Identification of island-induced Alfvén eigenmodes in a reversed field pinch

C. R. Cook; C. C. Hegna; J. K. Anderson; K. J. McCollam; J. Boguski; R. Feng; J. J. Koliner; D. A. Spong; S. P. Hirshman

doi:10.1088/0741-3335/58/5/054004

Identification of island-induced Alfvén eigenmodes in a reversed field pinch

C. R. Cook, C. C. Hegna, J. K. Anderson, K. J. McCollam, J. Boguski, R. Feng, J. J. Koliner, D. A. Spong, S. P. Hirshman

Plasma Theory and Modeling

Research output: Contribution to journal › Article › peer-review

13 Scopus citations

Abstract

The modification of the shear Alfvén spectrum due to a core resonant magnetic island is used to explain the Alfvénic activity observed on the Madison symmetric torus (MST) reversed-field pinch during neutral beam injection. Theoretical studies show that the Alfvén continua in the core of the island provide a gap in which the observed Alfvénic bursts reside. Numerical simulations using a new code called SIESTAlfvén have identified the bursts as the first observation of an island-induced Alfvén eigenmode (IAE) in an RFP. The IAE arises from a helical coupling of harmonics due to the magnetic island.

Original language	English
Article number	054004
Journal	Plasma Physics and Controlled Fusion
Volume	58
Issue number	5
DOIs	https://doi.org/10.1088/0741-3335/58/5/054004
State	Published - Apr 8 2016

Funding

This material is based upon work supported by the U.S. Department of Energy Office of Science, Office of Fusion Energy Sciences program under Award Numbers DE-FG02- 99ER54546, DE-SC0006103, and DE-FC02-05ER54814.

Keywords

Alfvén
MHD
MST
magnetic island

UN SDGs

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

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10.1088/0741-3335/58/5/054004

Cite this

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title = "Identification of island-induced Alfv{\'e}n eigenmodes in a reversed field pinch",

abstract = "The modification of the shear Alfv{\'e}n spectrum due to a core resonant magnetic island is used to explain the Alfv{\'e}nic activity observed on the Madison symmetric torus (MST) reversed-field pinch during neutral beam injection. Theoretical studies show that the Alfv{\'e}n continua in the core of the island provide a gap in which the observed Alfv{\'e}nic bursts reside. Numerical simulations using a new code called SIESTAlfv{\'e}n have identified the bursts as the first observation of an island-induced Alfv{\'e}n eigenmode (IAE) in an RFP. The IAE arises from a helical coupling of harmonics due to the magnetic island.",

keywords = "Alfv{\'e}n, MHD, MST, magnetic island",

author = "Cook, {C. R.} and Hegna, {C. C.} and Anderson, {J. K.} and McCollam, {K. J.} and J. Boguski and R. Feng and Koliner, {J. J.} and Spong, {D. A.} and Hirshman, {S. P.}",

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AU - Cook, C. R.

AU - Hegna, C. C.

AU - Anderson, J. K.

AU - McCollam, K. J.

AU - Boguski, J.

AU - Feng, R.

AU - Koliner, J. J.

AU - Spong, D. A.

AU - Hirshman, S. P.

PY - 2016/4/8

Y1 - 2016/4/8

N2 - The modification of the shear Alfvén spectrum due to a core resonant magnetic island is used to explain the Alfvénic activity observed on the Madison symmetric torus (MST) reversed-field pinch during neutral beam injection. Theoretical studies show that the Alfvén continua in the core of the island provide a gap in which the observed Alfvénic bursts reside. Numerical simulations using a new code called SIESTAlfvén have identified the bursts as the first observation of an island-induced Alfvén eigenmode (IAE) in an RFP. The IAE arises from a helical coupling of harmonics due to the magnetic island.

AB - The modification of the shear Alfvén spectrum due to a core resonant magnetic island is used to explain the Alfvénic activity observed on the Madison symmetric torus (MST) reversed-field pinch during neutral beam injection. Theoretical studies show that the Alfvén continua in the core of the island provide a gap in which the observed Alfvénic bursts reside. Numerical simulations using a new code called SIESTAlfvén have identified the bursts as the first observation of an island-induced Alfvén eigenmode (IAE) in an RFP. The IAE arises from a helical coupling of harmonics due to the magnetic island.

KW - Alfvén

KW - MHD

KW - MST

KW - magnetic island

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JO - Plasma Physics and Controlled Fusion

JF - Plasma Physics and Controlled Fusion

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ER -

Identification of island-induced Alfvén eigenmodes in a reversed field pinch

Abstract

Funding

Keywords

UN SDGs

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