Efficient coupling of thermal electron Bernstein waves to the ordinary electromagnetic mode on the National Spherical Torus Experiment

G. Taylor; P. C. Efthimion; B. P. Leblanc; M. D. Carter; J. B. Caughman; J. B. Wilgen; J. Preinhaelter; R. W. Harvey; S. A. Sabbagh

doi:10.1063/1.1891065

Efficient coupling of thermal electron Bernstein waves to the ordinary electromagnetic mode on the National Spherical Torus Experiment

G. Taylor
, P. C. Efthimion
, B. P. Leblanc
, M. D. Carter
, J. B. Caughman
, J. B. Wilgen
, J. Preinhaelter
, R. W. Harvey
, S. A. Sabbagh

Fusion Technology

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

20 Scopus citations

Abstract

Efficient coupling of thermal electron Bernstein waves (EBW) to ordinary-mode (O -mode) electromagnetic radiation has been measured in plasmas heated by energetic neutral beams and high harmonic fast waves in the National Spherical Torus Experiment (NSTX) [M. Ono, S. Kaye, M. Peng, Proceedings of the 17th IAEA Fusion Energy Conference, edited by S. Spak (IAEA, Vienna, Austria, 1999), Vol. 3, p. 1135]. The EBW to electromagnetic mode coupling efficiency was measured to be 0.8±0.2, compared to a numerical EBW modeling prediction of 0.65. The observation of efficient EBW coupling to O mode, in relatively good agreement with numerical modeling, is a necessary prerequisite for implementing a proposed high power EBW current drive system on NSTX.

Original language	English
Pages (from-to)	1-7
Number of pages	7
Journal	Physics of Plasmas
Volume	12
Issue number	5
DOIs	https://doi.org/10.1063/1.1891065
State	Published - May 2005

Funding

This work was supported by U.S. Department of Energy Contract No. DE-AC02-76CH03073 and by a U.S. Department of Energy research grant which is part of a program to encourage innovations in magnetic fusion energy diagnostic systems.

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10.1063/1.1891065

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title = "Efficient coupling of thermal electron Bernstein waves to the ordinary electromagnetic mode on the National Spherical Torus Experiment",

abstract = "Efficient coupling of thermal electron Bernstein waves (EBW) to ordinary-mode (O -mode) electromagnetic radiation has been measured in plasmas heated by energetic neutral beams and high harmonic fast waves in the National Spherical Torus Experiment (NSTX) [M. Ono, S. Kaye, M. Peng, Proceedings of the 17th IAEA Fusion Energy Conference, edited by S. Spak (IAEA, Vienna, Austria, 1999), Vol. 3, p. 1135]. The EBW to electromagnetic mode coupling efficiency was measured to be 0.8±0.2, compared to a numerical EBW modeling prediction of 0.65. The observation of efficient EBW coupling to O mode, in relatively good agreement with numerical modeling, is a necessary prerequisite for implementing a proposed high power EBW current drive system on NSTX.",

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year = "2005",

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doi = "10.1063/1.1891065",

language = "English",

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T1 - Efficient coupling of thermal electron Bernstein waves to the ordinary electromagnetic mode on the National Spherical Torus Experiment

AU - Taylor, G.

AU - Efthimion, P. C.

AU - Leblanc, B. P.

AU - Carter, M. D.

AU - Caughman, J. B.

AU - Wilgen, J. B.

AU - Preinhaelter, J.

AU - Harvey, R. W.

AU - Sabbagh, S. A.

PY - 2005/5

Y1 - 2005/5

N2 - Efficient coupling of thermal electron Bernstein waves (EBW) to ordinary-mode (O -mode) electromagnetic radiation has been measured in plasmas heated by energetic neutral beams and high harmonic fast waves in the National Spherical Torus Experiment (NSTX) [M. Ono, S. Kaye, M. Peng, Proceedings of the 17th IAEA Fusion Energy Conference, edited by S. Spak (IAEA, Vienna, Austria, 1999), Vol. 3, p. 1135]. The EBW to electromagnetic mode coupling efficiency was measured to be 0.8±0.2, compared to a numerical EBW modeling prediction of 0.65. The observation of efficient EBW coupling to O mode, in relatively good agreement with numerical modeling, is a necessary prerequisite for implementing a proposed high power EBW current drive system on NSTX.

AB - Efficient coupling of thermal electron Bernstein waves (EBW) to ordinary-mode (O -mode) electromagnetic radiation has been measured in plasmas heated by energetic neutral beams and high harmonic fast waves in the National Spherical Torus Experiment (NSTX) [M. Ono, S. Kaye, M. Peng, Proceedings of the 17th IAEA Fusion Energy Conference, edited by S. Spak (IAEA, Vienna, Austria, 1999), Vol. 3, p. 1135]. The EBW to electromagnetic mode coupling efficiency was measured to be 0.8±0.2, compared to a numerical EBW modeling prediction of 0.65. The observation of efficient EBW coupling to O mode, in relatively good agreement with numerical modeling, is a necessary prerequisite for implementing a proposed high power EBW current drive system on NSTX.

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DO - 10.1063/1.1891065

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Efficient coupling of thermal electron Bernstein waves to the ordinary electromagnetic mode on the National Spherical Torus Experiment

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