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

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.

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

scholarly journals Dual 2-Hydroxypropyl-β-Cyclodextrin and 5,10,15,20-Tetrakis (4-Hydroxyphenyl) Porphyrin System as a Novel Chiral-Achiral Selector Complex for Enantioseparation of Aminoalkanol Derivatives with Anticancer Activity in Capillary Electrophoresis

Molecules ◽  
2021 ◽  
Vol 26 (4) ◽  
pp. 993
Author(s):  
Błażej Grodner ◽  
Mariola Napiórkowska
Keyword(s):  
Capillary Electrophoresis ◽  
Anticancer Agents ◽  
Chiral Discrimination ◽  
Combined Effects ◽  
Pilot Studies ◽  
Repeatability And Reproducibility ◽  
The Stability ◽  
Short Time ◽  
High Separation

In this study, a complex consisting of 2-hydroxypropyl-β-cyclodextrin and 5,10,15,20-tetrakis (4-hydroxyphenyl) porphyrin, (named dual chiral-achiral selector complex) was used for the determination of two novel potential anticancer agents of (I) and (II) aminoalkanol derivatives. This work aimed at developing an effective method that can be utilized for the determination of I (S), I (R), and II (S) and II (R) enantiomers of (I) and (II) compounds through the use of a dual chiral-achiral selector complex consisting of hydroxypropyl-β-cyclodextrin and 5,10,15,20-tetrakis (4-hydroxyphenyl) porphyrin system by applying capillary electrophoresis. This combination proved to be beneficial in achieving high separation selectivity due to the combined effects of different modes of chiral discrimination. The enantiomers of (I) and (II) compounds were separated within a very short time of 3.6–7.2 min, in pH 2.5 phosphate buffer containing 2-hydroxypropyl-β-cyclodextrin and 5,10,15,20-tetrakis (4-hydroxyphenyl) porphyrin system at a concentration of 5 and 10 mM, respectively, at 25 °C and +10 kV. The detection wavelength of the detector was set at 200 nm. The LOD for I (S), I (R), II (S), and II (R) was 65.2, 65.6, 65.1, and 65.7 ng/mL, respectively. LOQ for I (S), I (R), II (S), and II (R) was 216.5, 217.8, 217.1, and 218.1 ng/mL, respectively. Recovery was 94.9–99.9%. The repeatability and reproducibility of the method based on the values of the migration time, and the area under the peak was 0.3–2.9% RSD. The stability of the method was determined at 0.1–4.9% RSD. The developed method was used in the pilot studies for determining the enantiomers I (S), I (R), II (S), and II (R) in the blood serum.

Active Stabilization of the Resistive-Wall Mode in High-Beta, Low-Rotation Plasmas

2006 ◽  
Vol 97 (4) ◽  
Author(s):  
S. A. Sabbagh ◽  
R. E. Bell ◽  
J. E. Menard ◽  
D. A. Gates ◽  
A. C. Sontag ◽  
...  
Keyword(s):  
Resistive Wall Mode ◽  
Active Stabilization ◽  
Resistive Wall ◽  
High Beta
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