工学材料回折装置の概要と可能性 [in Japanese] Introduction of The Engineering Materials Diffractometer and Application Possibilities [in Japanese]
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The Engineering Materials Diffractometer TAKUMI designed to solve many problems in materials science and engineering including investigations of stresses and crystallographic structures within engineering components is now being developed at J-PARC. TAKUMI views a decoupled-poisoned liquid H<SUB>2</SUB> moderator with the primary and secondary flight paths of 40 m and 2.0 m, respectively. A curved supermirror neutron guide with the total length of 30 m is installed in between the primary flight path. TAKUMI has a pair main detector with the scattering angle of 90°. The best resolution of this instrument is 0.15%, which corresponds to the strain value of about 75×10<SUP>-6</SUP>. The incident fluxes simulated using a Monte Carlo simulation for a wavelength bandwidth of 0.8-4.31 Å are 4.8×10<SUP>7</SUP>n/cm<SUP>2</SUP>/s at high intensity mode, and 2.2×10<SUP>7</SUP>n/cm<SUP>2</SUP>/s at high resolution mode. The construction is now in a middle stage where some parts are in installation. The construction is planned to be completed as the first phase on April 2008, and the commissioning program will be started during 2008.
X-RAYS 50(1), 40-45, 2008-02-29
The Crystallographic Society of Japan