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Shiwaku, Hideaki; Marushita, Motoharu*
JAEA-Research 2022-015, 39 Pages, 2023/05
JAEA-Research-2022-015.pdf:2.74MB
We designed the hard X-ray undulator beamline BL22XU, which is dedicated to Japan Atomic Energy Research Institute (JAERI) at SPring-8 (now Japan Atomic Energy Agency (JAEA)). BL22XU is used for XAFS (X-ray Absorption Fine Structure) analysis experiments to develop separation and extraction materials for radioactive waste treatment and to elucidate their chemical behavior, magnetic research experiments using a diffractometer, and experiments under extreme conditions using a high-pressure press and a diamond anvil cell. The available X-ray energy range was set from 3 to 70 keV. To design the optics of the beamline, the reflectivity of the mirrors, the diffraction width of the monochromatic crystal, and the absorptance of the Be window were calculated. In addition, ray tracing was performed to optimize the materials for optics, dimensions, and location. The delay time of the ADL (Acoustic Delay Line) was also examined to ensure the safety in the use of radioactive materials. The operation of BL22XU "JAEA Actinide Science I" has already started. By collaborating BL22XU and BL23SU "JAEA Actinide Science II," which uses a soft X-ray undulator as a light source, we solve the problems to promote nuclear sciences. Since the monochromator was upgraded in 2018-2019, initial planning and measured data are documented here again.
Miyagawa, Reina*; Kamibayashi, Daisuke*; Nakamura, Hirotaka*; Hashida, Masaki*; Zen, H.*; Somekawa, Toshihiro*; Matsuoka, Takeshi*; Ogura, Hiroyuki*; Sagae, Daisuke*; Seto, Yusuke*; et al.
Scientific Reports (Internet), 12, p.20955_1 - 20955_8, 2022/12
Times Cited Count：3 Percentile：27.65(Multidisciplinary Sciences)We evaluated Laser-Induced Periodic Surface Structure (LIPSS) crystal structures using the stress imaging station at BL22XU of JAEA-BL on SPring-8. Crystallization of LIPPS was used different two types laser these are Ti:Sapphire laser (wavelength: 800 nm) and MIR-FEL (mid-infrared free electron laser, wavelength 11.4 
m). These lasers are different in the laser pulse structure and the wavelength. We investigated on the effects of formed LIPSS crystallization using different kind of laser. Measured synchrotron X-ray energy is 30 keV and beam size is 20 m. Detector of diffracted X-ray is two-dimensional detector (PILATUS300K, DECTRIS). LIPSS formed using Ti:Sapphire laser has deformed structure with good crystallinity. LIPSS formed using MIR-FEL has dislocation or fault without structural stress. These results show depending on select of laser forming LIPPS structure. These information becomes important a point of the functional application of LIPSS.
Suzuki, Tomoya*; Ogata, Takeshi*; Tanaka, Mikiya*; Kobayashi, Toru; Shiwaku, Hideaki; Yaita, Tsuyoshi; Narita, Hirokazu*
Analytical Sciences, 35(12), p.1353 - 1360, 2019/12
Times Cited Count：5 Percentile：18.38(Chemistry, Analytical)no abstracts in English
Shiwaku, Hideaki; Tanida, Hajime; Tominaga, Aki; Okamoto, Yoshihiro; Yaita, Tsuyoshi
no journal, ,
no abstracts in English
Tominaga, Aki; Oba, Yojiro; Shobu, Takahisa; Tanida, Hajime; Owada, Kenji*; Konno, Azusa; Morooka, Satoshi; Motokawa, Ryuhei; Kumada, Takayuki
no journal, ,
In development of oxide-dispersed ferritic steels, it is known that precipitation of Cr rich phase hardens ferrite phase and decreases toughness in base material. Small angle X-ray scattering is a promising method for analysis of this precipitation process because the precipitate is nanometer size. However, it is usually difficult to separate the scattering between the Fe phase and Cr phase since Fe and Cr are close in atomic number. Therefore, in order to observe the state of phase separation of Cr, we developed an anomalous X-ray small angle scattering (A-SAXS) method using synchrotron radiation.
Suzuki, Tomoya*; Ogata, Takeshi*; Narita, Hirokazu*; Shiwaku, Hideaki; Tanida, Hajime; Kobayashi, Toru; Yaita, Tsuyoshi
no journal, ,
no abstracts in English
Tominaga, Aki; Shobu, Takahisa; Sato, Seiichi*; Hatakeyama, Kiyoshi*; Nagai, Takayuki
no journal, ,
Glassy radioactive waste is a promising method for treating radioactive waste. Many kinds of elements are confined in the glass raw material. To stablish technology of confirm the stability for vitrified substances is required. We developed an analytical method for residual stress in vitrified radioactive waste samples using the analyzing from synchrotron-ray diffraction and scattering profile. We are studying application to various vitrified radioactive waste samples. We hope that this measurement method will be one of the methods for contributing to the solvation of vitrification technology.
Tominaga, Aki; Shobu, Takahisa; Sato, Seiichi*; Hatakeyama, Kiyoshi*; Nagai, Takayuki
no journal, ,
High level radioactive vitrified materials are subject to monitoring during decades at storage facilities and over tens of thousands of years at final disposal sites. Although sufficient structural stability for long-term storage is necessary, high effluent filling which is often incompatible with mechanical and chemical integrity are required. The inhomogeneity of the glass yielded in preparation will cause the instability of the glass. Residual stress is one of the important parameters for evaluating the stability of the vitrified materials. Conventional stress measurement using a strain gauge reveal the averaged stress of whole specimen, however, local stress is also important because it can be an origin of the deformation or crack. Therefore, we developed a method using high-energy synchrotron X-ray stress measurements to clarify the local strain of the vitrified materials. Moreover, stress of each structural component such as crystalline and glass matrix can be separated by the method.
Tominaga, Aki; Oba, Yojiro; Shobu, Takahisa; Owada, Kenji*; Tanida, Hajime; Konno, Azusa; Morooka, Satoshi; Motokawa, Ryuhei; Kumada, Takayuki
no journal, ,
In steel materials, it is known that precipitation of Cr rich phase hardens ferrite phase and decreases toughness in base material. Small angle X-ray scattering is a promising method for analysis of this precipitation process because the precipitate is nanometer size. However, it is usually difficult to separate the scattering between the Fe phase and Cr phase since Fe and Cr are close in atomic number. Therefore, in order to observe the state of phase separation of Cr, we developed an anomalous X-ray small angle scattering (A-SAXS) method at BL22XU.
Tominaga, Aki; Shobu, Takahisa; Kamei, Naomitsu; Muramatsu, Toshiharu
no journal, ,
A joint exists in mechanical structure. The material used according to the use environment is also various for mechanical structure. The reliability is requested of the technology to which those are joined. Laser machining doesn't choose the material. It's expected that this is used as variety material junction technique and necessary welding technique. It's necessary to consider influence of a stress by the variety organization of the joint neighborhood, the mechanical property and the difference in the heat expansion coefficient between the variety metal together. To aim at generalization by this TAKUMI's technological calculation scientific simulation, permanent deformation spacial distribution inside the same kind material weld material between the carbon steel, the carbon steel and the variety material weld material of oxygen-free copper by a high powered fiber laser was measured and the special quality about the processing influence was estimated.
