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Journal Articles

The Characterization of synthetic and natural single crystal diamonds by X-ray diffraction

Maeta, Hiroshi*; Matsumoto, Norimasa*; Haruna, Katsuji*; Saotome, Takao*; Ono, Fumihisa*; Sugai, Hiroyuki; Otsuka, Hideo; Ohashi, Kazutoshi*

Physica B; Condensed Matter, 376-377, p.283 - 287, 2006/04

 Times Cited Count:3 Percentile:18.02(Physics, Condensed Matter)

Natural and synthetic single crystal diamonds (type Ia, Ib, IIa and IIb) have been characterized by measurements of the X-ray integrated scattering intensity, lattice parameter and diffuse scattering. We found that the lattice parameter is smallest for natural diamond and largest for the B-doped diamond. We measured the diffuse scattering for (400) Bragg reflection for the four types of crystals. The scattering intensity of the natural crystals diffuses asymmetrically to form a streak along the [100] direction parallel to the reciprocal lattice vector. These results suggest the existence of the nitrogen atom platelets on (100) plane in the natural diamond. We also found the diffuse streaks along the [$$bar{1}$$00] direction for (400) Bragg reflection for the B-doped crystal, suggesting that boron atoms are likely to form precipitates on the (100) plane.

JAEA Reports

Small specimen test technology of fracture toughness in structural material F82H steel for fusion nuclear reactors

Wakai, Eiichi; Otsuka, Hideo; Matsukawa, Shingo*; Ando, Masami; Jitsukawa, Shiro

JAEA-Technology 2006-019, 58 Pages, 2006/03

JAEA-Technology-2006-019.pdf:7.15MB

Small specimen test technology (SSTT) has been developed to investigate mechanical properties of nuclear materials. SSTT has been driven by limited availability of effective irradiation volumes in test reactors and accelerator-based neutron and charged particle sources, and it is very useful for the reduction of waste materials produced in nuclear engineering. In this study new bend test machines have been developed to obtain fracture behaviors of F82H steel for very small bend specimens of pre-cracked $$frac{t}{2}$$-$$frac{1}{3}$$CVN (Charpy V-notch) with 20 mm-length and DFMB (deformation and fracture mini bend specimen) with 9 mm-length and disk compact tension of 0.18DCT type, and fracture behaviors were examined to evaluate DBTT (ductile-brittle transition temperature) at temperatures from -180 to 250$$^{circ}$$C. The effect of specimen size on DBTT of F82H steel was also examined by using Charpy type specimens such as $$frac{t}{2}$$-CVN, $$frac{1}{3}$$CVN and $$frac{t}{2}$$-$$frac{1}{3}$$CVN. In this paper, it also provides the information of the specimens irradiated at 250$$^{circ}$$C and 350$$^{circ}$$C to about 2 dpa in the capsules of 04M-67A and 04M-68A of JMTR experiments.

Journal Articles

Mechanical properties of small size specimens of F82H steel

Wakai, Eiichi; Otsuka, Hideo*; Matsukawa, Shingo; Furuya, Kazuyuki*; Tanigawa, Hiroyasu; Oka, Keiichiro*; Onuki, Somei*; Yamamoto, Toshio*; Takada, Fumiki; Jitsukawa, Shiro

Fusion Engineering and Design, 81(8-14), p.1077 - 1084, 2006/02

 Times Cited Count:11 Percentile:60.35(Nuclear Science & Technology)

no abstracts in English

Journal Articles

Radiation defects in heavy ion-irradiated nickel at low temperature by X-ray diffuse scattering

Maeta, Hiroshi*; Matsumoto, Norimasa; Kato, Teruo; Sugai, Hiroyuki; Otsuka, Hideo*; Sataka, Masao

Nuclear Instruments and Methods in Physics Research B, 232(1-4), p.312 - 316, 2005/05

 Times Cited Count:1 Percentile:14.46(Instruments & Instrumentation)

no abstracts in English

Journal Articles

Radiation defects in nano-structured materials

Otsuka, Hideo; Hojo, Kiichi; Maeta, Hiroshi*; Otsu, Hitoshi; Sugai, Hiroyuki; Yamamoto, Hiroyuki

European Physical Journal D, 16(1-3), p.309 - 311, 2001/09

no abstracts in English

JAEA Reports

Basic study on vacuum system of an electron synchrotron and mock-up tests

Otsuka, Hideo; *; Shimada, Taihei

JAERI-M 93-051, 37 Pages, 1993/03

JAERI-M-93-051.pdf:1.13MB

no abstracts in English

Journal Articles

Convective loss in tokamaks

Otsuka, Hideo; JFT-2M Group

Nuclear Fusion, 33(4), p.523 - 532, 1993/00

 Times Cited Count:8 Percentile:32.76(Physics, Fluids & Plasmas)

no abstracts in English

JAEA Reports

Study on particle transport to wall in JFT-2M edge plasma by accelerator-based analysis

*; *; *; *; *; Sengoku, Seio; Otsuka, Hideo; Maeda, Hikosuke

JAERI-M 91-048, 57 Pages, 1991/03

JAERI-M-91-048.pdf:1.68MB

no abstracts in English

Journal Articles

SPring-8 complex

Otsuka, Hideo

Hoshasen Kagaku, 34(7), p.201 - 205, 1991/00

no abstracts in English

Journal Articles

Ion Bernstein wave experiment on JFT-2M tokamak

Tamai, Hiroshi; Ogawa, Toshihide; Matsumoto, Hiroshi; Odajima, Kazuo; ; Hoshino, Katsumichi; Kasai, Satoshi; Kawakami, Tomohide; Kawashima, Hisato; Kondoh, Takashi; et al.

