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Journal Articles

Improved performance of wide bandwidth neutron-spin polarizer due to ferromagnetic interlayer exchange coupling

Maruyama, Ryuji; Yamazaki, Dai; Aoki, Hiroyuki; Akutsu, Kazuhiro*; Hanashima, Takayasu*; Miyata, Noboru*; Soyama, Kazuhiko; Bigault, T.*; Saerbeck, T.*; Courtois, P.*

Journal of Applied Physics, 130(8), p.083904_1 - 083904_10, 2021/08

 Times Cited Count:2 Percentile:27.76(Physics, Applied)

Journal Articles

Three-dimensional cellular premixed flames generated by hydrodynamic and diffusive-thermal instabilities (Effects of unburned-gas temperature and heat loss)

Kadowaki, Satoshi; Nogami, Masato*; Thwe, T. A.; Katsumi, Toshiyuki*; Yamazaki, Wataru*; Kobayashi, Hideaki*

Nihon Kikai Gakkai Rombunshu (Internet), 85(879), p.19-00274_1 - 19-00274_13, 2019/11

We dealt with three-dimensional cellular premixed flames generated by hydrodynamic and diffusive-thermal instabilities to elucidate the effects of unburned-gas temperature and heat loss by adopting the three-dimensional compressible Navier-Stokes equation. As the unburned-gas temperature became lower and the heat loss became larger, the growth rate decreased and the unstable range narrowed. With a decrease of unburned-gas temperature, the normalized growth rate increased and the normalized unstable range widened, which was because the temperature ratio of burned and unburned gases became larger. The obtained hexagonal cellular fronts were qualitatively consistent with the experimental results. As the heat loss became larger, the burning velocity of a cellular flame normalized by that of a planar flame increased. This was because diffusive-thermal effects became stronger owing to the increase of apparent Zeldovich number caused by the decrease of flame temperature.

Journal Articles

Accessible length scale of the in-plane structure in polarized neutron off-specular and grazing-incidence small-angle scattering measurements

Maruyama, Ryuji; Bigault, T.*; Wildes, A. R.*; Dewhurst, C. D.*; Saerbeck, T.*; Honecker, D.*; Yamazaki, Dai; Soyama, Kazuhiko; Courtois, P.*

Journal of Physics; Conference Series, 862(1), p.012017_1 - 012017_6, 2017/06

 Times Cited Count:6 Percentile:92.85

The in-plane magnetic structure of Fe/Si multilayers with a polycrystalline grain size less than the ferromagnetic exchange length was investigated using polarized neutron off-specular scattering and grazing-incidence small-angle scattering measurements. These complementary measurements, each of them covering different length scales, together with the data analysis based on the distorted wave Born approximation, revealed lateral correlation in the fluctuating orientation of the magnetization in the layer on a sub-$$mu$$m length scale. The obtained in-plane magnetic structure is consistent with the random anisotropy model, i.e. competition between the exchange interactions between neighboring spins and the local magnetocrystalline anisotropy.

Journal Articles

Quasi-monoenergetic electron beam generation during laser pulse interaction with very low density plasmas

Yamazaki, Atsushi; Kotaki, Hideyuki; Daito, Izuru; Kando, Masaki; Bulanov, S. V.; Esirkepov, T. Z.; Kondo, Shuji; Kanazawa, Shuhei; Homma, Takayuki*; Nakajima, Kazuhisa; et al.

Physics of Plasmas, 12(9), p.093101_1 - 093101_5, 2005/09

 Times Cited Count:70 Percentile:89.78(Physics, Fluids & Plasmas)

no abstracts in English

Journal Articles

Energetic protons from a few-micron metallic foil evaporated by an intense laser pulse

Matsukado, Koji*; Esirkepov, T. Z.; Kinoshita, Kenichi*; Daido, Hiroyuki; Utsumi, Takayuki*; Li, Z.*; Fukumi, Atsushi*; Hayashi, Yukio; Orimo, Satoshi; Nishiuchi, Mamiko; et al.

Physical Review Letters, 91(21), p.215001_1 - 215001_4, 2003/11

 Times Cited Count:134 Percentile:95.39(Physics, Multidisciplinary)

no abstracts in English

Journal Articles

Characterization of disruption phenomenology in ITER

Yoshino, Ryuji; D.J.Campbell*; E.Fredrickson*; Fujisawa, Noboru; N.Granetz*; Gruber, O.*; T.C.Hender*; D.A.Humphreys*; N.Ivanov*; S.Jardin*; et al.

