检索结果-南通市图书馆

deuterium Retention in the Co-Deposition Carbon Layers Deposited by Radio-Frequency Magnetron Sputtering in D2 Atmosphere

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics Letters 2014年第5期31卷 42-46页

作者：张卫媛施立群张斌胡建生 Applied Ion Beam Physics Laboratory Institute of Modern Physics Fudan University Shanghai 200433 Department of Nuclear Science and Technology Fudan University Shanghai 200433 Institute of Plasma Physics Chinese Academic of Sciences Hefei 230031

Carbon is deposited on C and Si substrates by rf magnetron plasma sputtering in a D2 atmosphere. The deposited layers are examined with ion beam analysis and thermal desorption spectroscopy （TDS）. The growth rates of the layers deposited on Si decrease with increasing substrate temperature, while increase significantly with the increase of D2 pressure. Meanwhile, the deuterium concentrations in the layers deposited on the Si substrates decrease front 30% to 2% and front 31% to 1% on the C substrates, respectively, when the substratc temperature varies from 350K to 90OK. Similarly, the D concentration in the layer on the Si substrates increases from 3.4% to 47%, and from 8% to 35% on the C substrates when the D2 pressure increases from 0.3Pa to ***. D desorption characterized by TDS is mainly in the forms of D2, HD, HDO, CD4, and C2D4, and a similar release peak occm% at 645K. The release peak olD2 molecules at 960K can be attributed to the escaped gas from the thin co-deposited deuterium-rich carbon layer in the form of C D bonding.

关键词： Ion beams deuterium Spectroscopy

deuterium cluster jet produced at moderate backing pressures

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Optics Letters 2006年第5期4卷 249-251页

作者：王红斌葛芳芳刘红杰倪国权杨向东谷渝秋温贤伦周维民王光昶温天舒何颖玲焦春晔张双根王向贤 Institute of Atomic and Molecular Physics Sichuan UniversityChengdu 610064 Research Center of Laser FusionChina Academy of Engineering PhysicsMianyang 621900 Department of Science Chongqing UniversityChongqing 400044 Research Center of Laser FusionChina Academy of Engineering PhysicsMianyang 621900 Research Center of Laser Fusion China Academy of Engineering PhysicsMianyang 621900 State Key Laboratory of High Field Laser Physics Shanghai Institute of Optics and Fine MechanicsChinese Academy of SciencesShanghai 201800 Institute of Atomic and Molecular Physics Sichuan UniversityChengdu 610064

A deuterium cluster jet produced in the supersonic expansion into vacuum of deuterium gas at liquid nitrogen temperature and moderate backing pressures are studied by Rayleigh scattering techniques. The experimental results show that deuterium clusters can be created at moderate gas backing pressures ranging from 8 to 23 bar, and a maximum average cluster size of 350 atoms per cluster is estimated. The temporal evolution of the cluster jet generated at the backing pressure of 20 bar demonstrates a two-plateau structure. The possible mechanism responsible for this structure is discussed. The former plateau with higher average atom and cluster densities is more suitable for the general laser-cluster interaction experiments.

关键词： deuterium Jets Laser beams Pressure effects Rayleigh scattering

Preparation of Al2O3/Y2O3 composite coating for deuterium permeation reduction

在线全文

学校读者我要写书评

暂无评论

Journal of Rare Earths 2020年第11期38卷 1237-1242,I0004页

作者： Weijing Wang Qinghe Yu Xiaopeng Liu Zheng Lu National Engineering Research Center of Nonferrous Metals Materials and Products for New Energy GRINM Group Co.Ltd.Beijing 100088China GRIMAT Engineering Institute Co. Ltd.Beijing 101407China General Research Institute for Nonferrous Metals Beijing 100088China School of Materials Science and Engineering Northeastern UniversityShenyang 110819China

A tritium permeation barrier is required in fusion blankets for the reduction of fuel loss and radiological *** this study,an Al2O3/Y2O3 composite coating was prepared on 316 L stainless steel by radiofrequency magnetron sputtering in order to improve the tritium permeation *** microstructure and the phase composition of the Al2O3/Y2O3 composite coating are observed by scanning electron microscopy,transmission electron microscopy and grazing incidence X-ray ***,Auger electron spectroscopy was used to characterize the depth profiles of Al,Y and O *** results clearly indicate that the Al2O3/Y2O3 composite coating is fully dense and the total thickness is approximately 340 *** Al2O3/Y2O3 coating consists of an amorphous Al2O3 and the cubic Y2O3,in which Al,Y and O elements are homogeneously distributed in the vertical base ***,the deuterium permeation property of the Al2O3/Y2O3 composite coating was measured by the gas phase permeation *** results show that the introduction of an interface and the existence of a tiny amount of micro-defects improve the deuterium resistance of the Al2O3/Y2O3 coating,and its deuterium permeation reduction factor is 536-750 at 873-973 ***,it is concluded that the Al2O3/Y2O3 co mposite coating as deuterium permeation barrier can significa ntly enha nce the deuterium permeation resistance property.

