What science can Zoom do?
ZOOM is a flexible, high count rate polarised SANS instrument which will use novel focussing devices and detectors to reach smaller Q, to complement SANS2d instrument, without building an impracticably long beam line. The polarisation will allow the separation of magnetic and structural components, enabling the study of magnetic systems and to separate the incoherent background component, useful for samples with a high H content. With simple focussing at the detector ZOOM will match the previously proposed SANS2d at Qmin of 0.001 Å-1 and with more advanced devices should reach 0.0003 Å-1 ( ~ 2 μm). ZOOM will record two dimensional scattering patterns from anisotropic systems, and have a wide simultaneous Q range out to at least ~ 0.15 Å-1, which is well suited for kinetic and dynamic experiments. ZOOM will considerably enhance “conventional SANS” rather than open up new science areas for “5 - 100 micron sized particles” as on LARMOR.
If magnetic lenses are used, then polarised incident beam SANS experiments on magnetic systems will become possible, again complementing SANS2d. The use of contrast variation and its large simultaneous Q range will make ZOOM very powerful. The option to focus the beam to ~ 1 or 2mm at the sample could enhance long wavelength flux and hence small Q count rates by ~ 5 for conventional SANS at L2 ~ 4 – 5 m with small samples.
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