Summary of the magnetic confinement theory and modelling activity presented at the 24th IAEA Fusion Energy Conference

Hahm, Tae Soo

doi:10.1088/0029-5515/53/10/104026

Cited by 6 publications

(4 citation statements)

References 133 publications

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“…51 Comparison of observations of filaments in EAST with BOUTþþ simulations is described in Ref. 70. The recent development of ECE imaging diagnostics [71][72][73] gives very detailed 2D data of the ELM fluctuations.…”

Section: E Validationmentioning

confidence: 99%

Modelling of edge localised modes and edge localised mode control

et al. 2015

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Edge Localised Modes (ELMs) in ITER Q ¼ 10 H-mode plasmas are likely to lead to large transient heat loads to the divertor. To avoid an ELM induced reduction of the divertor lifetime, the large ELM energy losses need to be controlled. In ITER, ELM control is foreseen using magnetic field perturbations created by in-vessel coils and the injection of small D2 pellets. ITER plasmas are characterised by low collisionality at a high density (high fraction of the Greenwald density limit). These parameters cannot simultaneously be achieved in current experiments. Therefore, the extrapolation of the ELM properties and the requirements for ELM control in ITER relies on the development of validated physics models and numerical simulations. In this paper, we describe the modelling of ELMs and ELM control methods in ITER. The aim of this paper is not a complete review on the subject of ELM and ELM control modelling but rather to describe the current status and discuss open issues. [

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Section: E Validationmentioning

confidence: 99%

Modelling of edge localised modes and edge localised mode control

et al. 2015

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“…Although there is a lack of direct experimental evidence of turbulence-driven plasma current in tokamaks, numerical simulations do observe significant dynamo action due to MHD turbulence in reversed field pinches [9] and spherical dynamo experiments [10], and electron current generation by electrostatic ion-beam-driven instability [11]. The aforementioned critical research interests provide a strong motivation to investigate turbulence effects on plasma cur rent self-generation in tokamak experiments [8,[12][13][14][15][16][17][18][19]. More generally, turbulence-driven plasma current generation is of great interest in broad fields of space plasma and astrophysical phenomena in the context of turbulencedriven dynamo and magnetization [20,21].…”

Section: Introductionmentioning

confidence: 99%

Self-driven current generation in turbulent fusion plasmas

et al. 2019

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Global gyrokinetic simulations with self-consistent coupling of neoclassical and turbulent dynamics show that turbulence can significantly affect plasma self-driven mean current generation in tokamaks. The current amplitude, profile and associated phase space structures can all be modified. Turbulence can significantly reduce the current generation in the collisionless regime, generate current profile corrugation near the rational magnetic surface and nonlocally drive current in the linearly stable region—all these are expected to have a radical impact on broad tokamak physics. Both electron parallel acceleration and residual stress from turbulence play crucial roles in turbulence-induced current generation.

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“…На Т-10 был показан глобальный характер ГАМ [10], но на токамаке Туман-3 измерения, использующие аналогичные методики, показали периферийный характер ГАМ [11]. Актуальность и уровень всеобщего интереса к проблеме ГАМ характеризует тот факт, что в недавнем обзоре [12] зональные течения поставлены на первое место. В связи с этим корреляционные свойства ГАМ являются важной темой исследования переноса и турбулентности.…”

Section: Introductionunclassified

Long-Distance Correlations of Geodesic Acoustic Modes in T-10

Melnikov¹,

Eliseev²,

Лысенко³

et al. 2015

PAST-TF

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Геодезические акустические моды (ГАМ) рассматриваются в качестве механизма самостабилизации турбулентности. На токамаке Т-10 ГАМ на электростатическом потенциале и флуктуации плотности одновременно исследовались с помощью зондирования пучком тяжёлых ионов (ЗПТИ) и корреляционной рефлектометрии (КР). Изучались режимы с омическим и электронноциклотронным (ЭЦ) нагревом. ГАМ более выражены во время ЭЦ-нагрева, при этом их типичные частоты лежат в узкой полосе 22-27 кГц для основного пика и 25-30 кГц для более высокочастотного сателлита. Локальные значения электрического потенциала и флуктуаций демонстрируют заметную когерентность и постоянный фазовый сдвиг в диапазоне частот ГАМ. Существование дальних пространственных (1/4 тора) корреляций потенциала и плотности для ГАМ означает, что ГАМ является глобальной модой, что впервые показано на токамаке.

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Summary of the magnetic confinement theory and modelling activity presented at the 24th IAEA Fusion Energy Conference

Abstract: This paper presents a summary of the papers presented at the 24th IAEA Fusion Energy Conference (San Diego, CA, October 2012) on magnetic confinement theory and modelling.

Cited by 6 publications

References 133 publications

Modelling of edge localised modes and edge localised mode control

Modelling of edge localised modes and edge localised mode control

Self-driven current generation in turbulent fusion plasmas

Long-Distance Correlations of Geodesic Acoustic Modes in T-10

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