Excitation of Stable Alfvén Eigenmodes by Application of Alternating Magnetic Field Perturbations in the Compact Helical System
スポンサーリンク
概要
- 論文の詳細を見る
Alternating magnetic perturbations, generated by external electrodes, are applied to a neutral-beam-heated plasma in the Compact Helical System, to excite stable Alfvén eigenmodes (AEs). Resonant peaks in the frequency range of the toroidal Alfvén eigenmode (TAE) have been observed in a transfer function defined by the ratio between the magnetic probe signal and the alternating electrode current. The resonant frequency fo agrees well with that of the TAE gap located near the plasma edge, where the strength of energetic ion drive of AEs will be sufficiently low. The damping rates γ derived from the width of the resonant peak are fairly large, i.e., γ/(2π fo) ∼ 20%.
著者
-
ISOBE Mitsutaka
National Insitute for Fusion Science
-
MINAMI Takashi
National Insitute for Fusion Science
-
TOI Kazuo
National Insitute for Fusion Science
-
Akiyama Tsuyoshi
National Cardiovascular Center
-
Ito Takafumi
Department Of Applied Physics Nagoya University
-
NAGAOKA Kenichi
National Institute for Fusion Science
-
ITO Takafumi
Department of Energy Engineering and Science, Nagoya University,Furo-cho, Chikusa-ku, Nagoya City, Aichi 464-8601, Japan
-
MATSUNAGA Go
Japan Atomic Energy Agency
-
MATSUNAGA Go
Japan Atomic Energy Agency, 801-1 Mukouyama, Naka, Ibaraki 311-0193, Japan
関連論文
- Excitation of Stable Alfvén Eigenmodes by Application of Alternating Magnetic Field Perturbations in the Compact Helical System
- 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
- 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
- Nonthermal Titanium Kα Spectra from Lower-Hybrid-Current-Driven Plasmas in the JIPPT-IIU Tokamak
- Transition of Edge Particle Transport in CHS
- Extension of Improved Particle and Energy Confinement Regime in the Core of LHD Plasma
- Multi-Channel Neutron Emission and Triton Burn-up Measurement on JT-60U Using Digital Signal Processors
- Causal Relationship between Zonal Flow and Turbulence in a Toroidal Plasma(Gases, plasmas, electric discharges, and beams)
- Neutron and Fast Atom Spectrometry Using Natural Diamond Detectors
- 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
- IN VIVO MONITORING OF LOCAL MYOCARDIAL INTERSTITIAL ACETYLCHOLINE BY DIALYSIS TECHNIQUE
- -209- IMPAIRED LEFT VENTRICULAR DIASTOLIC FUNCTION DURING VASOSPASM STUDIED BY PULSED DOPPLER ECHOCARDIOGRAPHY : Cardiac : FREE COMMUNICATIONS(I) : PROCEEDINGS OF THE 51th ANNUAL SCIENTIFIC MEETING OF THE JAPANESE CIRCULATION SOCIETY
- Construction of a 100-Hz-Repetition-Rate 28-Channel Thomson Scattering System for the JIPPT-IIU Tokamak
- Excitation of Stable MHD Mode Using Electrodes on the Compact Helical Sytem Plasmas
- Reconstruction of Local Emissivity Profile from Chord-Integrated Soft X-Ray Data in Heliotron/Torsatron Plasmas by Singular-Value Decomposition
- 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
- Possibility of LHD Equilibrium with Zero Rotational Transform Surface
- IN VIVO SYMPATHETIC INTERVENTION IN ACETYLCHOLINE RELEASE IN THE LEFT VENTRICLE
- The Involvement and Sources of Active Oxygen in Experimentally Induced Acute Pancreatitis
- Physics of Heliotron J Confinement
- Effect of Magnetic Island Associated with Neoclassical Tearing Modes on Plasma Rotation in JT-60U
- 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
- Parameter Regime of Ion Internal Transport Barrier Formation in the Large Helical Device
- Bird Fanciers Lung Which Developed in a Pigeon Breeder Presenting Organizing Pneumonia
- Observation of Edge Reynolds Stress Increase Preceding an L-H Transition in Compact Helical System
- AN ATTEMPT AT SPECTRAL DETECTION OF PHENOLOGICAL CHANGES OF BOREAL VEGETATION (15th Symposium on Polar Biology)
- Measurement of Edge Plasma Heat Flux in Heliotron J Using a Thermal Probe
- Density Regimes of Low-Aspect-Ratio RFP Plasmas in RELAX
- Different Risk Factors for the Maximum and the Mean Carotid Intima-media Thickness in Hemodialysis Patients
- Studies of MHD Stability Using Data Mining Technique in Helical Plasmas
- Physics Mechanisms of Toroidal Rotation Profile and Properties of Momentum Transport in JT-60U
- 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
- SERRATED ADENOMA OF THE INVERTED VERMIFORM APPENDIX SHOWING A GIGANTIC PEDUNCULATED POLYP-LIKE APPEARANCE
- Discriminating Acquisition of 15-MeV Protons from D-3He Fusion Reaction in LHD
- Experimental Conditions for Electron Bernstein Wave Heating Using EC Waves Injected from High-Field Side in CHS
- Triggering Instability of Sawtooth Crash in NBI-Heated Plasmas of CHS Heliotron/Torsatron
- Transition of Toroidal Alfvén Eigenmode to Global Alfvén Eigenmode in CHS Heliotron/Torsatron Plasmas Heated by Neutral Beam Injection
- Optical Measurement of Cesium Behavior in a Large H− Ion Source for a Neutral Beam Injector
