集光型偏極中性子小角散乱装置(SANS-J-2)へのシナリオ

概要

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Soft matters, which are comprised of various systems such as polymers, membranes, micelles, liquid crystals, gels, colloids, supercooled liquids, multi-component liquids, etc, commonly form hierarchical self-assembled structures with a special scale ranging between nm to μm, and time scale ranging between pico second to hours. A task of small-angle scattering for the next generation is to realize in-situ or real-time observations on the self-assembled structures covering ultrasmall angle region of q<10-3Å-1. For this purpose, our research groups at Tokai develop two spectrometers of small-angle neutron scattering (SANS-J and PNO). The focusing devices of sextupole permanent magnet and MgF2 biconcave lenses are installed on a pin-hole small-angle scattering spectrometer SANS-J. With these focusing devices, we aim to achieve the q-resolution qmin=10-4Å-1 and/or the intensity gain (×10, possibly). The q-resolution qmin=10-4Å-1 is complementary with that of a double crystal ultrasmall-angle scattering spectrometer PNO, which can cover a q-range down to q≅10-5Å-1. In this paper, we shortly describe our upgrade plan to achieve the focusing polarized neutron small-angle scattering spectrometer SANS-J-II.