Institution
Japan Atomic Energy Research Institute
Government•
About: Japan Atomic Energy Research Institute is a based out in . It is known for research contribution in the topics: Neutron & Irradiation. The organization has 7707 authors who have published 14471 publications receiving 207688 citations.
Topics: Neutron, Irradiation, Ion, Tokamak, Polymerization
Papers published on a yearly basis
Papers
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TL;DR: In this article, the authors show that the performance of tungsten surfaces under intense transient thermal loads is another critical issue, since the formation of a melt layer may favor the generation of highly activated dust particles.
523 citations
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TL;DR: In this paper, two new scaling expressions for tokamak L-mode energy confinement are proposed, namely a power law scaling and an offset-linear scaling, based on an analysis of the ITER Lmode ECC database.
Abstract: On the basis of an analysis of the ITER L-mode energy confinement database, two new scaling expressions for tokamak L-mode energy confinement are proposed, namely a power law scaling and an offset-linear scaling. The analysis indicates that the present multiplicity of scaling expressions for the energy confinement time τE in tokamaks (Goldston, Kaye, Odajima-Shimomura, Rebut-Lallia, etc.) is due both to the lack of variation of a key parameter combination in the database, fs = 0.32 R a−0.75 k0.5 ~ A a0.25k0.5, and to variations in the dependence of τE on the physical parameters among the different tokamaks in the database. By combining multiples of fs and another factor, fq = 1.56 a2 kB/RIp = qeng/3.2, which partially reflects the tokamak to tokamak variation of the dependence of τE on q and therefore implicitly the dependence of τE on Ip and ne, the two proposed confinement scaling expressions can be transformed to forms very close to most of the common scaling expressions. To reduce the multiplicity of the scalings for energy confinement, the database must be improved by adding new data with significant variations in fs, and the physical reasons for the tokamak to tokamak variation of some of the dependences of the energy confinement time on tokamak parameters must be clarified.
504 citations
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TL;DR: In this paper, the authors show that ELM energy losses are correlated with the density and temperature of the pedestal plasma before the ELM crash and the timescale of ELM particle fluxes.
Abstract: Analysis of Type I ELMs from ongoing experiments shows that ELM energy losses are correlated with the density and temperature of the pedestal plasma before the ELM crash. The Type I ELM plasma energy loss normalized to the pedestal energy is found to correlate across experiments with the collisionality of the pedestal plasma (ν*ped), decreasing with increasing ν*ped. Other parameters affect the ELM size, such as the edge magnetic shear, etc, which influence the plasma volume affected by the ELMs. ELM particle losses are influenced by this ELM affected volume and are weakly dependent on other pedestal plasma parameters. In JET and DIII-D, under some conditions, ELMs can be observed (`minimum' Type I ELMs with energy losses acceptable for ITER), that do not affect the plasma temperature. The duration of the divertor ELM power pulse is correlated with the typical ion transport time from the pedestal to the divertor target (τ||Front = 2πRq95/cs,ped) and not with the duration of the ELM-associated MHD activity. Similarly, the timescale of ELM particle fluxes is also determined by τ||Front. The extrapolation of the present experimental results to ITER is summarized.
492 citations
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TL;DR: The magic numbers in exotic nuclei are discussed, and their novel origin is shown to be the spin-isospin dependent part of the nucleon-nucleon interaction in nuclei.
Abstract: I talk about appearance of new magic numbers and disappearance of some existing usual magic numbers in exotic nuclei far from the s-stability line. This is a very intriguing problem, and its mechanism is related to basic properties of nucleon-nucleon interaction in a very robust way. Several exotic features of nuclei far from stability will be mentioned in a unified way in relation to this interaction.
472 citations
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TL;DR: Results indicate that TT19 participates in the PA pathway as well as the anthocyanin pathway of Arabidopsis, and the function of TT19 in thePA pathway is also discussed in the context of the putative transporter for PA precursors.
Abstract: Flavonoid compounds such as anthocyanins and proanthocyanidins (PAs; so-called condensed tannins) have a multitude of functions in plants. They must be transported from the site of synthesis in the cytosol to their final destination, the vacuoles. Three models have been proposed for sequestering anthocyanins in vacuoles, but the transport machinery for PAs is poorly understood. Novel Arabidopsis mutants, transparent testa 19 (tt19), which were induced by ion beam irradiation, showed a great reduction of anthocyanin pigments in the vegetative parts as well as brown pigments in the seed coat. The TT19 gene was isolated by chromosome walking and a candidate gene approach, and was shown to be a member of the Arabidopsis glutathione S-transferase (GST) gene family. Heterologous expression of a putative ortholog, petunia anthocyanin 9 (AN9), in tt19 complemented the anthocyanin accumulation but not the brown pigmentation in the seed coat. This suggests that the TT19 gene is required for vacuolar uptake of anthocyanins into vacuoles, but that it has also a function different from that of AN9. The depositional pattern of PA precursors in the mutant was different from that in the wild type. These results indicate that TT19 participates in the PA pathway as well as the anthocyanin pathway of Arabidopsis. As involvement of GST in the PA pathway was previously considered unlikely, the function of TT19 in the PA pathway is also discussed in the context of the putative transporter for PA precursors.
444 citations
Authors
Showing all 7708 results
Name | H-index | Papers | Citations |
---|---|---|---|
William F. DeGrado | 110 | 599 | 43508 |
David J. Hill | 107 | 1364 | 57746 |
Makoto Fujita | 98 | 451 | 36732 |
Yuliang Zhao | 93 | 538 | 30249 |
Yi Luo | 81 | 668 | 30958 |
Timothy J. White | 72 | 466 | 20574 |
Takeji Hashimoto | 71 | 431 | 17381 |
Toshiki Tajima | 68 | 627 | 22528 |
Hajime Akimoto | 67 | 385 | 16568 |
Andreas Schadschneider | 66 | 358 | 20856 |
Tomoyuki Takahashi | 64 | 187 | 17199 |
Hiroshi Nishihara | 62 | 616 | 14683 |
Hirofumi Uchimiya | 62 | 233 | 11496 |
A. Loarte | 61 | 395 | 14856 |
Masahide Asano | 60 | 159 | 12332 |