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Neutron Powder Diffractometers in J-PARC and Its Impact for Materials Science or Materials Developing
Here we describe two neutron powder diffractometers, iMATERIA and SHRPD, at the Materials and Life Science Experimental Facility in J-PARC. iMATERIA (IBARAKI Materials Design Diffractometer) has been constructed to be a high throughput versatile diffractometer enabling materials scientists to use it like a chemical analytical instrument in their material development processes. Typical measuring time to obtain 'Rietveld-quality' data is several minutes for the sample size of laboratory X-ray diffractometer. On the other hand, SHRPD (Super High Resolution Powder Diffractometer) has been constructed by J-PARC to promote the best science using the best resolution in the world (Δ<I>d</I>/<I>d</I>=0.03%) . Two instruments will be ready by the Day-One.. |
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Neutron Powder Diffractometers in J-PARC and Its Impact for Materials Science or Materials Developing. |
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R. Oishi, M. Yonemura, Y. Nishimaki, S. Torii, A. Hoshikawa, T. Ishigaki, T. Morishima, K. Mori, T. Kamiyama, Rietveld analysis software for J-PARC, Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 10.1016/j.nima.2008.11.056, Vol.600, No.1, pp.94-96, 2009.02, A new analysis software suite, Z-Code, is under development for powder diffraction data analyses in the Materials and Life Science Facility (MLF) of the Japan Proton Accelerator Research Complex (J-PARC). This software suite comprises data processing, data analyses, graphical user interface and visualization software. As a part of Z-Code, a Rietveld analysis program for neutron (TOF and angle dispersive) and X-ray data, Z-Rietveld, has been developed. Here we report the basic traits and some significant features of Z-Rietveld. © 2008.. |
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T. Ishigaki, A. Hoshikawa, M. Yonemura, T. Morishima, T. Kamiyama, R. Oishi, K. Aizawa, T. Sakuma, Y. Tomota, M. Arai, M. Hayashi, K. Ebata, Y. Takano, K. Komatsuzaki, H. Asano, Y. Takano, T. Kasao, IBARAKI materials design diffractometer (iMATERIA)-Versatile neutron diffractometer at J-PARC, Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 10.1016/j.nima.2008.11.137, Vol.600, No.1, pp.189-191, 2009.02, Ibaraki prefecture, the local government of the area for J-PARC site, was decided to build a versatile neutron diffractometer (IBARAKI Materials Design Diffractometer, iMATERIA) to promote an industrial application for neutron beam in J-PARC. iMATERIA is planned to be a high throughput diffractometer so that materials engineers and scientists can use it like the chemical analytical instruments in their materials development process. It covers in d range 0.18 |
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Shuki Torii, Masao Yonemura, Teguh Yulius Surya Panca Putra, Junrong Zhang, Ping Miao, Takashi Muroya, Ryoko Tomiyasu, Takahiro Morishima, Setsuo Sato, Hidenori Sagehashi, Yukio Noda, Takashi Kamiyama, Super high resolution powder diffractometer at J-PARC, Journal of the Physical Society of Japan, 10.1143/JPSJS.80SB.SB020, Vol.80, No.SUPPL. B, pp.1-20, 2011.12, Super High Resolution Powder Diffractometer, SuperHRPD, is located at about 100 m from a thin side of a decoupled poisoned moderator at the Materials and Life Science Experimental Facility in the Japan Proton Accelerator Research Complex. The first neutron was produced successfully from a spallation neutron source in J-PARC in the end of May of 2008, and SuperHRPD has achieved the world best resolution Δd/d = 0.035% in June using the existing Sirius 1) chamber. In the summer of 2009, a new SuperHRPD chamber was installed aiming at increasing the detector solid angle and expanding d-range / Q-range, with at most 1500 one-dimensional 3He position-sensitive detectors of 1/2 inch in diameter. The on-beam commissioning of the new SuperHRPD was started in the autumn of 2009. © 2011 The Physical Society of Japan.. |
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汎用中性子回折装置,茨城県材料構造解析装置(iMATERIA)の現状について(III). |
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27pXZB-1 Structure Analysis and Direction of Polarization of STO18 using SHRPD at J-PARC. |
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Development of an Advanced Special Neutron Powder Diffractometer under Extreme Environment for Materials. |
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粉末指数付けソフトウェアCONOGRAPH. |
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Development of an Advanced Special Neutron Powder Diffractometer under Extreme Environment for Materials. |
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Development of an Advanced Special Neutron Powder Diffractometer under Extreme Environment for Materials. |
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Ryoko Oishi-Tomiyasu, Application of convex optimization to identification of atomic species from diffraction patterns, Powder Diffraction, 10.1017/S0885715616000804, Vol.32, No.S1, pp.S179-S185, 2017.09, Copyright © International Centre for Diffraction Data 2017. Computational methods and a program to obtain crystal structures that have the perfectly identical diffraction patterns, i.e. structure factors with the same absolute values and the same lattice symmetry are discussed. This is directly related to the uniqueness of solutions in crystal structure determination of single-crystal/powder-crystal samples from diffraction data. In order to solve the problem, it is necessary to solve a system of quadratic equations. The framework of positive-semidefinite programming is used herein to solve the system efficiently.. |