Fusion Energy 2000 (CD-ROM), 4 Pages, 2001/05

no abstracts in English

Journal Articles

Prototype tokamak fusion power reactor based on SiC/SiC composite material, focussing on easy maintenance

Nishio, Satoshi; Ueda, Shuzo; Kurihara, Ryoichi; Kuroda, Toshimasa*; Miura, H.*; Sako, Kiyoshi*; Takase, Kazuyuki; Seki, Yasushi; Adachi, Junichi*; Yamazaki, Seiichiro*; et al.

Fusion Engineering and Design, 48(3-4), p.271 - 279, 2000/09

 Times Cited Count:16 Percentile:71.37(Nuclear Science & Technology)

no abstracts in English

Journal Articles

Advection-dispersion modelling of tritium and chloride migration in the Lake233 drainage basin

Klukas, M. H.*; Moltyaner, G. L.*; Takeda, Seiji; Yamazaki, L. S.*; Kozter, T. G.*

AECL-RC-2132, p.1 - 42, 1998/08

no abstracts in English

Journal Articles

High-Resolution Measurement of Fine Structure in the Photoabsorption Cross Section of $$^{18}$$O

Harada, Hideo; Shigetome, Yoshialki; Ogaki, H.*; Noguchi, T.*; Yamazaki, Tetsuo*

Physical Review Letters, 80(1), p.33 - 36, 1998/01

 Times Cited Count:24 Percentile:74.96(Physics, Multidisciplinary)

None

Journal Articles

On the cluster structure studied by $$^{6}$$Li induced transfer reaction on $$^{9}$$Be nucleus

Hamada, Shingo; Sugiyama, Yasuharu; Ikuta, T.*; Yamazaki, Akiyoshi*

Similarities and differences between atomic nuclei and clusters, p.415 - 422, 1997/00

no abstracts in English

Journal Articles

Study of polyethylene crosslinking by ESR

Yamazaki, T.*; Seguchi, Tadao

DEI-93-157, 0, p.35 - 44, 1993/12

no abstracts in English

Journal Articles

ESR study on crosslinking reaction of PE induced by dicumyl-per-oxide

Yamazaki, T.*; Seguchi, Tadao

DEI-92-118, p.103 - 110, 1992/00

no abstracts in English

Oral presentation

Quasi-monoenergetic electron production by laser acceleration at intensity of a0=0.6

Mori, Michiaki; Kando, Masaki; Daito, Izuru; Kotaki, Hideyuki; Hayashi, Yukio; Esirkepov, T. Z.; Yamazaki, Atsushi; Bulanov, S. V.; Daido, Hiroyuki; Kimura, Toyoaki

no journal, , 

no abstracts in English

Oral presentation

Study of the in-plane magnetic structure of neutron polarizing multilayer mirrors

Maruyama, Ryuji; Bigault, T.*; Wildes, A. R.*; Dewhurst, C. D.*; Saerbeck, T.*; Honecker, D.*; Yamazaki, Dai; Soyama, Kazuhiko; Courtois, P.*

no journal, , 

Neutron polarizing supermirror needs to display high polarization efficiency at low external fields to meet a variety of research demands. The magnetic properties of these multilayers with a polycrystalline grain size less than the ferromagnetic exchange length can be explained by the random anisotropy model, i.e. competition between the exchange interaction between neighboring spins and the local magnetocrystalline anisotropy. Off-specular scattering and grazing-incidence small-angle scattering measurements with polarized neutrons, each of them covering different length scales, together with the data analysis based on the distorted wave Born approximation, revealed lateral correlation in the fluctuating orientation of the magnetization in the layer on a sub-$$mu$$m length scale. The obtained in-plane magnetic structure was consistent with the random anisotropy model.

Oral presentation

Photon energy dependence of photo-neutron production from the $$^{197}$$Au($$gamma$$,xn) reaction

Tran, T. K.*; Sanami, Toshiya*; Yamazaki, Hirohito*; Itoga, Toshiro*; Sakaki, Yasuhito*; Nguyen, L. T. T.*; Kirihara, Yoichi; Nakashima, Hiroshi*; Miyamoto, Shuji*; Asano, Yoshihiro*

no journal, , 

no abstracts in English

Oral presentation

Wide bandwidth neutron polarizing supermirror due to ferromagnetic interlayer exchange coupling

Maruyama, Ryuji; Yamazaki, Dai; Aoki, Hiroyuki; Akutsu, Kazuhiro*; Hanashima, Takayasu*; Miyata, Noboru*; Soyama, Kazuhiko; Bigault, T.*; Saerbeck, T.*; Courtois, P.*

no journal, , 

16 (Records 1-16 displayed on this page)
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