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Yuguchi, Takashi*; Yamazaki, Hayato*; Ishibashi, Kozue*; Sakata, Shuhei*; Yokoyama, Tatsunori; Suzuki, Satoshi*; Ogita, Yasuhiro; Sando, Kazusa*; Imura, Takumi*; Ono, Takeshi*
Journal of Asian Earth Sciences, 226, p.105075_1 - 105075_9, 2022/04
Times Cited Count：4 Percentile：57.69(Geosciences, Multidisciplinary)Simultaneous determination of the U-Pb age of zircon and concentration of titanium in a single analysis spot, using inductively coupled plasma mass spectrometry with laser ablation sample introduction, produces paired age and temperature data of zircon crystallisation, potentially revealing time-temperature (
) histories for evolved magma. The Kurobegawa granite, central Japan, contains abundant mafic magmatic enclaves (MMEs). We applied this method to evaluate MMEs and their host (enclosing) granites. Cooling behaviour common to both MMEs and host rocks was found between 1.5 and 0.5 Ma. Rapid cooling from the zircon crystallisation temperature to the closure temperature of biotite K-Ar system was within 
1 million year. Combining the obtained paths of MMEs and host rocks with petrological information can provide insights into magma chamber processes. This suggests that MME flotation, migration, and spread through the magma chamber ceased at 1.5-0.5 Ma, indicating the emplacement age of the Kurobegawa granitic pluton, as no large-scale reheating episodes have occurred since then.
Hatae, Takaki; Nakatsuka, Masahiro*; Yoshida, Hidetsugu*
Purazuma, Kaku Yugo Gakkai-Shi, 80(10), p.870 - 882, 2004/10
A high performance phase conjugate mirror by stimulated Brillouin scattering (SBS-PCM) is applied to Thomson scattering diagnostics in JT-60U for the first time. To improve the measurement performance, two developments were performed with SBS-PCM. First, we developed a new optical design to provide a double-pass scattering scheme with SBS-PCM. A laser beam passing through the plasma is reflected by the SBS-PCM, and a reflected beam returned back through the same path as coming one by the phase conjugate effect, and passed through the plasma again. The double path Thomson scattering scheme demonstrated in JT-60U plasma that a factor of 1.6 increase of the scattered light in contrast with single-pass scattering. Second, an improvement of the output power of YAG laser system using the SBS-PCM was performed. As a result, average power was increased over 8 times in contrast with conventional system, and was achieved up to 368 W (7.4 J 
50 Hz). A multi-pass Thomson scattering scheme is also proposed based on the results of double-pass scattering.
Hatae, Takaki; Naito, Osamu
Proceedings of 10th International Symposium on Laser-Aided Plasma Diagnostics, p.160 - 166, 2001/00
In recent strong electron heating experiments in JT-60U, it seems that central 
rises above 15 keV which is measured by Ruby laser and YAG laser Thomson scattering systems. However, error bars are relatively large and it is difficult to measure the very high beyond 15 keV with high accuracy because the electron temperature region exceeds that of the original design. To improve the measurement performance in very high , we have tried the combination of existing Ruby laser system and YAG laser system. From simulations, it was found that (1) changing the form of the spectrum with the other laser is an effective way for very high measurement, (2) furthermore the combined system in YAG laser scattering is well optimized at 20keV and relative error is reduced significantly compared with original system.
laser systemKondoh, Takashi; Lee, S.; Miura, Yukitoshi
Purazuma, Kaku Yugo Gakkai-Shi, 76(9), p.883 - 887, 2000/09
no abstracts in English
Kojima, Takuji; Sunaga, Hiromi; Tachibana, Hiroyuki; Takizawa, Haruki; Tanaka, Ryuichi
IAEA-TECDOC-156, p.91 - 98, 2000/06
no abstracts in English
Yoshida, Hidetoshi; Naito, Osamu; Yamashita, Osamu; Kitamura, Shigeru; *; *; *; *; Hatae, Takaki; Nagashima, Akira; et al.
Review of Scientific Instruments, 70(1), p.751 - 754, 1999/01
Times Cited Count：15 Percentile：68.21(Instruments & Instrumentation)no abstracts in English
Yoshida, Hidetoshi; Naito, Osamu; *; Kitamura, Shigeru; Hatae, Takaki; Nagashima, Akira
Review of Scientific Instruments, 70(1), p.747 - 750, 1999/01
Times Cited Count：4 Percentile：38.4(Instruments & Instrumentation)no abstracts in English
Yoshida, Hidetoshi; Naito, Osamu; Yamashita, Osamu; Kitamura, Shigeru; Hatae, Takaki; Nagashima, Akira
JAERI-Research 96-061, 20 Pages, 1996/11
JAERI-Research-96-061.pdf:1.1MB
no abstracts in English
Hoshiya, Taiji; *; *
Shape Memory Materials and Hydrides (Trans. of Materials Research Soc. Jpn., Vol. 18B), 0, p.1013 - 1016, 1994/00
no abstracts in English
*; *; Matoba, Toru; Yamamoto, Shin
Reza Kenkyu, 20(6), p.375 - 391, 1992/06
no abstracts in English
Hoshiya, Taiji; Shimakawa, Satoshi; ; *; Watanabe, Kenji*
Journal of Nuclear Materials, 179-181, p.1119 - 1122, 1991/00
Times Cited Count：17 Percentile：84.03(Materials Science, Multidisciplinary)no abstracts in English
*; Yoshida, Hidetoshi; *; Yamashita, Osamu; Nagashima, Akira; Matoba, Toru
JAERI-M 90-167, 44 Pages, 1990/09
no abstracts in English
; ; ; ; ; ;
Japanese Journal of Applied Physics, 18(3), p.611 - 619, 1979/00
Times Cited Count：3no abstracts in English
Si Jung YEH*; Shibata, Nagao*; Amano, Hiroshi*; Yoshihara, Kenji*; M-Hsing YANG*; Ping Yao CHEN*; Chin Nan KE*; Kudo, Hiroshi*
Journal of Nuclear Science and Technology, 6(2), p.75 - 80, 1969/00
no abstracts in English
Okamoto, Koji
no journal, ,
After Fukushima-Daiichi NPP Accidents, the nuclear power plant should be safety first. No more severe accidents should happen around the world. Nuclear energy is and will be a superior resource for sustainable future. To satisfy these requirements, Safety First Nuclear System with advanced technology are strongly expected. The concept of Safety-First Nuclear Systems would be a promising concept after Fukushima. JAEA will continue to develop the Safety-first Nuclear Systems. Also, for the sustainable future, Safety Decommissioning of Fukushima is JAEA's responsibility too.
Kamide, Hideki
no journal, ,
Current status of advanced reactor developments is reported through the activities of GIF (Generation-IV international Forum) in the Stud Panel 2023 of "Forum for Nuclear Cooperation in Asia".
