Radio frequency measurements of energetic-particle-driven emission using the ion cyclotron emission diagnostic on the DIII-D tokamak

2018 ◽  
Vol 89 (10) ◽  
pp. 10I102 ◽  
Author(s):  
K. E. Thome ◽  
D. C. Pace ◽  
R. I. Pinsker ◽  
O. Meneghini ◽  
C. A. del Castillo ◽  
...  
Keyword(s):  
Radio Frequency ◽  
Energetic Particle ◽  
Frequency Measurements ◽  
Ion Cyclotron ◽  
Cyclotron Emission

Upgrades to the ion cyclotron emission diagnostic on the DIII-D tokamak

2021 ◽  
Vol 92 (3) ◽  
pp. 033543
Author(s):  
G. H. DeGrandchamp ◽  
K. E. Thome ◽  
W. W. Heidbrink ◽  
I. Holmes ◽  
R. I. Pinsker
Keyword(s):  
Ion Cyclotron ◽  
Cyclotron Emission

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.

Precision radio-frequency measurements of the high-LRydberg states of lithium

1995 ◽  
Vol 51 (4) ◽  
pp. 2919-2925 ◽  
Author(s):  
N. E. Rothery ◽  
C. H. Storry ◽  
E. A. Hessels
Keyword(s):  
Radio Frequency ◽  
Frequency Measurements

Improved Edge Confinement due to Ion Cyclotron Radio Frequency boronization in the HT-7 Tokamak

2003 ◽  
Vol 20 (6) ◽  
pp. 881-884 ◽  
Author(s):  
Xu Guo-Sheng ◽  
Wan Bao-Nian ◽  
Song-Mei ◽  
Ling Bi-Li
Keyword(s):  
Radio Frequency ◽  
Ion Cyclotron
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