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Approaches for representing hydro-mechanical coupling between sub-surface excavations and argillaceous porous media at the ventilation experiment, Mont Terri

The Second Asian and Oceanic Congress for Radiation Protection

作者： Yukihisa SANADA Hirohide KOBAYASHI Tetsuo HASHIMOTO Radiation Protection Department Nuclear Fuel Cycle Engineering Research Laboratories Japan Atomic Energy Agency （JAEA） Ibaraki Japan Radiation Protection Department Nuclear Fuel Cycle Engineering Research Laboratories Japan Atomic Energy Agency （JAEA） Ibaraki Japan Faculty of Science Niigata University Niigata Japan

The dust monitor for rapid detection of α-emitting artificial radionuclides such as plutonium with Rn-progenies background compensation system was developed by applying a time interval analysis（TIA）.The TIA method,which is one kind of delayed coincidence method,was applied to β-α decay events with microsecond scale（half-life of 214Po:164μs）.Time intervals of neighboring pulses were analyzed by a single time interval analysis（STA）of the TIA *** situ experiments,dust samples on the filter（HE-40T;pore size 8μm）were collected at workplaces in reprocessing plant for measuring the 214Bi-214Po correlated *** that,the measurement of the 214Bi-214Po correlated events was carried out using the developed ***,through an experiment using the filter collected dust placed on a small 241Am source,increment of α-ray counting rate due to the 241Am source was detected clearly by background *** present method will apply for on-line monitoring of α-ray measurement,because the method is able to detect any additional artificial nuclides by compensating any changes of background due to Rn-progeny.

关键词： 214Bi-214Po time interval analysis dust monitor Pu radon progeny

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Journal of Rock Mechanics and Geotechnical Engineering 2013年第2期5卷 85-96页

作者： Alexander Bond Alain Millard Shigeo Nakama Chengyuan Zhang Benoit Garritte Quintessa Ltd. Chadwick House Birchwood Park Warrington Cheshire A3 6AEUK Commissariatà l'Energie Atomique YvetteFrance Japan Atomic Energy Agency (jaea) Tokai Japan Institute of Rock and Soil Mechanics Chinese Academy of Sciences Universidad Politcnica de Catalunya Barcelona Spain

At the Mont Terri Underground Research Laboratory （Switzerland）, a field-scale investigation has been conducted in order to investigate the hydro-mechanical and chemical perturbations induced in the argilla- ceous formation by forced ventilation through a tunnel. This experiment has been selected to be used for processing model development and validation in the international project DECOVALEX-2011. The con- ceptual and mathematical representation of the engineered void, which itself forms a major part of the experiment and is not simply a boundary condition, is the subject of this paper. A variety of approaches have been examined by the contributors to DECOVALEX and a summary of their findings is presented here. Two major aspects are discussed. Firstly, the approaches for the treatment of the surface condition at the porous media/tunnel interface are examined, with two equivalent but differing formulations successfully demonstrated. Secondly, approaches for representing the tunnel with associated air and water vapour movement, when coupled with the hydro-mechanical （HM） representation of the porous medium, are also examined. It is clearly demonstrated that, for the experimental conditions of the ventilation experiment （VE） that abstracted physical and empirical models of the tunnel, can be used successfully to represent the hydraulic behaviour of the tunnel and the hydraulic interaction between the tunnel and the surrounding rock mass.

关键词： Tunnel Water vapour Hydro-mechanical (HM) coupling Numerical modelling Mont Terri Underground Research Laboratory (URL) Ventilation experiment (VE) Argillite

Field-tuned magnetic structure and phase diagram of the honeycomb magnet YbCl_(3)

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Science China(Physics,Mechanics & Astronomy) 2021年第3期64卷 84-89页

作者： YiQing Hao HongLiang Wo YiMeng Gu XiaoWen Zhang YiQing Gu ShiYi Zheng Yang Zhao GuangYong Xu Jeffrey WLynn Kenji Nakajima Naoki Murai WenBin Wang Jun Zhao State Key Laboratory of Surface Physics and Department of Physics Fudan UniversityShanghai 200433China NIST Center for Neutron Research National Institute of Standards and TechnologyGaithersburg 20899USA Department of Materials Science and Engineering University of MarylandCollege Park 20742USA J-PARC Center Japan Atomic Energy Agency(JAEA)Ibaraki 319-1195Japan Institute of Nanoelectronic Devices and Quantum Computing Fudan UniversityShanghai 200433China Collaborative Innovation Center of Advanced Microstructures Nanjing 210093China

