Effect of Toroidal Current on Rotational Transform Profile by MHD Activity Measurement in Heliotron J

スポンサーリンク

概要

• 論文の詳細を見る

• The effect of toroidal current on the rotational transform was investigated in Heliotron J by measuring magnetohydrodynamic (MHD) activities at two configurations with a rotational transform (ι/2π) close to 0.5. The resonant m/n = 2/1 mode was observed in an ECH + co-NBI plasma in the configuration with ι/2π = 0.48 at ρ = 0.7. Here, m and n are the poloidal and toroidal mode numbers, respectively. ρ is the normalized minor radius. The rotational transform is increased presumably due to the toroidal current. The location of the ι/2π = 0.50 rational surface was determined to be ρ = 0.8-0.9 by soft X-ray (SX) fluctuations related to the MHD mode. An equilibrium calculation considering the toroidal current showed that the increase in the rotational transform due to the toroidal current was consistent with experimental results. The resonant mode structure was also investigated in an ECH + counter-NBI plasma at the ι/2π = 0.50 configuration. The location of the ι/2π = 0.50 rational surface, as determined by SX signals, did not change significantly compared with that obtained under a vacuum configuration. There is no significant difference between the rotational transform profile that considers toroidal currents by equilibrium calculation and that of the vacuum configuration. These results suggest that the change in the rotational transform profile caused by the toroidal current was small, owing to the balance between the bootstrap current and counter-flowing NB driven current.

著者

• SAKAKIBARA Satoru

  National Insitute for Fusion Science

• WATANABE Kiyomasa

  National Insitute for Fusion Science

• Mizuuchi Tohru

  Institute Of Advanced Energy Kyoto University

• Hanatani Kiyoshi

  Institute Of Advanced Energy Kyoto University

• NAGASAKI Kazunobu

  Institute of Advanced Energy, Kyoto University

• OKADA Hiroyuki

  Institute of Advanced Energy, Kyoto University

• KONDO Katsumi

  Graduate School of Energy Science, Kyoto University

• Suzuki Yasuhiro

  National Agriculture And Food Res. Organization (naro) National Inst. Of Crop Sci.

• Nakamura Yuji

  Graduate School Of Energy Science Kyoto University

• Kobayashi Shinji

  Institute Of Advanced Energy Kyoto Univ.

• Watanabe Shinya

  Graduate School of Dentistry (First Department of Oral and Maxillofacial Surgery), Osaka Dental University

• ARIMOTO Hajime

  Graduate School of Energy Science, Kyoto Univ., Gokasho, Uji 611-0011, Japan

• MOTOJIMA Gen

  Graduate School of Energy Science, Kyoto Univ., Gokasho, Uji 611-0011, Japan

• SANO Fumimichi

  Institute of Advance Energy, Kyoto University

• SANO Fumimichi

  Institute of Advanced Energy, Kyoto University, Uji 611-0011, Japan

• BLACKWELL Boyd

  Plasma Research Laboratory, Research School of Physical Sciences and Engineering, The Australian National University, Canberra ACT 0200, Australia

• YAMAMOTO Satoshi

  Kyoto University Pioneering Research Unit for Next Generation, Uji 611-0011, Japan

• KONDO Katsumi

  Graduate School of Energy Science, Kyoto Univ., Gokasho, Uji 611-0011, Japan

• YAMAMOTO Satoshi

  Kyoto University Pioneering Research Unit for Next Generation, Gokasho, Uji 611-0011, Japan

