scholarly journals Sub-microsecond temporal evolution of edge density during edge localized modes in KSTAR tokamak plasmas inferred from ion cyclotron emission

2017 ◽  
Vol 57 (12) ◽  
pp. 124004 ◽  
Author(s):  
B. Chapman ◽  
R.O. Dendy ◽  
K.G. McClements ◽  
S.C. Chapman ◽  
G.S. Yun ◽  
...  
Keyword(s):  
Temporal Evolution ◽  
Edge Density ◽  
Tokamak Plasmas ◽  
Localized Modes ◽  
Ion Cyclotron ◽  
Cyclotron Emission ◽  
Edge Localized Modes

scholarly journals Novel internal measurements of ion cyclotron frequency range fast-ion driven modes

2021 ◽  
Author(s):  
Neal A Crocker ◽  
Shawn X Tang ◽  
Kathreen E Thome ◽  
Jeff Lestz ◽  
Elena Belova ◽  
...  
Keyword(s):  
Cyclotron Frequency ◽  
Harmonic Wave ◽  
Wave Number ◽  
Frequency Range ◽  
High Wave Number ◽  
Minor Radius ◽  
Ion Cyclotron ◽  
Cyclotron Emission ◽  
Edge Localized Modes ◽  
Fast Ion

Abstract Novel internal measurements and analysis of ion cyclotron frequency range fast-ion driven modes in DIII-D are presented. Observations, including internal density fluctuation (ñ) measurements obtained via Doppler Backscattering, are presented for modes at low harmonics of the ion cyclotron frequency localized in the edge. The measurements indicate that these waves, identified as coherent Ion Cyclotron Emission (ICE), have high wave number, _⊥ρ_fast ≳ 1, consistent with the cyclotron harmonic wave branch of the magnetoacoustic cyclotron instability (MCI), or electrostatic instability mechanisms. Measurements show extended spatial structure (at least ~ 1/6 the minor radius). These edge ICE modes undergo amplitude modulation correlated with edge localized modes (ELM) that is qualitatively consistent with expectations for ELM-induced fast-ion transport.

Sustained edge-localized-modes suppression and radiative divertor with an impurity-driven instability in tokamak plasmas

2021 ◽  
Vol 61 (11) ◽  
pp. 116032
Author(s):  
Y. Ye ◽  
G.S. Xu ◽  
Y.Q. Tao ◽  
R. Chen ◽  
L. Wang ◽  
...  
Keyword(s):  
Tokamak Plasmas ◽  
Localized Modes ◽  
Edge Localized Modes

Current losses induced by edge localized modes in JET tokamak plasmas

2005 ◽  
Vol 47 (6) ◽  
pp. 733-744 ◽  
Author(s):  
D Testa ◽  
M Bigi ◽  
JET-EFDA contributors
Keyword(s):  
Tokamak Plasmas ◽  
Localized Modes ◽  
Edge Localized Modes

scholarly journals Fast particle-driven ion cyclotron emission (ICE) in tokamak plasmas and the case for an ICE diagnostic in ITER

2015 ◽  
Vol 55 (4) ◽  
pp. 043013 ◽  
Author(s):  
K.G. McClements ◽  
R. D'Inca ◽  
R.O. Dendy ◽  
L. Carbajal ◽  
S.C. Chapman ◽  
...  
Keyword(s):  
Fast Particle ◽  
Tokamak Plasmas ◽  
Ion Cyclotron ◽  
Cyclotron Emission
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