Japanese Journal of Applied Physics, 29(10), p.L1911 - L1914, 1990/10

 Times Cited Count:1 Percentile:10.08(Physics, Applied)

no abstracts in English

JAEA Reports

Basic design for the vacuum system of the synchrotron in the large synchrotron radiation facility

*; Otsuka, Hideo; *; Harami, Taikan; Yokomizo, Hideaki; Suzuki, Yasuo

JAERI-M 90-121, 61 Pages, 1990/08

JAERI-M-90-121.pdf:1.05MB

no abstracts in English

Journal Articles

Injector design for the 8 GeV synchrotron radiation facility in Japan

Harami, Taikan; Yokomizo, Hideaki; Otsuka, Hideo; Shimada, Taihei; ; ; Yoshikawa, Hiroshi; Suzuki, Hiromitsu; Kabasawa, M.*; *; et al.

Part. Accel., 33, p.1753 - 1758, 1990/00

no abstracts in English

Journal Articles

Observation of direct electron heating by the fast waves in the low-hybrid range of frequencies in the JFT-2M tokamak

Yamamoto, Takumi; Uesugi, Yoshihiko; Kawashima, Hisato; Hoshino, Katsumichi; ; Kasai, Satoshi; Kawakami, Tomohide; Kondoh, Takashi; Maeda, Hikosuke; Matsuda, Toshiaki; et al.

Physical Review Letters, 63(11), p.1148 - 1151, 1989/09

 Times Cited Count:17 Percentile:75.66(Physics, Multidisciplinary)

no abstracts in English

Journal Articles

H mode observed in the JFT-2M tokamak with edge heating by electron cyclotron waves

Hoshino, Katsumichi; Yamamoto, Takumi; Kawashima, Hisato; Suzuki, Norio; Uesugi, Yoshihiko; Mori, Masahiro; ; Kasai, Satoshi; Kawakami, Tomohide; Matsuda, Toshiaki; et al.

Physical Review Letters, 63(7), p.770 - 773, 1989/08

 Times Cited Count:24 Percentile:80.18(Physics, Multidisciplinary)

no abstracts in English

JAEA Reports

Observation of H-mode by edge heating solely by electron cyclotron heating in a divertor configuration of JFT-2M tokamak

Hoshino, Katsumichi; Yamamoto, Takumi; Kawashima, Hisato; Suzuki, Norio; Uesugi, Yoshihiko; ; Kasai, Satoshi; Kawakami, Tomohide; Matsuda, Toshiaki; Miura, Yukitoshi; et al.

JAERI-M 89-038, 7 Pages, 1989/03

JAERI-M-89-038.pdf:0.29MB

no abstracts in English

Journal Articles

Pump limiter experiment on JFT-2M tokamak

Sengoku, Seio; ; Hoshino, Katsumichi; Kasai, Satoshi; Kawakami, Tomohide; Kawashima, Hisato; Kondo, Takashi*; Maeda, Hikosuke; Matsuda, Toshiaki; Matsumoto, Hiroshi; et al.

Journal of Nuclear Materials, 162-164, p.667 - 673, 1989/00

 Times Cited Count:4 Percentile:49.15(Materials Science, Multidisciplinary)

no abstracts in English

Journal Articles

H-mode by edge ECH in JFT-2M

Hoshino, Katsumichi; Yamamoto, Takumi; Kawashima, Hisato; Tamai, Hiroshi; Ogawa, Toshihide; Odajima, Kazuo; Suzuki, Norio; Uesugi, Yoshihiko; Mori, Masahiro; ; et al.

Radio-Frequency Power in Plasmas, 4 Pages, 1989/00

no abstracts in English

Journal Articles

A New mode of improved confinement in discharges with stationary density in JEF-2M

Mori, Masahiro; Suzuki, Norio; Uesugi, Yoshihiko; Ogawa, Toshihide; Ogawa, Hiroaki; Otsuka, Hideo; Odajima, Kazuo; Kasai, Satoshi; Kawakami, Tomohide; Kawashima, Hisato; et al.

Nuclear Fusion, 28(10), p.1892 - 1897, 1988/10

 Times Cited Count:22 Percentile:72.29(Physics, Fluids & Plasmas)

no abstracts in English

Journal Articles

Particle accumulation at the edge observed in n$$_{e}$$ and T$$_{e}$$ profiles of H-mode JFT-2M plasma

Yamauchi, Toshihiko; Odajima, Kazuo; Uesugi, Yoshihiko; ; D.Dimock*; Kawashima, Hisato; Kasai, Satoshi; Kawakami, Tomohide; Maeda, Hikosuke; Matsuda, Toshiaki; et al.

Physics Letters A, 131(4-5), p.301 - 309, 1988/08

 Times Cited Count:2 Percentile:34.44(Physics, Multidisciplinary)

no abstracts in English

Journal Articles

Steep gradient and pedestal of electron profiles in H-mode JFT-2M plasma

Yamauchi, Toshihiko; Hoshino, Katsumichi; Uesugi, Yoshihiko; ; Kawashima, Hisato; Kasai, Satoshi; Kawakami, Tomohide; Maeda, Hikosuke; Matoba, Toru; Matsuda, Toshiaki; et al.

Japanese Journal of Applied Physics, 27(5), p.L924 - L926, 1988/05

 Times Cited Count:1 Percentile:9.69(Physics, Applied)

no abstracts in English

94 (Records 1-20 displayed on this page)