title: Development and applications of a new neutron single-crystal diffractometer based on a two-dimensional large-area curved position-sensitive detector.
abstract: A new single-crystal neutron diffractometer based on a large-area curved two-dimensional position-sensitive detector (C-2DPSD) has been developed. The diffractometer commissioning is almost complete, together with development of the measurement methodology and the raw data processing software package, theReciprocal Analyzer, and the instrument is now ready to be launched for users. Position decoding of the C-2DPSD isviaa delay-line readout method with an effective angular range of 110 × 54° in the horizontal and vertical directions, respectively, with a nominal radius of curvature of 530 mm. The diffractometer is equipped with a Ge(311) mosaic monochromator and two supermirror vacuum guide paths, one before and one after the monochromator position. The commissioning incorporates corrections and calibration of the instrument using an NaCl crystal, various applications such as crystallographic and magnetic structure measurements, a crystallinity check on large crystals, and a study on the composition or dopant content of a mixed crystal of (TmxYb1-x)Mn2O5. The installation of the diffractometer and the measurement method, the calibration procedure and results, the raw data treatment and visualization, and several applications using the large C-2DPSD-based diffractometer are reported.
authors.affiliation: Neutron Science Division, Korea Atomic Energy Research Institute, Daejeon, Republic of Korea ; Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai, Japan.
authors.forename: Chang-Hee
authors.initials: CH
authors.lastname: Lee
authors.forename: Yukio
authors.initials: Y
authors.lastname: Noda
authors.forename: Yoshihisa
authors.initials: Y
authors.lastname: Ishikawa
authors.forename: Shin Ae
authors.initials: SA
authors.lastname: Kim
authors.forename: Myungkook
authors.initials: M
authors.lastname: Moon
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Kimura
authors.forename: Masashi
authors.initials: M
authors.lastname: Watanabe
authors.forename: Yuki
authors.initials: Y
authors.lastname: Dohi
keywords: curved two-dimensional position-sensitive detectors; neutron diffractometers; single-crystal neutron diffraction