We report thermodynamic and neutron diffraction measurements on the magnetic ordering properties of the honeycomb lattice magnet YbCl_(3). We find YbCl_(3) exhibits a Ne′el type long-range magnetic order at the wavevector(0, 0, 0) below TN= 600 *** magnetic order is associated with a small sharp peak in heat capacity and most magnetic entropy release occurs above the magnetic ordering temperature. The magnetic moment lies in-plane, parallel to the monoclinic a-axis, whose magnitude mYb= 0.86(3) μBis considerably smaller than the expected fully ordered moment of 2.24 μBfor the doublet crystal-field ground state. The magnetic ordering moment gradually increases with increasing magnetic field perpendicular to the ab-plane, reaching a maximum value of 1.6(2) μBat 4 T, before it is completely suppressed above ~ 9 T. These results indicate the presence of strong quantum fluctuations in YbCl_(3).

关键词： magnetic order neutron diffraction honeycomb lattice

An Improved System for Shoot Regeneration from Stem Explants of Lombardy Poplar (Populus nigra L. var. italica Koehne)

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American Journal of Plant Sciences 2012年第9期3卷 1181-1186页

作者： Kamal Kanti Biswas Takeshi Mohri Satoshi Kogawara Yoshihiro Hase Yutaka Oono Forestry and Forest Products Research Institute (FFPRI) Tsukuba Japan. Medical and Biotechnological Application Division Japan Atomic Energy Agency (JAEA) Takasaki Japan

We developed a system for the regeneration of Lombardy poplar (Populus nigra L. var. italica) shoots from internodal stem explants. Using this system, shoots regenerated from 87% of the stem explants placed on Murashige and Skoog (MS) medium supplemented with 0.1 mg/L indole-3-acetic acid and 0.5 mg/L benzylaminopurine without undergoing callus formation. About 80% of the in vitro regenerated shoots developed roots on MS medium supplemented with 0.5 mg/L indole-3-butyric acid and 0.02 mg/L 1-naphthylacetic acid. Well-rooted seven-to eight-week-old regenerated plants could be transferred to soil for further growth and the survival rate of such plants after three weeks was 88%. The protocol presented here is simple and economical because it does not rely on pre-incubation in callus induction medium or repeated subculture in shoot induction medium containing trans-zeatin, an expensive substance. The in vitro regeneration system presented here could be used for evaluation of radiation sensitivity for Lombardy poplar tissues.

关键词： Lombardy Poplar Shoot Regeneration Stem Explants Auxin and Benzylaminopurine Radiation Sensitivity

L3-Edge Jump and Shift on White-Line of Pd Interlayer for Trilaminar Neutron Production Target under H2^＋ Irradiation

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Journal of Chemistry and Chemical Engineering 2014年第9期8卷 870-875页

作者： Shintaro Ishiyama Ryo Fujii Masaru Nakamura Yoshio Imahori Quantum Beam Science Center JAEA (Japan Atomic Energy Agency) Ibaraki 319-1195 Japan Cancer Intelligence Care System Incorporated Tokyo 135-0063 Japan

Interlayer Pd for the Li/Pd/Cu neutron target for BNCT （boron neutron capture therapy） was characterized after 0.1-5 keV H2^＋ irradiation by XAFS （X-ray absorption fine structure） technique, and following conclusions were derived：（1） from the XAFS observation of white line of Pd, remarkable Pd L3 edge jump was found in 1.1-3 times higher than before irradiation in low irradiation fluence; （2） this fact indicates increase of hole density in Pd 4d-band, whereas, no change was observed for XASF spectra of Ag sample under the same irradiation conditions; （3） remarkable Pd L3 edge shift of 0.12-0.66 eV was also found with increase of H2＋ irradiation energy in low fluence, and drastically decreased after peak in high irradiation energy and fluence; （4） implanted protons deposited in Pd as negative under the balance of electron population enhanced by proton irradiation and charge transfer.

