Development of a Two-Dimensional Thomson Scattering Diagnostic System involving Use of Multiple Reflection and the Time-of-Flight of Laser Light
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概要
- 論文の詳細を見る
Two-Dimensional Thomson Scattering Measurement (2-D TS) was designed using multiple reflections and the time-of-flight of laser light. This new approach enable us to measure the r(radial)-z(axial) profiles of electron temperature and density. In this approach, (1) multiple reflections of YAG laser light are used to cover the whole r-z plane of the ST (Spherical Tokamak) plasma, and (2) the time delay of the scattered light along the laser beam is arbitrarily arranged by adjusting the multiply reflected laser light path in order to reduce the necessary number of detectors. Rayleigh scattering lights were observed successfully at two measurement points, suggesting that the basic principle of the 2-D Thomson scattering system functions effectively as a new extension of LIDAR (LIght Detection And Ranging) Thomson scattering system.
- 社団法人 プラズマ・核融合学会の論文
著者
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TOKUZAWA Tokihiko
National Insitute for Fusion Science
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Kawamori Eiichirou
High Temperature Plasma Center University Of Tokyo
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ONO Yasushi
Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa 277-8561, Japan
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SUMIKAWA Takashi
Graduate School of Frontier Science, the University of Tokyo
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YAMASHITA Kouhei
Graduate School of Frontier Science, the University of Tokyo
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KAWAMORI Eiichirou
High Temperature Plasma Center, the University of Tokyo
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ONODA Manabu
Graduate School of Frontier Science, the University of Tokyo
関連論文
- Achievement of 10 keV Central Electron Temperatures by ECH in LHD
- Extension of Improved Particle and Energy Confinement Regime in the Core of LHD Plasma
- Initial Measurements from an Ultrashort-Pulse Reflectometer on GAMMA 10
- Ion Kinetic Relaxation of Two Merging Spheromaks to an FRC
- Progress in Impurity-Related Physics Experiments in LHD
- Merging Startup Experiments on the UTST Spherical Tokamak
- Potential Measurement with the 6-MeV Heavy Ion Beam Probe of LHD
- Long Range Temperature Fluctuation in LHD
- Transport Dynamics and Multi-Scale Coupling of Turbulence in LHD
- Particle Transport and Fluctuation Characteristics around the Neoclassically Optimized Configuration in LHD
- Configuration Effects on Local Transport in High-Beta LHD Plasmas
- Low Frequency Magnetic Fluctuations during Magnetic Reconnection in Laboratory Experiment
- Magnetic Helicity Injection Mechanism for Double-Null Startup of the UTST Spherical Tokamak Plasmas
- Development of a Plasma Diagnostics System Using an Impulse Waveform Voltage
- Evaluation of Fast-Ion Confinement Using a Radially Injected Neutral Beam in the LHD
- Bi-Coherence Analysis of Fluctuations with Long Distance Correlation in Toroidal Plasmas
- Conceptual Design of Electron Density Measurement System for DEMO-Relevant Helical Plasmas
- Improvements of CO2 Laser Heterodyne Imaging Interferometer for Electron Density Profile Measurements on LHD
- Present Status in the Development of 6 MeV Heavy Ion Beam Probe on LHD
- First Demonstration of Rotational Transform Control by Electron Cyclotron Current Drive in Large Helical Device
- Merging Experimental Study of High-Beta ST Formation for Non-Inductive Plasma Start-Up Assisted by NBI in TS-4
- Density Regimes of Complete Detachment and Serpens Mode in LHD
- Multipoint Spectroscopy Measurement of Spherical Tokamak Heating by Magnetic Reconnection in UTST
- Characteristics of Radiating Collapse at the Density Limit in the Large Helical Device
- Effect of Ellipticity on Thermal Transport in ECH Plasmas in LHD
- Effects of Resonant Magnetic Fluctuations on Plasma Confinement in Current Carrying high-β Plasmas of LHD
- Onset of Resistive Interchange Mode in the Large Helical Device
- Development of 2-D Thomson Scattering Measurement Using Multiple Reflection and the Time-of-Flight of Laser Light
- Observation of the Effect of Energetic Ions on Pellet Ablation in the Large Helical Device
- Reconstruction of Edge Density Profiles Using Ultrashort-Pulse Reflectometry in LHD
- Density Reconstruction Using a Multi-Channel Far-Infrared Laser Interferometer and Particle Transport Study of a Pellet-Injected Plasma on the LHD
- Observation of the Internal Structure of Energetic Particle-Driven MHD Modes in a Large Helical Device
- Performance Improvement in Real-Time Mapping of Thomson Scattering Data to Flux Coordinates in LHD
- Plasma Diagnostics Required for a Heliotron-Type DEMO Reactor
- Development of a Two-Dimensional Thomson Scattering Diagnostic System involving Use of Multiple Reflection and the Time-of-Flight of Laser Light
- Development of Short-Wavelength Far-Infrared Lasers and Optical Elements for Plasma Diagnostics
- Plasmoid-Induced Pull Reconnection Experiments in University of Tokyo Spherical Tokamak
- Initiation of Impulsively Fast Magnetic Reconnection Induced by Current Sheet Ejection