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Harjo, S.; Moriai, Atsushi; Shirakihara, Kaori; Suzuki, Hiroshi; Suzuya, Kentaro; Arai, Masatoshi
no journal, ,
An engineering diffractometer 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 project. This instrument views a decoupled-poisoned liquid H
moderator providing neutrons with good symmetrical diffraction profiles in the acceptable wavelength range. The primary and secondary flight paths are 40 m and 2.0 m, respectively, with a curved supermirror neutron guide. The optimization of this instrument has been performed with a Monte Carlo simulation, and an appropriate resolution of less than 0.2 % in 
/ has been confirmed for samples with gauge widths less than 5.0mm.
Harjo, S.; Moriai, Atsushi; Suzuya, Kentaro; Takata, Shinichi; Shirakihara, Kaori*; Morii, Yukio; Arai, Masatoshi; Tomota, Yo*; Akita, Koichi
no journal, ,
The Engineering Materials Diffractometer TAKUMI is now being developed at J-PARC project. TAKUMI is one of the prospective instruments to promote industrial users programs, and has main specifications as follows. A high intensity to realize short measuring times, a high resolution to assure high accuracies on stresses and microscopic strains measurements, and an enough wavelength bandwidth for analyzes of anisotropic deformation behaviors and textures in bulk engineering materials. TAKUMI views a decoupled-poisoned H moderator, has 40m L1 and 2.0m L2. Main detector banks are located at 90 deg scattering angle. A curved neutron guide with focusing-vertically tapered at the tail part is used to transport neutrons. From a Monte Carlo simulation, a resolution of about 0.15% has been confirmed for high resolution mode. TAKUMI has an effective wavelength bandwidth of about 3.51
at a 25Hz disk chopper operation, that gives more than 15 reflections for steel samples.
Harjo, S.; Moriai, Atsushi; Shirakihara, Kaori; Suzuya, Kentaro; Suzuki, Hiroshi; Takata, Shinichi; Morii, Yukio; Arai, Masatoshi; Tomota, Yo*; Akita, Koichi*; et al.
no journal, ,
no abstracts in English
Harjo, S.; Moriai, Atsushi; Suzuya, Kentaro; Aizawa, Kazuya; Nakai, Tetsushi*; Shirakihara, Kaori*; Takata, Shinichi; Morii, Yukio; Arai, Masatoshi; Tomota, Yo*; et al.
no journal, ,
no abstracts in English