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Observation of the Two-Dimensional Distribution of Impurity Line Emissions Using a space-Resolved EUV spectrometer in LHD

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Plasma science and Technology 2013年第2期15卷 106-109页

作者：王二辉 s.morita M.GOTO 董春凤 Department of Fusion science Graduate University for Advanced StudiesToki 509-5292Gifu Japan National Institute for Fusion science Toki 509-5292 Gifu Japan

A space-resolved EUV spectrometer for measuring the one-dimensional distribution of impurity line emissions in Large Helical Device （LHD） has been upgraded to measure two- dimensional distributions of impurity line emissions with an extension of working wavelength range to 30-650% The two-dimensional measurement is performed by scanning the observation chord horizontally. A rectangular plasma region of 520 × 700 mm2 in vertical and horizontal sizes can be observed during a single horizontal scan. The horizontal scan requires a time duration of 5 s at least. The spatial resolution is 10 mm in the vertical direction when a spatial-resolution slit of 0.2 mm in width is adopted. Although a spatial resolution in the toroidal direction is 75 mm, it is a function of CCD exposure time and horizontal scanning speed. Two-dimensional distribution of EUV line emissions from several impurities has been successfully observed for the first time from steady discharges in LHD. In this paper two-dimensional distributions of He II （303.78A）, C V （40.27A）, C VI （33.73A） and Fe XX （132.85A） located at different radial positions are presented with simple analysis on the magnetic field structure of LHD.

关键词： EUV spectrometer impurity line emission two-dimensional distribution

space-Resolved VUV and EUV spectrometers in HL-2A

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Plasma science and Technology 2013年第2期15卷 110-114页

作者：崔正英周航宇 s.morita 傅炳忠孙平高亚东 M.GOTO 徐媛董春凤杨青巍 southwestern Institute of Physics Chengdu 610041 China National Institute for Fusion science Toki 509-5292 Gifu Japan

A normal incidence vacuum ultraviolet （VUV） and a grazing incidence extreme ultraviolet （EUV） spectrometers have been developed for the edge and core impurity measure- ments in HL-2A tokamak. The VUV and the EUV spectrometers cover wavelength ranges of 300-3200 A and 50-500A, respectively. A spatial resolution of 2 mm has been achieved for the VUV spectrometer when a space-resolved slit 50 #m in width is used. The space-resolved slit is placed between the entrance slit and the grating of the spectrometer. The spectral resolutions of 0.15/~ for the VUV spectrometer in the wavelength coverage of the concave 1200 grooves/mm grating and of 0.22A for the EUV spectrometer at λ=200A with a flat-field laminar-type holo- graphic grating are obtained. The sensitivity of the VUV spectrometer was calibrated in situ with the plasma bremsstrahlung radiation. The experimental results from both spectrometers are presented, especially the line intensity radial profiles measured by the VUV spectrometer.

关键词： VUV spectra EUV spectra spectrometer spatial resolution

Refueling for steady-state Plasma by Repetitive Pellet Injection in Large Helical Device

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Plasma science and Technology 2004年第3期6卷 2275-2280页

作者： H.Yamada R.sakamoto I.Viniar M.Goto K.Kikuchi A.Lukin s.Masuzaki J.Miyazawa s.morita Y.Oda s.sudo K.Tanaka National Institute for Fusion science Toki Japan PELIN Laboratory Ltd. Moscow Russia Mitsubishi Heavy Industries Ltd. Kobe Japan

A repetitive pellet injector has been developed for investigation ofrefueling issues towards the steady-state operation in Large Helical Device (LHD). Continuousoperation of more than 10000 pellet launching at 10 Hz has been demonstrated. The maximum repeatingrate is 11 Hz. No technical constraint for longer operation has been found. The reliability ofpellet launch has exceeded 99.9%. The initial application to the NBI-heated plasmas has beensuccessful in the last experimental campaign of LHD. Although the pulse length is limited by theoperational constraint of NBI, the plasma with a density of 8 X 10^(19) m^(-3) has been sustainedfor 2 s by the pellet injection at 10 Hz. A prospect for the future experiment is discussed on thebasis of the initial result.

