scholarly journals Pedestal electron collisionality and toroidal rotation during ELM-crash suppression phase under n = 1 RMP in KSTAR

2020 ◽  
Vol 27 (11) ◽  
pp. 112501
Author(s):  
Minwoo Kim ◽  
J. Lee ◽  
W. H. Ko ◽  
S.-H. Hahn ◽  
Y. In ◽  
...  
Keyword(s):  
Toroidal Rotation ◽  
Suppression Phase

Impurity toroidal rotation profile measurement using upgraded high-resolution visible spectroscopic diagnostic on ADITYA-U tokamak

2021 ◽  
Vol 92 (6) ◽  
pp. 063517
Author(s):  
G. Shukla ◽  
M. B. Chowdhuri ◽  
K. Shah ◽  
R. Manchanda ◽  
N. Ramaiya ◽  
...  
Keyword(s):  
High Resolution ◽  
Profile Measurement ◽  
Toroidal Rotation

Influence of toroidal rotation on the tearing mode in tokamak plasmas

2020 ◽  
Vol 22 (6) ◽  
pp. 065102
Author(s):  
Zhenghao REN ◽  
Jinyuan LIU ◽  
Feng WANG ◽  
Huishan CAI ◽  
Zhengxiong WANG ◽  
...  
Keyword(s):  
Tokamak Plasmas ◽  
Tearing Mode ◽  
Toroidal Rotation

Understanding core heavy impurity transport in a hybrid discharge on EAST

2021 ◽  
Author(s):  
Shengyu Shi ◽  
Jiale Chen ◽  
Clarisse Bourdelle ◽  
Xiang Jian ◽  
Tomas Odstrcil ◽  
...  
Keyword(s):  
Density Profile ◽  
Central Region ◽  
Turbulent Transport ◽  
Accumulation Process ◽  
Plasma Parameters ◽  
Toroidal Rotation ◽  
The Core ◽  
Impurity Transport ◽  
Accumulation Phase ◽  
Bulk Plasma

Abstract The behavior of heavy/high-Z impurity tungsten (W) in the core of hybrid (high normalized beta β_N plasmas) scenario on EAST with ITER-like divertor (ILD) is analyzed. W accumulation is often observed and seriously degrades the plasma performance (Xiang Gao et al 2017 Nucl. Fusion 57 056021). The dynamics of the W accumulation process of a hybrid discharge are examined considering the concurrent evolution of the background plasma parameters. It turns out that the toroidal rotation and density peaking of the bulk plasma are usually large in the central region, which is particularly prone to the W accumulation. A time slice during the W accumulation phase is modeled, accounting for both neoclassical and turbulent transport components of W, through NEO with poloidal asymmetry effects induced by toroidal rotation, and TGLF, respectively. This modeling reproduces the experimental observations of W accumulation and identifies the neoclassical inward convection/pinch velocity of W due to the large density peaking of the bulk plasma and toroidal rotation in the central region as one of the main reasons for the W accumulation. In addition, the NEO+TGLF+STRAHL modeling can not only predict the core W density profile but also closely reconstruct the radiated information mainly produced by W in the experiment.

Real-time measurement of toroidal rotation (abstract)

2001 ◽  
Vol 72 (1) ◽  
pp. 966-966
Author(s):  
S. F. Paul ◽  
C. Cates ◽  
M. Mauel ◽  
D. Maurer ◽  
G. Navratil ◽  
...  
Keyword(s):  
Real Time ◽  
Time Measurement ◽  
Toroidal Rotation ◽  
Real Time Measurement

Measurement of central toroidal rotation in ohmic Tore Supra plasmas

2000 ◽  
Vol 40 (3) ◽  
pp. 319-324 ◽  
Author(s):  
A Romannikov ◽  
C Bourdelle ◽  
J Bucalossi ◽  
T Hutter ◽  
P Platz ◽  
...  
Keyword(s):  
Toroidal Rotation
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