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

Diagnostics and Control

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

14 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

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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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doi = "10.1088/0741-3335/58/5/054004",

language = "English",

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T1 - Identification of island-induced Alfvén eigenmodes in a reversed field pinch

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

UR - https://www.scopus.com/pages/publications/84965064783

U2 - 10.1088/0741-3335/58/5/054004

DO - 10.1088/0741-3335/58/5/054004

M3 - Article

AN - SCOPUS:84965064783

SN - 0741-3335

VL - 58

JO - Plasma Physics and Controlled Fusion

JF - Plasma Physics and Controlled Fusion

IS - 5

M1 - 054004

ER -

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

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