ~ Simple perturbations.
      ~ Advanced sample environments.

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  12. 27. How to get beamtime!
    Dr Robert Dalgliesh (ISIS Neutron and Muon Source)
    09/02/2022, 15:30
    • How ISIS FAPs work and how to target a proposal for them as an audience.
    • Modes of access.
    • Discussing experiments with local contacts.
    • What to include in a proposal. What makes a good proposal.
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