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Journal Articles

Phase-field model for crystallization in alkali disilicate glasses; Li$$_2$$O-2SiO$$_2$$, Na$$_2$$O-2SiO$$_2$$ and K$$_2$$O-2SiO$$_2$$

Kawaguchi, Munemichi; Uno, Masayoshi*

Journal of the Ceramic Society of Japan, 128(10), p.832 - 838, 2020/10

 Times Cited Count:0 Percentile:0.01(Materials Science, Ceramics)

This study developed phase-field method (PFM) technique in oxide melt system by using a new mobility coefficient ($$L$$). The crystal growth rates ($$v_0$$) obtained by the PFM calculation with the constant $$L$$ were comparable to the thermodynamic driving force in normal growth model. The temperature dependence of the $$L$$ was determined from the experimental crystal growth rates and the $$v_0$$. Using the determined $$L$$, the crystal growth rates ($$v$$) in alkali disilicate glasses, Li$$_2$$O-2SiO$$_2$$, Na$$_2$$O-2SiO$$_2$$ and K$$_2$$O-2SiO$$_2$$ were simulated. The temperature dependence of the $$v$$ was qualitatively and quantitatively so similar that the PFM calculation results demonstrated the validity of the $$L$$. Especially, the $$v$$ obtained by the PFM calculation appeared the rapid increase just below the thermodynamic melting point ($$T_{rm m}$$) and the steep peak at around $$T_{rm m}$$-100 K. Additionally, as the temperature decreased, the $$v$$ apparently approached zero ms$$^-1$$, which is limited by the $$L$$ representing the interface jump process. Furthermore, we implemented the PFM calculation for the variation of the parameter $$B$$ in the $$L$$. As the $$B$$ increased from zero to two, the peak of the $$v$$ became steeper and the peak temperature of the $$v$$ shifted to the high temperature side. The parameters $$A$$ and $$B$$ in the $$L$$ increased exponentially and decreased linearly as the atomic number of the alkali metal increased due to the ionic potential, respectively. This calculation revealed that the $$A$$ and $$B$$ in the $$L$$ were close and reasonable for each other.

Journal Articles

A Noniterative mean-field QM/MM-type approach with a linear response approximation toward an efficient free-energy evaluation

Kido, Kentaro

Journal of Computational Chemistry, 40(24), p.2072 - 2085, 2019/09

 Times Cited Count:1 Percentile:6.74(Chemistry, Multidisciplinary)

Journal Articles

Preliminary measurements on single and multi-crystal diamond electron cathodes

Minehara, Eisuke

Proceedings of 2nd Annual Meeting of Particle Accelerator Society of Japan and 30th Linear Accelerator Meeting in Japan, p.55 - 56, 2005/07

The next generation high brightness and high current electron source like a photo cathode, a thermionic cathode, a crystal Diamond electron cathode and others would be expected to realize the next generation ERL (energy recovery linac) based light source and SASE X-ray free-electron laser. The JAERI FEL group has recently started to develop a new crystal Diamond electron cathode technology for high current, high brightness, and long life electron source. In the presentation, we plan to explain and to discuss our strategy and a preliminary experimental measurements of the crystal Diamond cathode, and related Diamond cathode evaluation system.

Journal Articles

Large-scaled non-thermal laser peeling, cutting and drilling in nuclear decommissioning industry

Minehara, Eisuke; Hajima, Ryoichi; Sawamura, Masaru; Nagai, Ryoji; Kikuzawa, Nobuhiro; Nishimori, Nobuyuki; Iijima, Hokuto; Nishitani, Tomohiro; Kimura, Hideaki*; Oguri, Daiichiro*; et al.

Proceedings of 13th International Conference on Nuclear Engineering (ICONE-13) (CD-ROM), 10 Pages, 2005/05

The JAERI FEL has recently discovered the new FEL lasing of 255fs ultra fast pulse, 6-9% high-efficiency, one gigawatt high peak power, a few kilowatts average power, and wide tunability of medium and far infrared wavelength regions at the same time. Using the new lasing and energy-recovery linac technology, we could extend a more powerful and more efficient free-electron laser (FEL) than 10kW and 25%, respectively, for nuclear industry, pharmacy, medical, defense, shipbuilding, semiconductor industry, chemical industries, environmental sciences, space-debris, power beaming and so on. In order to realize such a tunable, highly-efficient, high average power, high peak power and ultra-short pulse FEL, we need the efficient and powerful FEL driven by the JAERI compact, stand-alone and zero boil-off super-conducting RF linac with an energy-recovery geometry. Our discussions on the FEL will cover the application of non-thermal peeling, cutting, and drilling to decommission the nuclear power plants, and to prevent stress-corrosion cracking in nuclear industry and roadmap for the industrial FELs, the JAERI compact, stand-alone and zero-boil-off cryostat concept and operational experience, the new, highly-efficient, high-power, and ultra fast pulse lasing mode, and the energy-recovery geometry.

