Application of composite Germanium neutron monochromators at SINQ: neutronpowder diffraction (HRPT) and single crystal diffraction (TriCS)

Two vertically focusing composite germanium monochromators have been built by PSI and are now in use at the two thermal diffraction instruments at SIN Q. A 28 cm high unit is used by the HRPT and a smaller, 13 cm high unit, at the single-crystal diffractometer TriCS. Both instruments are presently in their test phase with first 'real' experiments. We present the performance of the monochromators as well as resolutions achieved in the experiments. (C) 2000 Elsevier Science B.V. All rights reserved.