4.5 Article

Analysis of the ECH effect on EPM/AE stability in Heliotron J plasma using a Landau closure model

相关参考文献

注意:仅列出部分参考文献,下载原文获取全部文献信息。
Article Physics, Fluids & Plasmas

Recent results from deuterium experiments on the large helical device and their contribution to fusion reactor development

Masaki Osakabe et al.

Summary: In recent deuterium experiments on the large helical device (LHD), we have explored techniques to increase the electron and ion temperatures in plasmas. We observed important phenomena such as the isotope effect in the formation of internal transport barrier and the simultaneous formation of edge transport barrier and divertor detachment. Additionally, the contributions of negative-ion based neutral beam injector research and tritium mass balance study to fusion reactor development are discussed.

NUCLEAR FUSION (2022)

Article Physics, Fluids & Plasmas

Theoretical study of the Alfven eigenmode stability in CFETR steady state discharges

J. Varela et al.

Summary: The aim of this study is to analyze the stability of Alfven eigenmodes in the CFETR plasma for steady state operations. The study shows that the location of the internal transport barrier and the inclusion of multiple energetic particle populations and finite Larmor radius damping effects can affect the stability of the plasma.

NUCLEAR FUSION (2022)

Article Physics, Fluids & Plasmas

Study of the Alfven eigenmodes stability in CFQS plasma using a Landau closure model

J. Varela et al.

Summary: This study aims to analyze the stability of Alfven eigenmodes in the Chinese First Quasi-axisymmetric Stellarator. Simulation results show that different types of AEs become unstable due to the slowing down process of EP, with the energy level of EP affecting the stability. Increase in thermal plasma density improves AE stability in the plasma.

NUCLEAR FUSION (2021)

Article Physics, Fluids & Plasmas

Effects of negative triangularity shaping on energetic particle driven Alfven eigenmodes in DIII-D *

Y. Ghai et al.

Summary: The study compares the effects of positive and negative triangularity shapes on tokamak performance and AE activity, finding that unstable AEs in the negative triangularity case have lower growth rates, which may help reduce fast ion losses.

NUCLEAR FUSION (2021)

Article Physics, Fluids & Plasmas

Stability analysis of TJ-II stellarator NBI driven Alfven eigenmodes in ECRH and ECCD experiments

A. Cappa et al.

Summary: This paper analyzes the impact of electron cyclotron resonance heating and electron cyclotron current drive on Alfvenic instabilities in the TJ-II stellarator caused by neutral beam injection. An MHD stability analysis is carried out to compare with experimental data, showing that the predicted modes coincide with the observed fluctuations. Despite uncertainties, the code predictions agree reasonably well with experimental results.

NUCLEAR FUSION (2021)

Article Physics, Fluids & Plasmas

Evidence for Alfven eigenmodes driven by alpha particles in D-3He fusion experiments on JET

V. G. Kiptily et al.

Summary: The study reveals that Alfven eigenmodes (AEs) driven by energetic alpha particles can deteriorate plasma performance in ITER and future fusion reactors, emphasizing the need for improved understanding of the interactions between different fast ion phenomena in burning plasmas.

NUCLEAR FUSION (2021)

Article Physics, Fluids & Plasmas

Theoretical analysis of the saturation phase of the 1/1 energetic-ion-driven resistive interchange mode

J. Varela et al.

Summary: The study aimed to analyze the saturation regime of the energetic ion-driven resistive interchange mode in LHD plasma. Nonlinear simulations were conducted to reproduce the experimental observations of 1/1 EIC saturation phases, showing enhancement of the resistive interchange modes as EP beta increases and triggering burst events. The study also revealed inward propagation and stabilization phases of the 1/1 EIC due to the nonlinear destabilization of energetic particle modes.

NUCLEAR FUSION (2021)

Article Physics, Fluids & Plasmas

Nonlinear dynamics and transport driven by energetic particle instabilities using a gyro-Landau closure model *

D. A. Spong et al.

Summary: Using a gyro-Landau moments model, simulations of energetic particle destabilized Alfven eigenmode instabilities in a DIII-D experimental case with a pulsed neutral beam show consistent results with experimental observations. The predicted intermittent transport properties driven by instability are associated with zonal flow growth and decay cycles.

NUCLEAR FUSION (2021)

Article Physics, Fluids & Plasmas

Numerical investigation into the peripheral energetic-particle-driven MHD modes in Heliotron J with free boundary hybrid simulation

P. Adulsiriswad et al.

Summary: The study investigates the interaction between energetic particles and EP-driven MHD instabilities in Heliotron J using the MEGA simulation code with free boundary conditions. It is found that the free boundary conditions affect the spatial profile of modes, while under fixed boundary conditions, the linear growth rate of EP-driven MHD modes with low mode numbers is underestimated. The strongest interactions between EP and experimentally-observed modes occur in the high-velocity region.

