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Enhancing Neutron Scattering Efficiency with Vsans Technique

Explore the Vsans technique utilizing multiple circular converging collimation to improve neutron scattering efficiency. Learn about various Vsans configurations and performance enhancements achieved through converging lenses. Discover how Vsans instrumentation excels in reducing Qmin with optimized flux on sample.

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Enhancing Neutron Scattering Efficiency with Vsans Technique

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  1. Chapter 60 – THE VSANS TECHNIQUE 60:1. MULTIPLE CIRCULAR CONVERGING COLLIMATION 60:3. MULTIPLE SLIT CONVERGING COLLIMATION 60:4. PERFORMANCE OF THE VARIOUS VSANS CONFIGURATIONS 60:4. DISCUSSION

  2. multiple circular source apertures multiple circular sample apertures y z x r1 L1 60:1. MULTIPLE CIRCULAR CONVERGING COLLIMATION

  3. source slits sample slits Dy1 L1 Dx1 60:3. MULTIPLE SLIT CONVERGING COLLIMATION

  4. 60:4. PERFORMANCE OF THE VARIOUS VSANS CONFIGURATIONS

  5. 60:4. DISCUSSION

  6. COMMENTS -- A VSANS instrument is 40 m long. A SANS instrument is 30 m long. -- Qmin for VSANS is one order of magnitude lower than that for SANS. -- Converging collimation lowers the Qmin without large penalty on the flux on sample. Overkill apertures are used to eliminate cross collimation. -- The use of converging lenses increases the flux on sample without penalty on resolution. -- A second high resolution detector is used for the low-Q.

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