| Co-Investigator(Kenkyū-buntansha) |
KITAJIMA Sadakichi Faculty of Engineering, Kyushu University, 工学部, 教授 (10037690)
WATANABE Denjiro Faculty of Science, Tohoku University, 理学部, 教授 (50004239)
IMURA Toru Faculty of Engineering, Nagoya University, 工学部, 教授 (50022968)
FUJIMOTO Fuminori College of General Education, University of Tokyo, 教養学部, 教授 (70012242)
URA Katsumi Faculty of Engineering, Osaka University, 工学部, 教授 (10028938)
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| Research Abstract |
High voltage electron microscopy (HVEMy) was established in Japan (1963-1965), and many epoch-making results have been obtained in Natural science research. In the present project, new applications of in situ experiments have been carried out extensively by Fujita, Imura, Watanabe and Takeuchi in various research fields, and new type of HVEMs, such as HVEM of STEM type and 5 MV EM, were reported by Ura, and Maruse. Also in the field of HV-HREMy, a number of new observations have been accumulated using 1 MV EMs by Hirabayashi, Shimizu, Mihama, Yagi, Ishida, Shimizu and Uyeda.
At such high accelerating voltages, electron channeling phenomenon (Fujimoto) becomes prominent in crystals and the phenomenon can be effectively used to get high resolution (HR) images full of physical informations. This approach to observe "real" structures by HV-HREMy is in marked contrast with the trend in foreign coutries that HR observations are mainly done with less powerful IVEMs (i. e., 0.3-0.4 MV EM) because of the difficulty in developing HVEMs for HR observation. This shows the high potentiality of our country in HVEMy. A new attempt to produce advanced materials by in-situ electron beam mixing in a U-HVEM (Fujita), as well as systemaic studies of electron irradiation damages (Igata, Takahashi, Kitajima), is a topic in HVEMy. Remarkable progress in analytical EMy is also obtained in this project by the combination of various analytical systems such as EELS, EDX and AES with HVEMs (Ichinokawa, Kamiya, Ura, Fujita). Quantitative, 3-dimensional analysis of thick biological materials by stereomicroscopy in HVEM, carried out by Hama, remains top in this research field. A part of these works was presented at the International Symposium on "Behavior of Lattice Imperfections in Materials In Situ Experiments with HVEM" held in Osaka in Nov., 1985 and at the 8th International Conference on HVEM held in Kyoto in Sep., 1986.
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