Transport Dynamics and Multi-Scale Coupling of Turbulence in LHD
スポンサーリンク
概要
- 論文の詳細を見る
Spatiotemporal correlation of heat transport and micro- to meso- scale or macro-scale coupling of plasma turbulence are investigated in LHD plasmas, where fast propagation of a cold pulse and a non-local temperature rise are observed. Evidence of a timescale shorter than the diffusion time and a spatial scale longer than the micro-turbulence correlation length between core heat fluxes and edge temperature gradients is found. At the same time, an envelope of turbulent density fluctuations is also found to be modulated. Observation of low frequency (≤ 2 kHz) amplitude modulation of density fluctuation suggests the existence of meso- to macro-scale turbulent structures in the plasma, in which a non-local temperature rise takes place. Relationships between the turbulence with long radial correlation length and the edge-core coupling of heat transport are discussed.
著者
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KUBO Shin
National Insitute for Fusion Science
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SHIMOZUMA Takashi
National Insitute for Fusion Science
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KAWAHATA Kazuo
National Insitute for Fusion Science
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KOMORI Akio
National Insitute for Fusion Science
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IDA Katsumi
National Insitute for Fusion Science
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NAGAYAMA Yoshio
National Insitute for Fusion Science
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TOKUZAWA Tokihiko
National Insitute for Fusion Science
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Fujisawa Akihide
National Institute For Fusion Science
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NAGASHIMA Yoshihiko
RIAM, Kyushu University
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Tamura Naoki
National Institute For Fusion Science
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Itoh Kimitaka
National Inst. For Fusion Sci. Gifu
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KAWAI Yoshinobu
RIAM, Kyushu University, 6-1 Kasuga-Koen, Kasuga 816-8580, Japan
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MARUTA Takashi
IGSES, Kyushu University, 6-1 Kasuga-Koen, Kasuga 816-8580, Japan
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INAGAKI Shigeru
RIAM, Kyushu University, 6-1 Kasuga-Koen, Kasuga 816-8580, Japan
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YAMADA Takuma
RIAM, Kyushu University, 6-1 Kasuga-Koen, Kasuga 816-8580, Japan
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TERASAKA Kenichi
IGSES, Kyushu University, 6-1 Kasuga-Koen, Kasuga 816-8580, Japan
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SHINOHARA Shunjiro
IGSES, Kyushu University, 6-1 Kasuga-Koen, Kasuga 816-8580, Japan
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YAGI Masatoshi
RIAM, Kyushu University, 6-1 Kasuga-Koen, Kasuga 816-8580, Japan
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ITOH Sanae-I.
RIAM, Kyushu University, 6-1 Kasuga-Koen, Kasuga 816-8580, Japan
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KAWAHATA Kazuo
National Institute for Fusion Science,322-6 Oroshi-cho, Toki 509-5292, Japan
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NAGASHIMA Yoshihiko
RIAM, Kyushu University, 6-1 Kasuga-Koen, Kasuga 816-8580, Japan
関連論文
- Interferometry for Weakly Relativistic Plasmas
- Abrupt Flushing of High-Density Core in Internal Diffusion Barrier Plasmas and its Suppression by Plasma Shape Control in LHD
- Stability and Confinement Studies of High-Performance NBI Plasmas in the Large Helical Device Toward a Steady-State Helical Fusion Reactor
- Achievement of 10 keV Central Electron Temperatures by ECH in LHD
- Composition of Positive Ions in High-Density H_2 Plasmas Measured by Time-of-Flight Mass Spectrometry
- Measurement of Edge Density Profiles and Fluctuations in the H-Mode Discharge of the Compact Helical System (CHS) with a Thermal Neutral Lithium Beam Probe
- Retention and Desorption of Hydrogen and Helium in Inner Wall Material Used for The Large Helical Device (LHD) : Simulation experiments using a glow discharge apparatus
- Feasibility of Microwave Transmissivity Measurement to Obtain Density Profile of Sheet Plasmas
- Local Impurity Deposition in a Magnetic Island by Means of a Tracer-Encapsulated Solid Pellet in the LHD
- Analysis of Radial Electric Field Bifurcation in LHD Based on Neoclassical Transport Theory
- Nonthermal Titanium Kα Spectra from Lower-Hybrid-Current-Driven Plasmas in the JIPPT-IIU Tokamak
- Extension of Improved Particle and Energy Confinement Regime in the Core of LHD Plasma
- Clustered Data Storage for Multi-Site Fusion Experiments
- A Shift Down Test of Resonance Frequency for the Cascading Bifurcations to Chaos
- Retention and Desorption of Discharge Gases in Wall Materials Used for Large Helical Device
- Conceptual Design of a Dispersion Interferometer Using a Ratio of Modulation Amplitudes
- Improved Resolution and Stability in a Dispersion Interferometer Using a Modulation Amplitude Ratio
- Steady-State Operation Scenario and the First Experimental Result on QUEST
- 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
- Improvement in Plasma Heating at Higher-Density Region Using 106.4GHz Electron Cyclotron Heating System for Compact Helical System(Gases, plasmas, electric discharges, and beams)
- Statistical Estimation of Power Deposition Profile in Electron Cyclotron Heated Plasmas
- Band Rejection Filter for Measurement of Electron Cyclotron Emission during Electron Cyclotron Heating
