Abstract
Two Triple Axis spectrometers are commissioned now at the Budapest Neutron Center. The Thermal Triple Axis Spectrometer (TAST) is installed on the 8-th beam (60 mm diameter) and supplied with a 120 mm-long sapphire crystal placed inside the channel (2 m far from monochromator) to filter fast neutrons. The Eulerian cradle can be placed at the sample position to carry out holographic measurements. Otherwise a normal goniometer (carrying up to 100 kg weight for orientation, e.g. Cryostat/magnet/heavy sample) is used. This spectrometer's resolution was modeled by VITESS program package. The second (cold) neutron spectrometer (ATHOS) on a curved (4200m) neutron guide is mounted at the 19m-position from the cold source. The neutron guide 1.5Θc, made of boron glass, is coated with NiTi multilayer. This instrument, developed into the RITA-type spectrometer, is supplied with a 190 × 190 mm2 position sensitive detector and a polarization option (stacked polarizer). In addition it has the optional COMPACT Neutron Spin Echo setup, based on Larmor precession, for energy analysis with the resolution of 10 µeV. The test measurements are presented. (© 2004 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)
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