关键词： Boron neutron capture therapy lithium target palladium X-ray absorption fine structure H2^+.

Large-scale Structures and Electron Transport in Gyrofluid Simulations of ETG Turbulence in Tokamak Plasmas

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Southwestern Institute of Physics Annual Report

Southwestern Institute of Physics Annual Report 2006年第1期 111-112页

作者： LI Jiquan Kishimoto Y. Miyato N. Matsumoto T. DONG Jiaqi 不详 Department of Fundamental Energy Kyoto University 611- 0011 Gokasho Uji Japan Naka Fusion Research Establishment JAEA Naka Ibaraki 311- 0193 Japan

1 Introduction Much attention has been paid to the anomalous electron transport in magnetic confinement fusion plasmas. Recent renewed interest in this subject is the role of large-scale structures, such as zonal flows and streamers, in electron transport. This may partly be stimulated by the exciting achievements on the understanding of ion turbulent transport, which is suppressed to neoclassical transport level by sheared E × B or zonal flows in experiments and theories. Recently, a streamer-like structure is observed in gyrokinetic toroidal ETG turbulence based on a local flux-tube simulation.

关键词：电子传送器湍流等离子体核反应装置

XRD Characterization of AlN Thin Films Prepared by Reactive RF-Sputter Deposition

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Advances in Materials Physics and Chemistry 2013年第1期3卷 101-107页

作者： N. Matsunami H. Kakiuchida M. Sataka S. Okayasu Energy Science Division EcoTopia Science Institute Nagoya University Nagoya Japan Japan Atomic Energy Agency (jaea) Tokai Japan National Institute of Advanced Industrial Science and Technology (AIST) Nagoya Japan

AlN thin films have been grown on R((1-12) surface-cut)-Al2O3, SiO2-glass and C((001) surface-cut)-Al2O3 substrates, by using a reactive-RF-sputter-deposition method. X-ray diffraction (XRD) shows that AlN film has (110) orientation of wurtzite crystal structure for R-Al2O3 and (001) orientation for SiO2-glass and C-Al2O3 substrates. The film thickness was analyzed by Rutherford backscattering spectroscopy (RBS) and it appears that XRD intensity does not show a linear increase with the film thickness but a correlation with the stress, i.e., deviation of the lattice parameter of the film from that of bulk. The film composition and impurities have been analyzed by ion beam techniques. Effects of high-energy ion beams are briefly presented on atomic structure (whether stress relaxation occurs or not), surface morphology and optical properties.

关键词： Aluminum Nitride Film Composition Impurities Atomic Structure Surface Morphology Optical Properties

Simulations on the Nonlinear Mode Coupling in Multiple-scale Drift-type Turbulence with Coherent Flow Structures

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Southwestern Institute of Physics Annual Report

Southwestern Institute of Physics Annual Report 2006年第1期 94-96页

作者： LI Jiquan Uzawa K. Lin Z. Kishimoto Y. Miyato N. Matsumoto T. DONG Jiaqi 不详 Graduate School of Energy Science Kyoto University 611-0011 Gokasho Uji Japan Department of Physics and Astronomy University of California Irvine California 92697 USA Fusion Research and Development Directorate JAEA Naka Ibaraki 311-0193 Japan

1 Introduction Plasma fluctuations in magnetically confined devices, such as the magnetohydrodynamic （MHD） and drift-type turbulence in tokamaks, possess multiple spatio-temporal scales and spectral anisotropy and/or nonlinear instabilities. coexist and interplay each due to the richness of linear Multi-scale fluctuations may other in a highly turbulent environment so that the characteristics of individual turbulence may be affected, even changed. This important issue has attracted intensive attention recently. As an aspect of such problems, coherent zonal flow and low frequency long wavelength generalized Kelvin-Helmholtz （GKH） fluctuations are generated nonlinearly as a secondary component.

关键词：非线性模式耦合漂流湍流流变力学

The current status of versatile neutron diffractometer iMATERIA at J-PARC

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The current status of versatile neutron diffractometer iMATE...