Eigenmode formations ofm= 1 fast Alfvén waves in the ion-cyclotron frequency range in the GAMMA 10 central cell

2006 ◽  
Vol 48 (8) ◽  
pp. 1155-1163 ◽  
Author(s):  
Y Yamaguchi ◽  
M Ichimura ◽  
H Higaki ◽  
S Kakimoto ◽  
K Nakagome ◽  
...  
Keyword(s):  
Cyclotron Frequency ◽  
Alfven Waves ◽  
Central Cell ◽  
Alfvén Waves ◽  
Frequency Range ◽  
Ion Cyclotron

scholarly journals Active diagnostic of the eigenmode formation in the ion-cyclotron frequency range in the GAMMA10 central cell

2006 ◽  
Vol 77 (10) ◽  
pp. 10E904
Author(s):  
Y. Yamaguchi ◽  
M. Ichimura ◽  
H. Higaki ◽  
S. Kakimoto ◽  
K. Nakagome ◽  
...  
Keyword(s):  
Cyclotron Frequency ◽  
Central Cell ◽  
Frequency Range ◽  
Ion Cyclotron

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.

The excitation of obliquely propagating fast Alfvén waves at fusion ion cyclotron harmonics

1994 ◽  
Vol 1 (6) ◽  
pp. 1918-1928 ◽  
Author(s):  
R. O. Dendy ◽  
C. N. Lashmore‐Davies ◽  
K. G. McClements ◽  
G. A. Cottrell
Keyword(s):  
Alfven Waves ◽  
Alfvén Waves ◽  
Ion Cyclotron ◽  
Cyclotron Harmonics
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