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

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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.",

author = "G. Taylor and Efthimion, {P. C.} and Leblanc, {B. P.} and Carter, {M. D.} and Caughman, {J. B.} and Wilgen, {J. B.} and J. Preinhaelter and Harvey, {R. W.} and Sabbagh, {S. A.}",

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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

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

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