Development of 2-D Thomson Scattering Measurement Using Multiple Reflection and the Time-of-Flight of Laser Light
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概要
- 論文の詳細を見る
A new two-dimensional Thomson scattering measurement (2-D TS) system has been developed using multiple reflections and time-of-flight (TOF) of laser light. Its new ideas of our 2-D TS system are (1) to reflect YAG laser light for multiple times to cover the whole r - z plane of the ST (Spherical Tokamak) plasma, and (2) to reduce the number of polychromators and detectors using the time delay of the scattered light along the laser beam. We measured for the first time, Rayleigh scattering light signals with 50 ns time difference from two measurement points using a single detector, demonstrating the basic principle of the 2-D 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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NARIHARA Kazumichi
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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NARIHARA Kazumichi
National Institute for Fusion Science, Toki 509-5292, Japan
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SUMIKAWA Takashi
Graduate School of Frontier Science, the University of Tokyo, Tokyo 113-8656, Japan
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YAMASHITA Kouhei
Graduate School of Frontier Science, the University of Tokyo, Tokyo 113-8656, 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
関連論文
- Abrupt Flushing of High-Density Core in Internal Diffusion Barrier Plasmas and its Suppression by Plasma Shape Control in LHD
- Achievement of 10 keV Central Electron Temperatures by ECH in LHD
- Analysis of Radial Electric Field Bifurcation in LHD Based on Neoclassical Transport Theory
- Extension of Improved Particle and Energy Confinement Regime in the Core of LHD Plasma
- Impurity Retention Effect in the Edge Ergodic Layer of the Large Helical Device
- Construction of a 100-Hz-Repetition-Rate 28-Channel Thomson Scattering System for the JIPPT-IIU Tokamak
- Steady-State Tokamak Operation by Use of Magnetic Monopoles
- In Situ Laser Beam Alignment for Thomson Scattering System
- Application of Zeff Profile Analysis Based on Visible Bremsstrahlung Measurement to Different Density Profiles in the LHD
- 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
- Electrostatic Potential Measurement by Using 6-MeV Heavy Ion Beam Probe on LHD
- Electron Heat Transport Analysis of Low-Collisionality Plasmas in the Neoclassical-Transport-Optimized Configuration of LHD
- Measuring Electron Temperature in the Tandem Mirror GAMMA 10 Plasma Using a Yttrium-Aluminum-Garnet Thomson Scattering System
- Development of a Bright Polychromator for Thomson Scattering Measurements
- Particle Transport and Fluctuation Characteristics around the Neoclassically Optimized Configuration in LHD
- Improvement of Ion Confinement in Core Electron-Root Confinement (CERC) Plasmas in Large Helical Device
- 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
- Present Status in the Development of 6 MeV Heavy Ion Beam Probe on LHD
- Effects of Plasma Radiation on the Thomson Scattering Diagnostic Installed on the Large Helical Device
- Electron Temperature Measurement on QUEST Spherical Tokamak by Thomson Scattering System
- 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
- Coaxial Multiple Laser Beam Combiner for the LHD Thomson Scattering System
- Multipoint Spectroscopy Measurement of Spherical Tokamak Heating by Magnetic Reconnection in UTST
- Pellet Injection and Internal Diffusion Barrier Formation in Large Helical Device
- Characteristics of Radiating Collapse at the Density Limit in the Large Helical Device
- Dependence of EC-Driven Current on the EC-Wave Beam Direction in LHD
- Observation of Minor Collapse of Current-Carrying Plasma in LHD
- New Calibration Method of Magnetic Measurements Based on the MHD Equilibrium with the Ergodic Region
- Raman and Rayleigh Calibrations of the LHD YAG Thomson Scattering
- 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
- ECCD Experiment Using an Upgraded ECH System on LHD
- 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
- Direct Observation of Inward Electron Flux being Blocked in the Large Helical Device
- Performance Improvement in Real-Time Mapping of Thomson Scattering Data to Flux Coordinates in LHD
- Development of a Two-Dimensional Thomson Scattering Diagnostic System involving Use of Multiple Reflection and the Time-of-Flight of Laser Light
- Plasmoid-Induced Pull Reconnection Experiments in University of Tokyo Spherical Tokamak
- Initiation of Impulsively Fast Magnetic Reconnection Induced by Current Sheet Ejection
- Injection and Confinement of a Laser Pulse in an Optical Cavity for Multi-Pass Thomson Scattering Diagnostics in the TST-2 Spherical Tokamak Device