JAEA Reports

Journal Articles

On the free energy structure of antiferromagnetic Potts model

Yokota, Terufumi

International Journal of Modern Physics B, 15(26), p.3409 - 3417, 2001/10

 Times Cited Count:0 Percentile:0.01(Physics, Applied)

no abstracts in English

Journal Articles

The JAERI free-electron laser driven by a superconducting rf Linac towards ultra-short pulse, highly-efficient, high power, and tunable coherent light sources

Minehara, Eisuke

Hoshako, 14(3), p.182 - 189, 2001/06

We would like to explain reccent developments and future plans of the JAERI(Japan Atomic Energy Research Institute) free-electron lasers driven by a superconducting rf linac with an energy recovery loop. In the beginning of February 2000, we could exceed our 1-kW design goal and finally reach 2.34kW in quasi-continuous wave(CW) operation with a very high extraction efficiency of 5 percent or more. The high power and highly-efficient lasing has recently been found to be a novel one, a few cycle lasing of 250fs, and about 1 GW peak at the perfect synchronism without lethargy.

Journal Articles

Oxygen potential and defect structure of the solid solution, Mg-Gd-UO$$_{2}$$

Fujino, Takeo*; Sato, Nobuaki*; Yamada, Kota*; Okazaki, Manabu*; Fukuda, Kosaku; Serizawa, Hiroyuki; Shiratori, Tetsuo*

Journal of Nuclear Materials, 289(3), p.270 - 280, 2001/03

 Times Cited Count:2 Percentile:20.15(Materials Science, Multidisciplinary)

no abstracts in English

JAEA Reports

Thermodynamic calculations for chemical vapor deposition of silicon carbide using ehyltrichlorosilane

Nakano, Junichi; Yamada, Reiji

JAERI-Research 95-045, 26 Pages, 1995/06

JAERI-Research-95-045.pdf:1.08MB

no abstracts in English

Journal Articles

Vaporization behaviour of (Pu,Am)N

Ogawa, Toru; Omichi, Toshihiko; Maeda, Atsushi; Arai, Yasuo;

Journal of Alloys and Compounds, 224, p.55 - 59, 1995/00

 Times Cited Count:23 Percentile:78.93(Chemistry, Physical)

no abstracts in English

Journal Articles

Thermodynamic analysis of Zr-U and Zr-Np alloys in view of f-d interaction

Ogawa, Toru; J.K.Gibson*; R.G.Haire*; M.M.Gensini*; Akabori, Mitsuo

Journal of Nuclear Materials, 223, p.67 - 71, 1995/00

 Times Cited Count:15 Percentile:80.05(Materials Science, Multidisciplinary)

no abstracts in English

Journal Articles

Recent development of the JAERI FEL driven by a superconducting RF linac accelerator

Minehara, Eisuke; Sugimoto, Masayoshi; Sawamura, Masaru; Nagai, Ryoji; Kikuzawa, Nobuhiro

Proc. of the 20th Linear Accelerator Meeting in Japan, 0, p.66 - 68, 1995/00

no abstracts in English

Journal Articles

Free energy of formation of $$delta$$-UZr$$_{2}$$; Comment on the paper: K.Nagarajan,R.Babu and C.K.Mathews,enthalpy of formation of UZr$$_{2}$$ by calorimetry

Ogawa, Toru

Journal of Nuclear Materials, 209, p.107 - 108, 1994/00

 Times Cited Count:5 Percentile:66.44(Materials Science, Multidisciplinary)

no abstracts in English

Journal Articles

Effect of electrostatic field on energy conversion efficiency in high current Raman ragime free electron laser

Kishimoto, Yasuaki; *; ; Odajima, Kazuo; Maeda, Hikosuke

Journal of the Physical Society of Japan, 59(1), p.118 - 129, 1990/01

 Times Cited Count:6 Percentile:54.65(Physics, Multidisciplinary)

no abstracts in English

JAEA Reports

Themodynamic Calculations for Chamical Vapor Deposition of Silicon Cable

Minato, Kazuo; ; Ikawa, Katsuichi

JAERI-M 85-043, 27 Pages, 1985/03

JAERI-M-85-043.pdf:0.9MB

no abstracts in English

Journal Articles

Evaluation of the neutron mean free path and related optical potential in the medium energy region

*; ; *

Atomkernenergie, 45(3), p.176 - 178, 1984/00

no abstracts in English

Journal Articles

Thermodynamic properties of Th$$_{0}$$$$_{.}$$$$_{8}$$$$_{0}$$U$$_{0}$$$$_{.}$$$$_{2}$$$$_{0}$$O$$_{2}$$$$_{+}$$$$_{x}$$ solid solution

Ugajin, Mitsuhiro; ; Shiba, Koreyuki

Journal of Nuclear Materials, 116(2-3), p.172 - 177, 1983/00

 Times Cited Count:15 Percentile:82.07(Materials Science, Multidisciplinary)

no abstracts in English

Journal Articles

Application of an extended reguler solution model to carbides of group IVb,Vb and actinide metals

Scr.Metall., 16, p.781 - 785, 1982/00

no abstracts in English

Journal Articles

Energy loss of 1000keV electrons in thin silicon crystals as measured by high voltage electron microscopy

; Izui, Kazuhiko; ;

Radiat.Eff., 26(1-2), p.129 - 133, 1975/02

no abstracts in English

19 (Records 1-19 displayed on this page)
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