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Quasi-elastic and inelastic neutron scattering spectrometer DNA in MLF, J-PARC and its application to materials science

Kawakita, Yukinobu  ; Matsuura, Masato*; Tominaga, Taiki*; Yamada, Takeshi*; Kobayashi, Makoto*; Nakagawa, Hiroshi   

The ToF back scattering spectrometer, DNA at BL02, MLF, J-PARC, is a tool for quasi-elastic and inelastic neutron scattering studies aiming at atomic and spin dynamics ranged from pico to nano sec in bio-molecules, softmatters and solid state materials such as ionic conductors including batteries and strongly-correlated electron system. High signal-to-noise ratio are achieved by Si analyzer mirrors back-coated with a Gd neutron absorber. DNA equips a pulse shaping chopper of max 300 Hz and Si111 analyzer mirrors which select the scattered neutrons only with 2.08 meV with the Bragg angle of 87.5 degree and cover a momentum transfer from 0.08 to 1.9 (1/A). Recently we start installation of Si311 analyzer mirrors too which select a scattered neutron with 7.64 meV and widen a momentum transfer range up to 3.79 (1/A). In this presentation, we introduce the spec of DNA including recent commissioning for Si311 analyzer mirrors and several applications to materials science.

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