关键词： cryo-cooler screw extruder solid hydrogen

Effect of Ne Glow Discharge on Ion Density Control in LHD

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Plasma science and Technology 2004年第5期6卷 2440-2444页

作者： s.morita M.Goto s.Masuzak H.suzuki K.Tanaka H.Nozato Y.Takeiri J.Miyazawa LHD experimental group National Institute for Fusion science Toki 509-5292Gifu Japan College of Engineering Chubu UniversityKasugai 487-8501AichiJapan science and Technology Center for Atoms Molecules and Ions ControlsOsaka UniversitySuita 565-0871OsakaJapan

Neon glow discharge cleaning was firstly attempted in Large Helical Device(LHD) instead of He glow discharge to remove hydrogen neutrals and to control the ion density, n_*** Ne glow discharge continued for 8 hours overnight after a three-day experiment. At the secondnight H_α emission became weaker than the emission usually observed in the He glow discharge. Aclear reduction of the hydrogen influx was also observed in neutral beam injection (NBI) dischargeswith Ne puff, whereas the neon recycling was strongly enhanced with appearance of a flat densityprofile. As a result, the lowest density limit was further reduced down to 0.2 X 10^(13)cm^(-3). Theuse of Ar puff formed a peaked density profile with a high T_i of 7 keV.

关键词： hydrogen recycling Ne glow discharge ion density

Progress of LHCD and IBW Heating Experiments on HT-7 Tokamak

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Plasma science and Technology 2009年第4期11卷 381-384页

作者：高翔赵燕平袭先祖胡立群单家方 K.TOI s.morita 刘瑾许平徐强刘海庆杨建华万宝年李建刚 Institute of Plasma Physics Chinese Academy of Sciences National Institute for Fusion science Yunnan University

Experimental progress of lower hybrid current drive （LHCD） and ion Bernstein wave （IBW） heating was achieved significantly in HT-7. Long pulse plasmas, up to 400 s, were obtained by LHCD. High power lower hybrid wave （LHW）, with PLHW of 800 kW at 2.45 GHz, was launched and the current drive efficiency was studied for different wave powers. Electron temperature and Zeff were measured in LHCD discharges. Heating experiment and recent results of high power ion Bernstein wave, with PIBW of 600 kW at 27 MHz, were summarized.

关键词： LHCD IBW heating long duration

MHD Instabilities and Their Effects on Plasma Confinement in Large Helical Device Plasmas with Intense Neutral Beam Injection

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Plasma science and Technology 2004年第3期6卷 2269-2274页

作者： K.Toi s.Ohdachi s.Yamamoto s.sakakibara K.Y.Watanabe N.Nakajima X.Ding J.Li s.morita K.Narihara K.Tanaka T.Tokuzawa H.Yamada Q.Yang National Institute for Fusion science Toki 509-5292 Japan Dep. Energy Eng. sci. Nagoya Univ. Nagoya 464-8603 Japan southestern Institute of Physics Chengdu China Institute of Plasma Physics Chinese Academy of Science China

MHD stability of the Large Helical Device (LHD) plasmas produced with intenseneutral beam injection is experimentally studied. When the steep pressure gradient near the edge isproduced through L-H transition or linear density ramp experiment, interchange-like MHD modes whoserational surface is located very close to the last closed flux surface are strongly excited in acertain discharge condition and affect the plasma transport appreciably. In NBI-heated plasmasproduced at low toroidal field, various Alfven eigenmodes are often excited. Bursting toroidalAlfven egenmodes excited by the presence of energetic ions induce appreciable amount of energeticion loss, but also trigger the formation of internal and edge transport barriers.

