Slow-wave propagation and sheath interaction in the ion-cyclotron frequency range

2009 ◽  
Vol 52 (1) ◽  
pp. 015003 ◽  
Author(s):  
J R Myra ◽  
D A D'Ippolito
Keyword(s):  
Wave Propagation ◽  
Slow Wave ◽  
Cyclotron Frequency ◽  
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.

scholarly journals Parametric decay in the edge plasma of ASDEX during fast wave heating in the ion cyclotron frequency range

1988 ◽  
Vol 28 (9) ◽  
pp. 1603-1609 ◽  
Author(s):  
R. Van Nieuwenhove ◽  
G. Van Oost ◽  
J.-M. Noterdaeme ◽  
M. Brambilla ◽  
J. Gernhardt ◽  
...  
Keyword(s):  
Cyclotron Frequency ◽  
Edge Plasma ◽  
Fast Wave ◽  
Frequency Range ◽  
Parametric Decay ◽  
Wave Heating ◽  
Ion Cyclotron

scholarly journals Solar Wind Electric Fields in the Ion Cyclotron Frequency Range

2006 ◽  
Vol 645 (1) ◽  
pp. 704-710 ◽  
Author(s):  
P. J. Kellogg ◽  
S. D. Bale ◽  
F. S. Mozer ◽  
T. S. Horbury ◽  
H. Reme
Keyword(s):  
Solar Wind ◽  
Electric Fields ◽  
Cyclotron Frequency ◽  
Frequency Range ◽  
Ion Cyclotron

Ion flow driven by waves in the ion cyclotron frequency range

2000 ◽  
Vol 7 (2) ◽  
pp. 564-570 ◽  
Author(s):  
Harold Weitzner ◽  
Lee A. Berry ◽  
E. Fred Jaeger ◽  
Donald B. Batchelor
Keyword(s):  
Cyclotron Frequency ◽  
Frequency Range ◽  
Ion Flow ◽  
Ion Cyclotron

Magnetohydrodynamic wave propagation from a localized source including hall effect

1968 ◽  
Vol 263 (1137) ◽  
pp. 119-147 ◽  
Keyword(s):  
Wave Propagation ◽  
Wave Amplitude ◽  
Cyclotron Frequency ◽  
Asymptotic Expression ◽  
Wave Frequency ◽  
Laboratory Plasma ◽  
Magnetohydrodynamic Wave ◽  
Localized Source ◽  
Ion Cyclotron ◽  
Finite Electrical Conductivity

Lighthill’s theorem on magnetohydrodynamic wave propagation from a localized source gives an asymptotic expression for the wave amplitude at large distance from the source and this theorem is applied to a laboratory plasma. Attention is focused mainly on conditions where the Alfven speed is large compared with the sound speed and where the wave frequency is of the same order as the ion cyclotron frequency. These conditions are also typical of certain natural plasmas. The manner in which the wave amplitude depends on the direction of propagation and on the ratio of the wave frequency to the ion cyclotron frequency is examined and illustrated by graphs which also cover a range of source sizes. An extension is made into a two-fluid theory such that electron inertia and electron source terms can be included and the effect of finite electrical conductivity is considered.

Edge localized magnetosonic eigenmodes in the ion cyclotron frequency range

2003 ◽  
Vol 10 (11) ◽  
pp. 4371-4377 ◽  
Author(s):  
T. Hellsten ◽  
M. Laxåback
Keyword(s):  
Cyclotron Frequency ◽  
Frequency Range ◽  
Ion Cyclotron
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