- Electron Cyclotron Emission from Optically Thin Plasma in Compact Helical System
- Calibration Source for Electron Cyclotron Emission Measurements
- Feasibility of Electron Density Measurement Using Relativistic Downshift Frequency Effect of Electron Cyclotron Emission in Tokamak Plasmas
- Effects of Rotating Magnetic Islands Driven by External Perturbation Fields in the TU-Heliac
- Mode-Content Analysis and Field Reconstruction of Propagating Waves in Corrugated Waveguides of an ECH System
- Progress in Impurity-Related Physics Experiments in LHD
- Far Infrared Laser Diagnostics on the Compact Helical System
- Potential Measurement with the 6-MeV Heavy Ion Beam Probe of LHD
- Turbulence Response in the High Ti Discharge of the LHD
- Dynamic Transport Study of Electron Thermal Energy in Nonlinear Fusion Plasma
- Long Range Temperature Fluctuation in LHD
- Properties of Intermittent Bursts in Edge Plasma of LHD
- Estimation of the Effective Collective Thomson Scattering Volume Using a Gaussian Beam in the LHD ECRH System
- Neutral Gas Compression in the Helical Divertor with a Baffle Structure in the LHD Heliotron
- Electrostatic Potential Measurement by Using 6-MeV Heavy Ion Beam Probe on LHD
- Transport Dynamics and Multi-Scale Coupling of Turbulence in 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
- 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
- Experimental Conditions for Electron Bernstein Wave Heating Using EC Waves Injected from High-Field Side in CHS
- Collective Thomson Scattering Study Using Gyrotron in LHD
- Observation of Space and Energy Distributions of High Energy Electrons Produced in ECH Plasmas of LHD
- Development of a Plasma Diagnostics System Using an Impulse Waveform Voltage
- Improved Data Acquisition Methods for Uninterrupted Signal Monitoring and Ultra-Fast Plasma Diagnostics in LHD
- Bi-Coherence Analysis of Fluctuations with Long Distance Correlation in Toroidal Plasmas
- Modeling of OXB Mode Conversion Scenario for EBWH/CD Experiments in QUEST
- High-Density, Low Temperature Ignited Operations in FFHR
- Conceptual Design of Electron Density Measurement System for DEMO-Relevant Helical Plasmas
- Development of Collective Thomson Scattering Diagnostic for Bulk and Fast Ions in the Large Helical Device
- Improvements of CO2 Laser Heterodyne Imaging Interferometer for Electron Density Profile Measurements on LHD
- First Observation of ECH by Electron Bernstein Waves Excited via X-B Mode Conversion Process in LHD
- Present Status in the Development of 6 MeV Heavy Ion Beam Probe on LHD
- Nonstop Lose-Less Data Acquisition and Storing Method for Plasma Motion Images
- Experimental Study of Slow Cyclotron Maser Operation in Weakly Relativistic Region
- Design and Installation of a New Electron Cyclotron Emission Diagnostic Antenna in LHD
- First Demonstration of Rotational Transform Control by Electron Cyclotron Current Drive in Large Helical Device
- Design of Reflecting Mirrors for Electron Cyclotron Wave Launching System in GAMMA 10
- Improvement of Power Transmission for Fundamental Electron Cyclotron Resonance Heating System in GAMMA 10 Central Cell
- Composition of Positive Ions in High-Density H2 Plasmas Measured by Time-of-Flight Mass Spectrometry
- Formation of Electron-Root Radial Electric Field and its Effect on Thermal Transport in LHD High Te Plasma
- ECW/EBW Heating and Current Drive Experiment Results and Prospects for CW Operation in QUEST
- Simulation Studies on Advanced Microwave Diagnostics and Related Technology
- Broadband Multichannel Radiometer for ECE Measurements on KSTAR
- Pellet Injection and Internal Diffusion Barrier Formation in Large Helical Device
- Characteristics of Radiating Collapse at the Density Limit in the Large Helical Device
- Time Evolution of the Rotational Transform Profile in Current-Carrying LHD Plasmas
- Effect of Ellipticity on Thermal Transport in ECH Plasmas in LHD
- Electron Bernstein Wave Heating through Slow X-B Mode Conversion in CHS
- Dependence of EC-Driven Current on the EC-Wave Beam Direction in LHD
- O-X-B Heating of Overdense Plasmas by 54.5 GHz Electron Cyclotron Waves in CHS
- Density Control by Second Harmonic X-Mode ECRH in LHD
- Development of ECE Imaging System on 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
- ECCD Experiment Using an Upgraded ECH System on LHD
- Measurements of Micro-Turbulence in High Beta and High Density Regimes of LHD and Comparison with Resistive G-Mode Scaling
- Laser Scattering Measurement of the Electron Density Fluctuations in CHS
- High Power and High Efficiency Operation of 77 GHz Gyrotrons by Stepwise Raising of the Anode Voltage
- Advanced Laser Diagnostics for Electron Density Measurements
- Efficient Heating at the Third-Harmonic Electron Cyclotron Resonance in the Large Helical Device
- Bench Testing of New Polarimeter with Silicon Photoelastic Modulator for Short Wavelength FIR Laser
- Design of the 48, 57 μm Poloidal Polarimeter for ITER
- 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
- Instrumental Capabilities and Limitations of Two-Dimensional Phase Contrast Imaging on LHD
- Identification of Spurious Modes of High-Power 77-GHz Gyrotron for Collective Thomson Scattering in LHD
- Experimental Results for Electron Bernstein Wave Heating in the Large Helical Device
- ECCD Experiments in Heliotron J, TJ-II, CHS, and LHD
- Quasi-Optical High Purity HE11-Mode Exciter for Oversized Corrugated Waveguide Transmission
- Interpretation of Line-Integrated Signals from 2-D Phase Contrast Imaging on LHD
- Development of Short-Wavelength Far-Infrared Lasers and Optical Elements for Plasma Diagnostics
- Notch Filter in 70 GHz Range for Microwave Plasma Diagnostics
- Bifurcation-Like Behavior of Electrostatic Potential in LHD