The Kiel/Berlin pressure cells for neutron powder diffraction

Two piston/cylinder type pressure cells for neutron powder diffraction are presented. They provide a large sample volume and hence allow rapid data co llection at moderate flux neutron sources. Structure refinements from the d iffraction data are possible. The maximum attainable pressure is above 2 GP a for Ti/Zr zero-scattering pressure cylinders. Both cells may be equipped with a micro-furnace. This allows measurement up to 700 K, simultaneously t o the application of pressure. The low temperature setup for the cell-I is presented which will allow experiments down to 1.5 K.