NUCLEAR FUSION (2021)

Article Physics, Fluids & Plasmas

Experimental observation of the geodesic acoustic frequency limit for the NBI-driven Alfven eigenmodes in TJ-II

L. G. Eliseev et al.

Summary: This study focuses on Alfven eigenmodes (AEs) in the TJ-II heliac with hydrogen plasmas heated by a hydrogen co-field neutral beam injector. The observations show significant variations in AE frequency under changing plasma current, with a spatial location and internal amplitudes of the modes determined by an advanced heavy-ion beam probe diagnostic. Linear MHD modeling using STELLGAP and FAR3D codes replicates the observed frequency evolution, with radial profile peaks near the outer edge.

PHYSICS OF PLASMAS (2021)

Article Physics, Fluids & Plasmas

Effect of ECH/ECCD on energetic-particle-driven MHD modes in helical plasmas

S. Yamamoto et al.

NUCLEAR FUSION (2020)

Article Physics, Fluids & Plasmas

Modeling of the ECCD injection effect on the Heliotron J and LHD plasma stability

J. Varela et al.

NUCLEAR FUSION (2020)

Article Physics, Fluids & Plasmas

Verification and validation of integrated simulation of energetic particles in fusion plasmas

S. Taimourzadeh et al.

NUCLEAR FUSION (2019)

Article Physics, Fluids & Plasmas

Analysis of Alfven eigenmode destabilization in ITER using a Landau closure model

J. Varela et al.

NUCLEAR FUSION (2019)

Article Physics, Fluids & Plasmas

Subdominant modes and optimization trends of DIII-D reverse magnetic shear configurations

J. Varela et al.

NUCLEAR FUSION (2019)

Article Physics, Fluids & Plasmas

The effects of electron cyclotron heating and current drive on toroidal Alfven eigenmodes in tokamak plasmas

S. E. Sharapov et al.

PLASMA PHYSICS AND CONTROLLED FUSION (2018)

Article Physics, Fluids & Plasmas

Dynamic neutral beam current and voltage control to improve beam efficacy in tokamaks

D. C. Pace et al.

PHYSICS OF PLASMAS (2018)

Article Physics, Fluids & Plasmas

Suppression of fast-ion-driven MHD instabilities by ECH/ECCD on Heliotron J

S. Yamamoto et al.

NUCLEAR FUSION (2017)

Article Physics, Multidisciplinary

Suppression of Alfven Modes on the National Spherical Torus Experiment Upgrade with Outboard Beam Injection

E. D. Fredrickson et al.

PHYSICAL REVIEW LETTERS (2017)

Article Physics, Fluids & Plasmas

Suppression of energetic particle driven instabilities with HHFW heating

E. D. Fredrickson et al.

NUCLEAR FUSION (2015)

Article Physics, Fluids & Plasmas

Hard magnetohydrodynamic limit in 1/3 sawtooth like activity in LHD

J. Varela et al.

PHYSICS OF PLASMAS (2014)

Article Physics, Fluids & Plasmas

The effect of the fast-ion profile on Alfven eigenmode stability

W. W. Heidbrink et al.

NUCLEAR FUSION (2013)

Article Physics, Fluids & Plasmas

Stabilization of energetic-ion-driven MHD modes by ECCD in Heliotron J

K. Nagasaki et al.

NUCLEAR FUSION (2013)

Article Physics, Fluids & Plasmas

Internal disruptions and sawtooth like activity in Large Helical Device

J. Varela et al.

PHYSICS OF PLASMAS (2012)

Article Physics, Fluids & Plasmas

Off-axis neutral beam current drive for advanced scenario development in DIII-D

M. Murakami et al.

NUCLEAR FUSION (2009)

Article Physics, Fluids & Plasmas

Control of non-inductive current in heliotron J

G. Motojima et al.

NUCLEAR FUSION (2007)

Article Nuclear Science & Technology

Configuration control for the confinement improvement in Heliotron J

T. Mizuuchi et al.

FUSION SCIENCE AND TECHNOLOGY (2006)

Article Physics, Fluids & Plasmas

Heating and current drive by electron cyclotron waves

R Prater

PHYSICS OF PLASMAS (2004)

Article Physics, Fluids & Plasmas

Shear Alfven continua in stellarators

DA Spong et al.

PHYSICS OF PLASMAS (2003)

Article Physics, Fluids & Plasmas

Recent progress of Alfven eigenmode experiments using N-NB in JT-60U tokamak

K Shinohara et al.

NUCLEAR FUSION (2002)

Article Physics, Fluids & Plasmas

First plasmas in Heliotron J

T Obiki et al.

NUCLEAR FUSION (2001)

Article Physics, Fluids & Plasmas

RF current drive by electron cyclotron waves in the presence of magnetic islands

PRD Rosa et al.

PLASMA PHYSICS AND CONTROLLED FUSION (2000)

Article Physics, Fluids & Plasmas

Study of a helical axis heliotron

M Wakatani et al.

NUCLEAR FUSION (2000)

Article Physics, Fluids & Plasmas

Heating and non-inductive current drive by negative ion based NBI in JT-60U

T Oikawa et al.

NUCLEAR FUSION (2000)