• HANATANI Kiyoshi

  Institute of Advanced Energy, Kyoto University, Uji 611-0011, Japan

• NAGASAKI Kazunobu

  Institute of Advanced Energy, Kyoto University, Uji 611-0011, Japan

• NAGASAKI Kazunobu

  Institute of Advance Energy, Kyoto University

• MIZUUCHI Tohru

  Institute of Advance Energy, Kyoto University

• MIZUUCHI Tohru

  Institute of Advanced Energy, Kyoto University, Uji 611-0011, Japan

• OKADA Hiroyuki

  Institute of Advance Energy, Kyoto University

• KOBAYASHI Shinji

  Institute of Advance Energy, Kyoto University

関連論文

• 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
• Increase of Central Ion Temperature after Carbon Pellet Injection in Ne-Seeded NBI Discharges of LHD
• Achievement of 10 keV Central Electron Temperatures by ECH in LHD
• 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
• Effect of Plasma Current on Magnetohydrodynamic Modes in Neutral Beam Heated Plasmas in Compact Helical System
• Experimental Observation of Magnetic Fluctuations in NBI Heated Plasmas in CHS
• Comparative Study on Effect of Boronization and Titanium Gettering in Compact Helical System Heliotron/Torsatron Device
• Effect of Rotational Transform and Magnetic Shear on Confinement of Stellarators
• Analysis of Radial Electric Field Bifurcation in LHD Based on Neoclassical Transport Theory
• Recent H-mode Results on ECH Plasmas in Heliotron J
• Tokamak Equilibria with Toroidal Flows
• Extension of Improved Particle and Energy Confinement Regime in the Core of LHD Plasma
• Identification of gene for rice (Oryza sativa) seed lipoxygenase-3 involved in the generation of stale flavor and development of SNP markers for lipoxygenase-3 deficiency
• Monte Carlo Study Based on a Real Coordinate System for Tangentially Injected High-Energy Particles in the Large Helical Device
• Analysis of Expression of Genes for Mitochondrial Aldehyde Dehydrogenase in Maize during Submergence and Following Re-aeration
• A rice mutant with enhanced amylose content in endosperm without affecting amylopectin structure
• Dependence of Plasma Profiles on Ech Power Absorption in Heliotron-E
• Enhancement and Suppression of Density Fluctuations around Electron Drift Frequency in Heliotron E Plasmas Measured Using CO_2 Laser Phase Contrast Method
• Experimental Investigation of the Fast Ion Orbit Shift and Loss Cone in Heliotron E
• Study of the Fast Ion Slowing-Down Process and ECRH Effects in Heliotron E
• Development of a Hierarchy-Integrated Simulation Code for Toroidal Helical Plasmas, TASK3D
• Possibility of LHD Equilibrium with Zero Rotational Transform Surface
• DC Power System for Superconducting Coils of Fusion Plasma Test Facility LHD
• An Optimized Helical Axis Stellarator with Modulated I = 1 Helical Coil
• Evaluation of a Quantitative Method for Trace Impurities in Arsenous Acids by Synchrotron Radiation X-ray Fluorescence Spectrometry and Inductively Coupled Plasma-Atomic Emission Spectrometry
• Molecular Characterization of Wx-mq, a Novel Mutant Gene for Low-amylose Content in Endosperm of Rice (Oryza sativa L.)
• Physics of Heliotron J Confinement
• Density Collapse and Fluctuation Observed in Poloidally Rotating Plasma on TU-Heliac
• Effects of Rotating Magnetic Islands Driven by External Perturbation Fields in the TU-Heliac
• Effects of Magnetic Islands Produced by External Perturbation Fields in the Tohoku University Heliac
• Forensic Discrimination of Sheet Glass by a Refractive-Index Measurement and Elemental Analysis with Synchrotron Radiation X-ray Fluorescence Spectrometry
• Nondestructive Analysis of Silver in Gold Foil Using Synchrotron Radiation X-ray Fluorescence Spectrometry
• Progress in Impurity-Related Physics Experiments in LHD
• Long Range Temperature Fluctuation in LHD
• Electron Heat Transport Analysis of Low-Collisionality Plasmas in the Neoclassical-Transport-Optimized Configuration of LHD
• A δf Drift-Kinetic Simulation for Off-Diagonal Neoclassical Transport Coefficients in Quasi-Symmetric Toroidal Configurations
• Effect of Toroidal Current on Rotational Transform Profile by MHD Activity Measurement in Heliotron J
• Measurement of Edge Plasma Heat Flux in Heliotron J Using a Thermal Probe
• Forensic Discrimination of Sheet Glass Exposed to High Temperature by the Determination of Trace Impurities Using ICP-MS
• Electron Density Profile Behavior during SMBI Measured with AM Reflectometer in Heliotron J Plasma
• Ballooning Modes Instabilities in Outward LHD Configurations
