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

N. A. Crocker; S. X. Tang; K. E. Thome; J. B. Lestz; E. V. Belova; A. Zalzali; R. O. Dendy; W. A. Peebles; K. K. Barada; R. Hong; T. L. Rhodes; G. Wang; L. Zeng; T. A. Carter; G. H. Degrandchamp; W. W. Heidbrink; R. I. Pinsker

doi:10.1088/1741-4326/ac3d6a

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

N. A. Crocker, S. X. Tang, K. E. Thome, J. B. Lestz, E. V. Belova, A. Zalzali, R. O. Dendy, W. A. Peebles, K. K. Barada, R. Hong, T. L. Rhodes, G. Wang, L. Zeng, T. A. Carter, G. H. Degrandchamp, W. W. Heidbrink, R. I. Pinsker

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14 Scopus citations

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 ( ) 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, k ⊥ ρ fast ⪆ 1, consistent with the cyclotron harmonic wave branch of the magnetoacoustic cyclotron instability, 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.

Original language	English
Article number	026023
Journal	Nuclear Fusion
Volume	62
Issue number	2
DOIs	https://doi.org/10.1088/1741-4326/ac3d6a
State	Published - Feb 2022
Externally published	Yes

Keywords

Doppler backscattering
energetic particles
ion cyclotron emission

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This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1088/1741-4326/ac3d6a

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Crocker, N. A., Tang, S. X., Thome, K. E., Lestz, J. B., Belova, E. V., Zalzali, A., Dendy, R. O., Peebles, W. A., Barada, K. K., Hong, R., Rhodes, T. L., Wang, G., Zeng, L., Carter, T. A., Degrandchamp, G. H., Heidbrink, W. W., & Pinsker, R. I. (2022). Novel internal measurements of ion cyclotron frequency range fast-ion driven modes. Nuclear Fusion, 62(2), Article 026023. https://doi.org/10.1088/1741-4326/ac3d6a

@article{813f1897b5ad4cf4872ef397e2913c8e,

title = "Novel internal measurements of ion cyclotron frequency range fast-ion driven modes",

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 ( ) 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, k ⊥ ρ fast ⪆ 1, consistent with the cyclotron harmonic wave branch of the magnetoacoustic cyclotron instability, 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.",

keywords = "Doppler backscattering, energetic particles, ion cyclotron emission",

author = "Crocker, {N. A.} and Tang, {S. X.} and Thome, {K. E.} and Lestz, {J. B.} and Belova, {E. V.} and A. Zalzali and Dendy, {R. O.} and Peebles, {W. A.} and Barada, {K. K.} and R. Hong and Rhodes, {T. L.} and G. Wang and L. Zeng and Carter, {T. A.} and Degrandchamp, {G. H.} and Heidbrink, {W. W.} and Pinsker, {R. I.}",

note = "Publisher Copyright: {\textcopyright} 2022 The Author(s). Published on behalf of IAEA by IOP Publishing Ltd.",

year = "2022",

month = feb,

doi = "10.1088/1741-4326/ac3d6a",

language = "English",

volume = "62",

journal = "Nuclear Fusion",

issn = "0029-5515",

publisher = "IOP Publishing",

number = "2",

}

Crocker, NA, Tang, SX, Thome, KE, Lestz, JB, Belova, EV, Zalzali, A, Dendy, RO, Peebles, WA, Barada, KK, Hong, R, Rhodes, TL, Wang, G, Zeng, L, Carter, TA, Degrandchamp, GH, Heidbrink, WW & Pinsker, RI 2022, 'Novel internal measurements of ion cyclotron frequency range fast-ion driven modes', Nuclear Fusion, vol. 62, no. 2, 026023. https://doi.org/10.1088/1741-4326/ac3d6a

TY - JOUR

T1 - Novel internal measurements of ion cyclotron frequency range fast-ion driven modes

AU - Crocker, N. A.

AU - Tang, S. X.

AU - Thome, K. E.

AU - Lestz, J. B.

AU - Belova, E. V.

AU - Zalzali, A.

AU - Dendy, R. O.

AU - Peebles, W. A.

AU - Barada, K. K.

AU - Hong, R.

AU - Rhodes, T. L.

AU - Wang, G.

AU - Zeng, L.

AU - Carter, T. A.

AU - Degrandchamp, G. H.

AU - Heidbrink, W. W.

AU - Pinsker, R. I.

PY - 2022/2

Y1 - 2022/2

N2 - Novel internal measurements and analysis of ion cyclotron frequency range fast-ion driven modes in DIII-D are presented. Observations, including internal density fluctuation ( ) 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, k ⊥ ρ fast ⪆ 1, consistent with the cyclotron harmonic wave branch of the magnetoacoustic cyclotron instability, 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.

AB - Novel internal measurements and analysis of ion cyclotron frequency range fast-ion driven modes in DIII-D are presented. Observations, including internal density fluctuation ( ) 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, k ⊥ ρ fast ⪆ 1, consistent with the cyclotron harmonic wave branch of the magnetoacoustic cyclotron instability, 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.

KW - Doppler backscattering

KW - energetic particles

KW - ion cyclotron emission

UR - http://www.scopus.com/inward/record.url?scp=85123926348&partnerID=8YFLogxK

U2 - 10.1088/1741-4326/ac3d6a

DO - 10.1088/1741-4326/ac3d6a

M3 - Article

AN - SCOPUS:85123926348

SN - 0029-5515

VL - 62

JO - Nuclear Fusion

JF - Nuclear Fusion

IS - 2

M1 - 026023

ER -

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

Abstract

Keywords

UN SDGs

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