关键词： interchange instabilities L-H transition alfven eigenmodes

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应用有限元模型计算气缸体放射噪声

国外汽车 1986年第3期 62-67页

作者： K.Maekawa s.morita 王瑄

一、前言缸体对发动机产生噪声的影响最大,山于其结构复杂,用简单的计算方法来预测缸体产生的噪声和振动是困难的。目前,有限元、模态试验分析和激光全息摄影的应用已日渐增加。

关键词：噪声缸体噪音声功率有限元模型

Natural Convection Melting in a Rectangular Heat storage Tank of Carbon Nanotube Dispersed Latent Heat storage Material

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Journal of Thermal science 2024年第3期33卷 847-855页

作者： shin-ichi morita Tomoya sAITO Kazunori TAKAI Yasutaka HAYAMIZU Naoto HARUKI Division of Mechanical and Electrical Engineering Kitami Institute of Technology165 Koen-choKitami-shiHokkaido090-8507Japan National Institute of Technology Yonago College4448 Hikona-cyoYonago-shiTottori683-8502Japan Okayama Prefectural University 111 KubokiSoja-shiOkayama719-1197Japan

A dispersion system fluid can convect even if the dispersoid is a solid ***,heat exchange performance can be improved while maintaining fluidity using a material with high thermal conductivity as the *** study presents the melting performance evaluation results of a latent heat storage material with a carbon nanotube(CNT)dispersion system with high thermal conductivity,which enhances the thermal conductivity of the latent heat storage material and does not limit free *** the thermal conductivity and enhancing the melting convection of the heat storage material result in increased latent heat storage *** this study,the thermal conductivity of the latent heat storage material was successfully increased by dispersing CNTs in the *** 0.1%(in mass)of multi-wall CNT(MWCNT)was dispersed in a paraffin-based latent heat storage material,the shear stress increased by 1.5 times at a shear rate of 500 s^(-1),while taking into account the potential effects of convective ***,a latent heat storage experiment was conducted in a rectangular heat storage tank using the CNT dispersion composition ratio as a parameter.A rectangular vessel with a heated vertical surface was used for the latent heat storage *** melting speed was determined by comparing the amount of latent heat stored in a CNT-dispersed latent heat storage material and a single-phase latent heat storage material *** experimental results show that the time required for the latent heat storage material to completely melt in the heat storage tank was the shortest for the single-phase latent heat storage material ***,the fastest melting progress was observed for the sample with 0.02%(in mass)MWCNT content in the melting rate range of up to approximately 40%in the *** results indicate that this phenomenon is caused by the difference in the melting rates in the upper part of the *** generated data are useful for det

关键词： latent heat storage phase change carbon nano tube free convection heat transfer

Detection and clearance in Alzheimer’s disease: leading with illusive chemical, structural and morphological features of the targets

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Neural Regeneration Research 2024年第3期19卷 497-498页

作者： Luís Gales i3s−Instituto de Investigação e Inovação em saúde Rua Alfredo AllenPortoPortugal(Gales L)IBMC−Instituto de Biologia Molecular e CelularUniversidade do PortoRua Alfredo AllenPortoPortugal ICBAs−Instituto de Ciências Biomédicas Abel salazar Rua de Jorge Viterbo FerreiraPortoPortugal

Highly specific interactions between biomolecules,such as antigen-antibody,protein-ligand,or nucleic acid base pair complementary are on the basis of the organization of complex *** same principles may be tentatively used in molecular medicine for diagnosis and therapeutics.A molecule can be designed to selectively bind a protease and thereby inhibit the production of a peptide that forms toxic aggregates in the brain or an antibody may be produced to bind specifically to that peptide for detection or clearance ***,interference in biological systems is not that *** a start there is the inhibition of the physiological role of the protease;moreover,several cleavage fragments may be produced,which may continue to diverge due to putative post-translational modification and self-assembly processes,hiding the toxic target in a“soup”of peptide species varying in size,structure and chemical composition.A perspective of the current status and challenges in targeting peptide species for diagnosis and treatment in the context of Alzheimer’s disease is given.

关键词： Alzheimer diagnosis thereby