scholarly journals KINETIC BALLOONING MODE ANALYSIS OF TOKAMAK PLASMAS WITH THE SECOND STABILITY REGIME INCLUDED

1984 ◽  
Vol 33 (11) ◽  
pp. 1546
Author(s):  
SHI BING-REN ◽  
SUI GUO-FANG
Keyword(s):  
Mode Analysis ◽  
Tokamak Plasmas ◽  
Ballooning Mode ◽  
Stability Regime

GTC Simulation of Ideal Ballooning Mode in Tokamak Plasmas

2013 ◽  
Vol 15 (6) ◽  
pp. 499-505 ◽  
Author(s):  
Zebin Li ◽  
Guoya Sun ◽  
Ihor Holod ◽  
Yong Xiao ◽  
Wenlu Zhang ◽  
...  
Keyword(s):  
Tokamak Plasmas ◽  
Ballooning Mode

Integral-equation analysis of the kinetic-ballooning modes in tokamaks

2002 ◽  
Vol 80 (12) ◽  
pp. 1517-1523 ◽  
Author(s):  
A Hirose ◽  
M Elia
Keyword(s):  
Integral Equation ◽  
Temperature Gradient ◽  
Ion Temperature ◽  
Ion Temperature Gradient ◽  
Ballooning Mode ◽  
Equation Analysis ◽  
Ideal Mhd ◽  
Stability Regime ◽  
The Ideal

The existence of kinetic-ballooning modes in the regime that is stable against the ideal MHD (magnetohydrodynamic) mode has been confirmed by nonlocal analysis based on integral-equation formalism. In contrast to the previous results based on differential-shooting codes, the kinetic-ballooning mode in the second stability regime does not require a finite ion-temperature gradient. PACS Nos.: 52.35Kt, 52.55Fa

Theoretical studies of low-frequency Alfvén modes in tokamak plasmas

2021 ◽  
Author(s):  
R R Ma ◽  
Liu Chen ◽  
Fulvio Zonca ◽  
Yueyan Li ◽  
Zhiyong Qiu
Keyword(s):  
Low Frequency ◽  
Acoustic Mode ◽  
Frequency Region ◽  
Physical Parameters ◽  
Linear Wave ◽  
Tokamak Plasmas ◽  
High Frequency Region ◽  
Energetic Ions ◽  
Ballooning Mode ◽  
Spectral Patterns

Abstract Linear wave properties of the low-frequency Alfvén modes (LFAMs) observed in the DIII-D tokamak experiments with reversed magnetic shear [Nucl. Fusion 61, 016029 (2021)] are theoretically studied and delineated based on the general fishbone-like dispersion relation. By adopting the representative experimental equilibrium parameters, it is found that, in the absence of energetic ions, the LFAM is a kinetic ballooning mode instability of reactive-type with a dominant Alfvénic polarization. More specifically, due to diamagnetic and trapped particle effects, the LFAM can be coupled with the beta-induced Alfvén-acoustic mode in the low-frequency region (frequency much less than the thermal-ion transit and/or bounce frequency); or with the beta-induced Alfvén eigenmode in the high frequency region (frequency higher than or comparable to the thermal-ion transit frequency); resulting in reactive-type instabilities. Moreover, the ‘Christmas light’ and ‘mountain peak’ spectral patterns of LFAMs as well as the dependence of instability drive on the electron temperature observed in the experiments can be theoretically interpreted by varying the relevant physical parameters. Conditions when dissipative-type instabilities may set in are also discussed.

Effects of ballooning instability on tokamak confinement

1988 ◽  
Vol 39 (1) ◽  
pp. 11-25 ◽  
Author(s):  
Guoyong Fu ◽  
J. W. Van Dam
Keyword(s):  
Thermal Conductivity ◽  
Energetic Particle ◽  
Transport Model ◽  
Scaling Law ◽  
Transport Mode ◽  
Ballooning Instability ◽  
Ballooning Mode ◽  
High Heating ◽  
Stability Regime ◽  
High Beta

Using the ballooning-mode transport model proposed by Connor, Taylor & Turner (1984), we derive the thermal conductivity induced by ideal ballooning instability and compare it to experimental observations from auxiliary-heated tokamaks. We show how this model can be improved by means of a finite-beta equilibrium and also apply it to obtain a confinement scaling law for high-beta, purely Ohmically heated tokamaks. Finally, we employ this transport mode to find that tokamaks with supplemental stabilization, for example due to gyroradius, energetic particle or shaping effects, can self-consistently access the second stability regime at rather high heating power.

Modification of tokamak edge instability character through control of ballooning mode second stability regime accessibility

2000 ◽  
Vol 40 (7) ◽  
pp. 1411-1418 ◽  
Author(s):  
J.R Ferron ◽  
L.L Lao ◽  
T.C Luce ◽  
R.L Miller ◽  
T.H Osborne ◽  
...  
Keyword(s):  
Ballooning Mode ◽  
Tokamak Edge ◽  
Stability Regime

Transition between resistive ballooning mode and toroidal drift wave mode at the edge of tokamak plasmas

2018 ◽  
Vol 25 (3) ◽  
pp. 032505 ◽  
Author(s):  
X. D. Peng ◽  
J. Q. Xu ◽  
H. B. Jiang ◽  
G. Wang
Keyword(s):  
Wave Mode ◽  
Tokamak Plasmas ◽  
Drift Wave ◽  
Ballooning Mode
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