Numerical Studies on Resistive Wall Instabilities in Cylindrical Plasma Confined by Surface Current

2011 ◽  
Vol 50-51 ◽  
pp. 785-789
Author(s):  
Shao Yan Cui ◽  
Peng Xie
Keyword(s):  
Plasma Flow ◽  
Initial Perturbation ◽  
Surface Current ◽  
Cylindrical Plasma ◽  
Resistive Wall Mode ◽  
Numerical Studies ◽  
Function Distribution ◽  
Resistive Wall ◽  
Dirac Function ◽  
The Stability

The stability of resistive wall mode is studied in cylindrical plasma confined by surface current, which is Dirac -function distribution. For Dirac -function distribution case, it is shown that the perturbations oscillate and even decline wherever the initial perturbation seed is placed. The whole system is stable and the plasma flow has little effect on it.

Resistive wall mode in cylindrical plasmas in the presence of surface currents

2012 ◽  
Vol 78 (5) ◽  
pp. 501-506 ◽  
Author(s):  
SHAOYAN CUI ◽  
GAIMIN LU ◽  
YUE LIU
Keyword(s):  
Plasma Flow ◽  
Initial Perturbation ◽  
Surface Current ◽  
Rational Surface ◽  
Step Function ◽  
Current Layer ◽  
Surface Currents ◽  
Surface Current Distribution ◽  
Resistive Wall Mode ◽  
Resistive Wall

AbstractStability of the resistive wall mode in cylindrical plasmas confined by surface currents is investigated for the δ-function and step-function equilibrium surface-current profiles. For the former, it is shown that the perturbations oscillate and even decay for all locations of the initial perturbation. The entire system is stable and the plasma flow has little effect. For the step-function surface-current distribution, it is found that the thicker the surface current layer, the more stable is the system even if the largest initial perturbation is located on the rational surface, but the plasma flow also has little effect on the system.

scholarly journals Toroidal modeling of interaction between resistive wall mode and plasma flow

2013 ◽  
Vol 20 (2) ◽  
pp. 022505 ◽  
Author(s):  
Yueqiang Liu ◽  
Youwen Sun
Keyword(s):  
Plasma Flow ◽  
Resistive Wall Mode ◽  
Resistive Wall

Synergistic effects of turbulence induced viscosity and plasma flow on resistive wall mode instability

2020 ◽  
Vol 62 (7) ◽  
pp. 075007
Author(s):  
G Z Hao ◽  
Y Q Liu ◽  
A K Wang ◽  
H T Chen ◽  
Y T Miao ◽  
...  
Keyword(s):  
Plasma Flow ◽  
Synergistic Effects ◽  
Mode Instability ◽  
Resistive Wall Mode ◽  
Resistive Wall

scholarly journals Combined effects of trapped energetic ions and resistive layer damping on the stability of the resistive wall mode

2016 ◽  
Vol 23 (1) ◽  
pp. 012506 ◽  
Author(s):  
Yuling He ◽  
Yueqiang Liu ◽  
Yue Liu ◽  
Chao Liu ◽  
Guoliang Xia ◽  
...  
Keyword(s):  
Combined Effects ◽  
Resistive Layer ◽  
Energetic Ions ◽  
Resistive Wall Mode ◽  
Resistive Wall ◽  
The Stability

Effects of parallel sound wave damping and drift kinetic damping on the resistive wall mode stability with various plasma rotation profiles

2015 ◽  
Vol 81 (5) ◽  
Author(s):  
Chao Liu ◽  
Yue Liu
Keyword(s):  
Shear Flow ◽  
Rational Surface ◽  
High Plasma ◽  
Flow Speed ◽  
Viscous Force ◽  
Flow Profile ◽  
Plasma Rotation ◽  
Resistive Wall Mode ◽  
Resistive Wall ◽  
The Stability

The effect of a parallel viscous force induced damping and the magnetic precessional drift resonance induced damping on the stability of the resistive wall mode (RWM) is numerically investigated for one of the advanced steady-state scenarios in international thermonuclear experimental reactor (ITER). The key element of the investigation is to study how different plasma rotation profiles affect the stability prediction. The single-fluid, toroidal magnetohydrodynamic (MHD) code MARS-F (Liu et al., Phys. Plasmas, vol. 7, 2000, p. 3681) and the MHD–kinetic hybrid code MARS-K (Liu et al., Phys. Plasmas, vol. 15, 2008, 112503) are used for this purpose. Three extreme rotation profiles are considered: (a) a uniform profile with no shear, (b) a profile with negative flow shear at the $q=2$ rational surface ($q$ is the equilibrium safety factor), and (c) a profile with positive shear at $q=2$. The parallel viscous force is found to be effective for the mode stabilization at high plasma flow speed (about a few percent of the Alfven speed) for the no shear flow profile and the negative shear flow profile, but the stable domain does not appear with the positive shear flow profile. The predicted eigenmode structure is different with different rotation profiles. With a self-consistent inclusion of the magnetic precession drift resonance of thermal particles in MARS-K computations, a lower critical flow speed, i.e. the minimum speed needed for full suppression of the mode, is obtained. Likewise the eigenmode structure is also modified by different rotation profiles in the kinetic results.

scholarly journals Expanded capabilities of the CarMa code in modeling resistive wall mode dynamics with 3-D conductors

2020 ◽  
Vol 62 (4) ◽  
pp. 045016
Author(s):  
M Bonotto ◽  
Y Q Liu ◽  
F Villone ◽  
L Pigatto ◽  
P Bettini
Keyword(s):  
Resistive Wall Mode ◽  
Resistive Wall
Sign in / Sign up

Export Citation Format

Share Document