Abstract
A cold neutron triple-axis spectrometer (Cold TAS) has been installed in HANARO at the Korea Atomic Energy Research Institute, South Korea. It has been designed for high-resolution inelastic-neutron-scattering (INS) measurements of spin and lattice dynamics using a neutron velocity selector (NVS) for incident cold neutrons. We evaluated the wavelength resolution and harmonics filtration of the NVS and verified the vertical focusing effects of the pyrolytic-graphite crystal monochromator. The beam flux at the sample position and the spectrometer resolution, which are key factors in INS experiments, attained the typical TAS specification. Finally, we exemplified INS spectra to show the current performance of the high-resolution mode and magnetic-excitation measurements.
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