QENS study for functional materials and reduction of time-space correlation function

Kawakita, Yukinobu  

At J-PARC, AMATERAS and DNA are frequently used for QENS measurements. The former is the direct geometry inelastic neutron spectrometer with pulse-shaping and monochromating disk choppers which enable us to access a wide range of incident neutron energy from 1 to 80 meV. The multi Ei method is very useful for catching overall features from slow and large-scale dynamics to fast and atomic-scale dynamics simultaneously. The latter is the near back-scattering inelastic neutron spectrometer with a pulse-shaping chopper and Si111 analyzer mirrors which enable us to access energy transfer range of -500 to 1500 micro eV with high resolution of 2.4 micro eV. The extremely high signal-to-noise ratio extends QENS and INS applications widely. My talk consists of three parts. (1) Current status of MLF, J-PARC, (2) QENS study of functional materials, and (3) reduction of time-space correlation function of liquid metal.