工学部 研究紹介_2018_英語版

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ITER is the world's largest experimental fusion reactor, which is now under construction at the Cadarachefacility in France.http://www.iter.org/gallery/com_image_downloadThe ITER Organization provides images and videos on its public website free of charge for educational and institutional use.We are studying the atoms and molecules in the near-wall region by constructing numerical codes that simulate their reaction processes. The codes have been used in the design of ITER: ITER is intended to prove the viability of fusion as an energy source, and to collect the data necessary for the design and operation of the first fusion power plant.RF plasma device in our laboratory is used to test our codes by comparing the calculated and observed photoemission intensities of the atoms and molecules.RF plasma device in our laboratory.Reaction processes of atoms and molecules.Realizing NuclearFusionEnergyModellingof Hydrogen and Helium in Fusion PlasmaThe most exciting application of plasmas is the production of power from thermonuclear fusion. Fusion plasmas give off large amounts of heat and very energetic particles. However, they damage the surfaces of the reactor walls.The protection of the walls is one of the remaining critical issues for the realization of fusion plants. Neutral atoms and molecules in the near-wall region of fusion plasmas are expected to act as buffers. Thus it is important to understand the reaction processes of these atoms and molecules. KeijiSawadaProfessorReceived his doctor's degree (engineering) at Kyoto University in 1994.SawadaLabIn the FutureMechanical Systems EngineeringInturbulence,three-dimensionalandtangleddisturbancesarealternatingceaselessly.OurcurrentchallengeistoelucidatecoherentstructuresinturbulentshearflowsbymeansofaMEMSmicrophonearrayandhotwireanemometrythatcancaptureastreakstructurenearthewallaswellashair-pinvortices.Inaddition,‘laminar-turbulenttransition,’whichonecanregardasembryologyofturbulence,isalsoinvestigatedusingflakeparticlesandahigh-powerlasersheet.‘Turbulence’isanold,butnewproblem.Itisoneofthemostfundamentalsubjectsthatpersistsfromthe20thcentury.Researcherallovertheworldaretryingtounderstand“turbulence”usingsupercomputersandover-100-meterwindtunnelfacilitiesintherecentyears.Inordertoapproachtheessenceofaturbulentflow,weparticipateintheinternationaljointresearchCICLoPEandwesharethegiganticpipeflowfacility.MasaharuMatsubaraProfessorPostdoctoral in KTH(Stockholm) and Tohoku Univ.The current title from 2014. His main interest is turbulence in his main resercharea, fluid dynamics.Array of MEMS micro sensors. Spanwiseintervals are 0.8 mm and a diameter of a hole is 0.5 mm. A hot wire at the left end of the array has a2.5 mm diameter sensor.Capturing ‘Coherent Structures’ in Turbulence by MEMS SensorsFlow visualization of laminar-turbulence intermittent flow. Flake-suspended water flows between glass plates apart 7 mm.Inourfluiddynamicsexperiments,wemeasuretheflowfieldsusingandcontrollingmanykindsofopticalandacousticdevicesaswellasstandardanemometers.Ourgraduateswithsuchexperiencesarehighlyactiveinthedevelopmentoffluidmachineries.MatsubaraLabIn the FutureMechanical Systems EngineeringAfter Graduation51