D33 is a Small-Angle Neutron Scattering instrument for the characterization of samples with typical sizes varying from the nanometer scale to few tenth of micrometer. In addition to a standard monochromatic mode of operation, D33 offers a time of flight mode (TOF) to cover an enhanced dynamic q-range q_max/q_min in one instrument setting. High magnetic fields, up to 17 T at the sample position, beam polarization and ³He spin analysis, facilitate and expand studies of magnetism and allow a more quantitative analysis of spin incoherent samples. The high flux allows for kinetic experiments with time resolution of the order of few milliseconds.

• Soft condensed Matter: organic and inorganic colloidal particles; polymers blends or polymer in solution, gels, liquid crystals; self assembly of surfactant molecules.
• Biology: proteins, nucleic acids, biomembranes, vectors for drug delivery.
• Material Science: phase separation in alloys and glasses, morphologies of superalloys, microporosity in ceramics, interfaces and surfaces of catalysts.
• Magnetism:  Flux line lattices in superconductors; magnetic correlations.

• Top: neutron selection either with a neutron velocity selector (monochromatic mode) or with choppers (time of flight mode)
• Middle: collimation part
• Bottom: front and rear detector moving in the vacuum tube from 1.2 m to 12.8 m after the sample position.