- Evaluation of Fast-Ion Confinement Using a Radially Injected Neutral Beam in the LHD
- Role of Negative Potential Barrier Formed by Electrons Confined in the Stochastic Magnetic Region of Helical Nonneutral Plasmas
- Design Study of a Lost Fast-Ion Probe in Large Helical Device
- Beam Ion Losses Caused by Magnetic Field Ripples in Various Plasma Parameter Ranges in the Large Helical Device
- Conceptual Design of Electron Density Measurement System for DEMO-Relevant Helical Plasmas
- Experimental Check of Deceleration of Neutral Beam-Injected Energetic Ions in the HL-2A Tokamak
- A Quasi-Coherent Electrostatic Mode in ECRH Plasmas on TJ-II
- Observation of Fast Ion Losses Induced by Various MHD Modes Driven by Fast Ions and Bulk Plasma Pressure in the Large Helical Device
- Design Consideration on Compact Neutron Pinhole Camera with Nuclear Emulsion for Energetic-Ion Profile Diagnostics
- Present Status in the Development of 6 MeV Heavy Ion Beam Probe on LHD
- Study on the Calibration of LHD Neutron Monitoring System
- Study of Edge Transport Barrier Formation on CHS Plasma
- Two-Dimensional Measurement of Electron Density Profile in the Edge Region of the Large Helical Device Plasma by a Sheet-Shaped Thermal Lithium Beam
- Characterization of Ion Cyclotron Wall Conditioning Using Material Probes in LHD
- Neutron Emission Profile Measurement and Fast Charge Exchange Neutral Particle Flux Measurement for Transport Analysis of Energetic Ions in JT-60U
- Room-Temperature Current Oscillation Based on Negative Differential Resistance in a One-Dimensional Organic Charge-Transfer Complex
- Energetic-Ion-Driven Global Instabilities Observed in the Large Helical Device and Their Effects on Energetic Ion Confinement
- Successful Use of Maintenance Infliximab for Nephropathy in a Patient with Secondary Amyloidosis Complicating Crohn's Disease
- Fast-Ion-Diagnostics for CHS Experiment
- Escaping Ion Measurement with High Time Resolution during Bursting Modes Induced by Neutral Beam Injection on CHS
- Observation of Low Frequency MHD Mode Driven by Energetic Particles in Large Helical Device Plasmas with Strong Interchange Mode Activities
- ECW/EBW Heating and Current Drive Experiment Results and Prospects for CW Operation in QUEST
- Visualization of H− Dynamics in Extraction Region of Negative-Ion Source by Hα Imaging Spectroscopy
- Experimental Study of Nonlinear Processes in Edge Turbulence of Toroidal Plasmas
- Determination of the Major Impurity Radiators in the Reheat Mode Discharges in the Compact Helical System
- Electron Bernstein Wave Heating through Slow X-B Mode Conversion in CHS
- O-X-B Heating of Overdense Plasmas by 54.5 GHz Electron Cyclotron Waves in CHS
- Ion Heating Experiments Using Perpendicular Neutral Beam Injection in the Large Helical Device
- 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
- 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
- Energetic Ion Measurements Using a Directional Probe
- Characteristic Formation of Edge Transport Barrier in the Compact Helical System
- Bispectral Analysis of Harmonic Oscillations Measured using Beam Emission Spectroscopy and Magnetic Probes in CHS
- Measurement of Radial Structure of Energetic-Ion-Driven MHD Modes with a Fast Response Hα-Detector Array in the Large Helical Device
- Advanced Laser Diagnostics for Electron Density Measurements
- Calibrations of Fast Ion Flux Measurement Using a Hybrid Directional Probe
- Simultaneous Measurements of Proton Ratio and Beam Divergence of Positive-Ion-Based Neutral Beam in the Large Helical Device
- Analysis of Energy Spectra of Fast Ion in the Large Helical Device
- Bench Testing of New Polarimeter with Silicon Photoelastic Modulator for Short Wavelength FIR Laser
- Observation of Toroidal Flow on LHD
- Performance Improvement in Real-Time Mapping of Thomson Scattering Data to Flux Coordinates in LHD
- Plasma Diagnostics Required for a Heliotron-Type DEMO Reactor
- Neoclassical Transport Properties in High-Ion-Temperature Hydrogen Plasmas in the Large Helical Device (LHD)
- First Observation of High Density Edge Transport Barrier Formation during Reheat Mode of Helical Plasma in CHS
- A Simultaneous Spectroscopic Measurement of the Global and Edge Local Structures in the Ion Temperature and Plasma Rotation Profiles in the Compact Helical System
- Development of an Array System of Soft X-ray Detectors with Large Sensitive Area on the Large Helical Device
- Neutral Density Profile Determines the Vorticity of Ion Flow in a Charge Exchange-dominated Plasma.
- Tangential SX Imaging for Visualization of Fluctuations in Toroidal Plasmas
- Development of Short-Wavelength Far-Infrared Lasers and Optical Elements for Plasma Diagnostics
- Gene Expression Profiling of Lung Myofibroblasts Reveals the Anti-Fibrotic Effects of Cyclosporine
- Non-Inductive Current Drive by EC Waves in an Inboard Poloidal Magnetic Field Null Configuration on the Spherical Tokamak QUEST