• Studies of MHD Stability Using Data Mining Technique in Helical Plasmas
• Configuration Effects on Local Transport in High-Beta LHD Plasmas
• Forensic Discrimination of Bottle Glass by Refractive Index Measurement and Analysis of Trace Elements with ICP-MS
• Forensic Discrimination of Lead-Tin Solder Based on the Trace Impurity Analysis by ICP-AES
• Experimental Conditions for Electron Bernstein Wave Heating Using EC Waves Injected from High-Field Side in CHS
• Particle Orbit Analysis in the Finite Beta Plasma of the Large Helical Device using Real Coordinates
• Polarizer Development for Electron Cyclotron Resonance Heating Systems in a HL-2A Tokamak
• Determination of Trace Impurities in Lead Shotgun Pellets by ICP-MS
• Effects of the Stochasticity on Transport Properties in High-β LHD
• Appropriate Criterion of Spontaneous Ignition of an Externally Heated Solid Fuel in Numerical Study
• MHD Instabilities in Current Carrying Heliotron Plasmas
• Monte-Carlo Study Based on Real Coordinates for Perpendicularly Injected High-Energy Ions in the LHD High-Beta Plasma
• Numerical Study of an In-line Pre-Heating Treatment along the Axis on the Propagation of a Laminar Premixed Flame in a Channel
• Numerical Investigation of the Effect of Ignition Area on the Subsequent Flame Propagation Behavior
• The Amylose Content and Amylopectin Structure Affect the Shape and Hardness of Rice Bread
• Advanced Probe Measurement System in TU-Heliac
• Genetic analysis of the low-amylose characteristics of rice cultivars Oborozuki and Hokkai-PL9
• Transport Study of LHD High-Beta Plasmas Based on Power Balance Analysis with TASK3D Code Module
• Effects of Water Soaking on Bread-Making Quality of Brown Rice Flour
• Development of Integrated Transport Code, TASK3D, and Its Applications to LHD Experiment
• Study of Plasma Current Decay in the Initial Phase of High Poloidal Beta Disruptions in JT-60U
• Numerical Analysis of ICRF Minority Heating in Helitoron J
• Control of Growth of Neoclassical Tearing Mode by Central Co-ECCD in JT-60U
• Effects of Magnetic Islands on Poloidal Flow in TU-Heliac
• First Demonstration of Rotational Transform Control by Electron Cyclotron Current Drive in Large Helical Device
• Nonlinear Simulation of Collapse Phenomenon in Helical Plasma with a Large Pressure Gradient
• Demonstration of a High-Field Short-Period Undulator Using Bulk High-Temperature Superconductor
• Density Regimes of Complete Detachment and Serpens Mode in LHD
• ECCD Experiments in Heliotron J: Recent Results Regarding the Dependence on Magnetic Configuration and Wave Polarization
• Identification of MHD Mode Structure using ECE and SX Measurements
• Change of Edge Plasma Distribution during a Discharge in Heliotron J
• Pellet Injection and Internal Diffusion Barrier Formation in Large Helical Device
• Time Evolution of the Rotational Transform Profile in Current-Carrying LHD Plasmas
• Ray Tracing Calculation of ECRH Power Absorption for Heliotron J.
• 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
• 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
• 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
• Measurement of Single Pass Electron Cyclotron (EC) Absorption Using Transmitted Waves in Heliotron J
• LHD Bootstrap Current Coefficient Calculations with the VENUS+δ f code
• Calibrations of Fast Ion Flux Measurement Using a Hybrid Directional Probe
• Analysis of Neutral Transport in GAMMA 10 SMBI Experiments
• Study of Magnetic Island Using a 3D MHD Equilibrium Calculation Code
• Bootstrap Current Simulations with Experimental LHD Plasma Density and Temperature Profiles, Energy Scattering and Finite Orbit Width
• Density Reconstruction Using a Multi-Channel Far-Infrared Laser Interferometer and Particle Transport Study of a Pellet-Injected Plasma on the LHD
• Performance Improvement in Real-Time Mapping of Thomson Scattering Data to Flux Coordinates in LHD
• Experimental Studies of Helical Nonneutral Plasmas with a Helical Magnetic Axis
• Experimental Study of Plasma Breakdown by Toroidally Injected Electron Cyclotron Waves in Heliotron J
• Measurement of Ion Temperature and Toroidal Rotation Velocity Using Charge Exchange Recombination Spectroscopy in Heliotron J
• Recent Fusion Research in the National Institute for Fusion Science
• Comparative Study of Magnetic Field Configurations of LHD and CHS based on the Boundary Shape Analysis
• Effects of Toroidal Field Ripples on the Bootstrap Current in Tokamaks

もっと見る 閉じる

スポンサーリンク