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Miyata, Hokata*; Yoshida, Kenta*; Konashi, Kenji*; Du, Y.*; Kitagaki, Toru; Shobu, Takahisa; Shimada, Yusuke*
Microscopy, p.dfaf005_1 - dfaf005_10, 2025/00
Times Cited Count：0 Percentile：0.00(Microscopy)Barucci, M. A.*; Reess, J.-M.*; Bernardi, P.*; Doressoundiram, A.*; Fornasier, S.*; Le Du, M.*; Iwata, Takahiro*; Nakagawa, Hiromu*; Nakamura, Tomoki*; Andr
, Y.*; et al.
Earth, Planets and Space (Internet), 73(1), p.211_1 - 211_28, 2021/12
Times Cited Count：21 Percentile：81.33(Geosciences, Multidisciplinary)The MMX InfraRed Spectrometer (MIRS) is an imaging spectrometer on board of MMX JAXA mission. MIRS is built at LESIA-Paris Observatory in collaboration with four other French laboratories, collaboration and financial support of CNES and close collaboration with JAXA and MELCO. The instrument is designed to fully accomplish MMX's scientific and measurement objectives. MIRS will remotely provide near-infrared spectral maps of Phobos and Deimos containing compositional diagnostic spectral features that will be used to analyze the surface composition and to support the sampling site selection. MIRS will also study Mars atmosphere, in particular to spatial and temporal changes such as clouds, dust and water vapor.
WB-STEM observation of dislocation loop behavior in reactor pressure vessel steel during post-irradiation annealingDu, Y.*; Yoshida, Kenta*; Shimada, Yusuke*; Toyama, Takeshi*; Inoue, Koji*; Arakawa, Kazuto*; Suzudo, Tomoaki; Milan, K. J.*; Gerard, R.*; Onuki, Somei*; et al.
Materialia, 12, p.100778_1 - 100778_10, 2020/08
In order to ensure the integrity of the reactor pressure vessel in the long term, it is necessary to understand the effects of irradiation on the materials. In this study, irradiation-induced dislocation loops were observed in neutron-irradiated reactor pressure vessel specimens during annealing using our newly developed WB-STEM. It was confirmed that the proportion of 
loops increased with increasing annealing temperature. We also succeeded in observing the phenomenon that two 
loops collide into a loop. Moreover, a phenomenon in which dislocation loops decorate dislocations was also observed, and the mechanism was successfully explained by molecular dynamics simulation.
Wang, C.*; Daiwei, Y.*; Liu, X.*; Chen, R.*; Du, X.*; Hu, B.*; Wang, L.*; Iida, Kazuki*; Kamazawa, Kazuya*; Wakimoto, Shuichi; et al.
Physical Review B, 96(8), p.085111_1 - 085111_5, 2017/08
Times Cited Count：9 Percentile：42.67(Materials Science, Multidisciplinary)Waldherr, G.*; Wang, Y.*; Zaiser, S.*; Jamali, M.*; Schulte-Herbr
ggen, T.*; Abe, Hiroshi; Oshima, Takeshi; Isoya, Junichi*; Du, J. F.*; Neumann, P.*; et al.
Nature, 506(7487), p.204 - 207, 2014/02
Times Cited Count：466 Percentile：99.58(Multidisciplinary Sciences)no abstracts in English
Liu, P.*; Du, Y.*; Yoshida, Kenta*; Kitagaki, Toru; Ikeda, Atsushi; Shimada, Yusuke*; Nagai, Yasuyoshi*
no journal, ,
Yoshida, Kenta*; Du, Y.*; Shimada, Yusuke*; Suzudo, Tomoaki; Toyama, Takeshi*; Inoue, Koji*; Arakawa, Kazuto*; Milan, K. J.*; Gerard, R.*; Nagai, Yasuyoshi*
no journal, ,
We developed a weak-beam scanning transmission electron microscopy (WB-STEM) by installing a novel beam selector, annular detector, a high-speed CCD camera and imaging filter in a camera chamber of an aberration corrected electron microscope. In-situ observation confirmed that the newly-developed WB-STEM has improved the ability to observe the dynamic behavior of dislocation loops. In addition, we performed a numerical simulation of dislocation loop behavior using molecular dynamics, and confirmed that the experimental results were well explained by the theoretical analysis. Therefore, this WB-STEM is expected to be useful for understanding the embrittlement mechanism of nuclear materials such as reactor pressure vessel (RPV) steels.
Toyama, Takeshi*; Shibahara, Rie*; Du, Y.*; Inoue, Koji*; Nagai, Yasuyoshi*; Yano, Yasuhide; Otsuka, Satoshi; Mitsuhara, Masatoshi*; Nakashima, Hideharu*; Onuma, Masato*
no journal, ,
no abstracts in English
Du, Y.*; Toyama, Takeshi*; Inoue, Koji*; Otsuka, Satoshi; Yano, Yasuhide; Yoshida, Kenta*; Shimada, Yusuke*; Onuma, Masato*; Mitsuhara, Masatoshi*; Nakashima, Hideharu*; et al.
no journal, ,
Shimodaira, Masaki; Ha, Yoosung; Takamizawa, Hisashi; Toyama, Takeshi*; Du, Y.*; Shimada, Yusuke*; Yoshida, Kenta*; Nagai, Yasuyoshi*; Katsuyama, Jinya
no journal, ,
no abstracts in English