关键词： deuterium Permeation barrier Al2O3 coating Y2O3 coating Composite coating Rare earths

Observation of deuterium molecule emission spectra under an active feedback control of H-mod plasma divertor detachment experiment on the EAST tokamak

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2019年第12期28卷 231-236页

作者： Wei Gao Juan Huang Jichan Xu Liang Wang Jing Zhang Jianxun Su Yingjie Chen Wei Gao Zhenwei Wu Institute of Plasma Physics Chinese Academy of SciencesHefei 230031China

Based on neon gas puffing, an active feedback control of H-mod plasma divertor detachment experiment was successfully operated on the EAST tokamak. During the feedback control discharge, the plasma was detached by puffing neon gas and the strike point splitting phenomenon on divertor target was also clearly observed by divertor probes *** boundary region, many neutral particle processes(atom and molecule) were happened and accompanied by their emission spectra under the detachment discharge. By studying these emission spectra, it is helpful for us to understand the role of atoms and molecules in boundary recycling, which is important for studying the physical mechanism of divertor detachment. For the Fulcher-α system(d(3 p)3Πu±→ a(2 s)3Σg+), D2 emission spectra in the range from 601 nm to 606 nm were observed, identified and fitted in the detachment experiment for the first time on the EAST, and the spectra in the Q(0–0) band(d3Πu-→ a(2 s)3Σg+) in the Q branch of the Fulcher-α system were used for detailed analysis to acquire the boundary region temperature Te(below 5eV), which could not be provided very well by other diagnostics on the EAST. An electronic version deuterium molecular spectral line database was established to identify the spectral lines and a multi-peak fitting program was developed to fit and analyze the observed spectra.

关键词： plasma detachment molecular spectrum deuterium

deuterium isotope effects in methane partial oxidation to syngas

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 1997年第7期42卷 566-570页

作者： AU Chak-tang Department of Chemistry Hong Kong Baptist Universtiy Kowloon Hong Kong

IN the past few years, there has been renewed interest in the partial oxidation of methane to syngas. The reaction is mildly exothermic and provides a H2/CO ratio of about 2,

关键词： deuterium isotope effects methane partial oxidation rhodium catalyst.

deuterium Absorbability and Anomalous Nuclear Effect of YBCO High Temperature Superconductors

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 1994年第2期39卷 101-103页

作者：金尚宪张富祥刘渝珍石万泉欧文刘世祥柳雪君 Graduate School University of Science and Technology of China Beijing 100039 PRC

1 Introduction In deeper study of HTSC, it is found that Y1Ba2Cu3O7-δ has an unusualproperty of absorbing hydrogen. The absorption process could be described by a gen-eral equation （x/2） H2 + Y1Ba2Cu3O7-δ→HxY1Ba2Cu3O7-δ.A structural analysis indicates that absorbed hydrogen is located on the Cu-Osurface and its state change with temperature. As an isotope of hydrogen,deuterium can have simlar effects. Therefore we have experimentally studied

关键词： high temnerature superconductor deuterium absorbability anomalous nuclear effect.

Investigation　of　deuterium　Isotope　Effects　in　the　Carbon　Dioxide　Reforming　of　Methaneto　Syngas　over　Rhodium　Catalysts

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 1996年第11期7卷 1047-1050页

作者： Wang, HY Au, CT XIAMEN UNIV DEPT CHEMXIAMEN 361005PEOPLES R CHINA HONG KONG BAPTIST UNIV DEPT CHEMKOWLOONHONG KONG

deuterium isotope effects in the CO2-reforming of methane to syngas were firstinvestigated over SiO2-supported rhodium catalysts. Normal deuterium isotop effect was morenoticeable on the methane conversion reaction than on the CO formation reaction, while there wasno such effect on the CO2 conversion reaction. It can be concluded that the dissociation of the C-Hbond in methane is a key mp and some CO is formed by the reverse water-gas shift reaction.

关键词： over Rhodium Syngas Investigation deuterium Carbon

Microstructure change in deuterium implanted CLAM steel induced by electron irradiation

在线全文

学校读者我要写书评

暂无评论

Science China(Physics,Mechanics & Astronomy) 2011年第1期54卷 111-114页

作者： HUANG YiNa WAN FaRong XIAO Xin OHNUKI Somei HASHIMOTO Naoyuki Department of Material Physics and Chemistry University of Science and Technology Beijing Beijing 100083 China Beijing Key Laboratory of New Energy and Technology Beijing 100083 China Faculty of Engineering Hokkaido University Sapporo 060-8628 Japan

As Reduced Activation Ferritic/Martensitic (RAFM) steel is considered the primary candidate for use as a structural material in fusion power reactors,many countries are developing different kinds of *** is developing new CLAM (China Low Activation Martensitic) *** study investigates microstructural changes in CLAM steel implanted with deuterium ions induced by 1250 keV electron irradiation from *** 873 K,and observes both the growth and shrinkage of the defect clusters produced by deuterium ion implantation under the electron irradiation.

关键词： low activation steel deuterium irradiation damage dislocation loop void

Synthesis of Tritium and deuterium Labelled Agmatine

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2006年第5期17卷 587-590页

作者： Hong Xia HE Zhi Bing ZHENG Lan Fu CHEN Zhan Bin ZHANG Chun HU Song LI Shenyang Pharmaceutical University Shenyang 110016 Beijing Institute of Pharmacology and Toxicology Beijing 100850 Beijing Normal University Beijing 100875

An efficient procedure for the synthesis of agmatine labelled with tritium and deuterium is reported. The final tritiated product 4 was obtained with a specific activity of 40 Ci/mmol and a radiochemical purity of 95%.

关键词： Agmatine labelled compound synthesis deuterium tritium.