Interaction of the electron density fluctuations with electron cyclotron waves from the equatorial launcher in ITER

A. Snicker; E. Poli; O. Maj; L. Guidi; A. Köhn; H. Weber; G. D. Conway; M. Henderson; G. Saibene

doi:10.1088/1361-6587/aa8f1a

Interaction of the electron density fluctuations with electron cyclotron waves from the equatorial launcher in ITER

A. Snicker, E. Poli, O. Maj, L. Guidi, A. Köhn, H. Weber, G. D. Conway, M. Henderson, G. Saibene

Not published at VTT

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Abstract

We present a numerical investigation of electron cyclotron beams interacting with electron density fluctuations in the ITER 15 MA H-mode scenario. In particular, here we study how the beam from the equatorial launcher, which shall be utilized to influence the sawtooth instability, is affected by the fluctuations. Moreover, we present the theory and first estimates of the power that is scattered from the injected O-mode to a secondary X-mode in the presence of the fluctuations. It is shown that for ITER parameters the scattered power stays within acceptable limits and broadening of the equatorial beams is less than those from the upper launcher.

Original language	English
Article number	014020
Journal	Plasma Physics and Controlled Fusion
Volume	60
Issue number	1
DOIs	https://doi.org/10.1088/1361-6587/aa8f1a
Publication status	Published - 1 Jan 2018
MoE publication type	A1 Journal article-refereed

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10.1088/1361-6587/aa8f1a

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abstract = "We present a numerical investigation of electron cyclotron beams interacting with electron density fluctuations in the ITER 15 MA H-mode scenario. In particular, here we study how the beam from the equatorial launcher, which shall be utilized to influence the sawtooth instability, is affected by the fluctuations. Moreover, we present the theory and first estimates of the power that is scattered from the injected O-mode to a secondary X-mode in the presence of the fluctuations. It is shown that for ITER parameters the scattered power stays within acceptable limits and broadening of the equatorial beams is less than those from the upper launcher.",

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AU - Snicker, A.

AU - Poli, E.

AU - Maj, O.

AU - Guidi, L.

AU - Köhn, A.

AU - Weber, H.

AU - Conway, G. D.

AU - Henderson, M.

AU - Saibene, G.

PY - 2018/1/1

Y1 - 2018/1/1

N2 - We present a numerical investigation of electron cyclotron beams interacting with electron density fluctuations in the ITER 15 MA H-mode scenario. In particular, here we study how the beam from the equatorial launcher, which shall be utilized to influence the sawtooth instability, is affected by the fluctuations. Moreover, we present the theory and first estimates of the power that is scattered from the injected O-mode to a secondary X-mode in the presence of the fluctuations. It is shown that for ITER parameters the scattered power stays within acceptable limits and broadening of the equatorial beams is less than those from the upper launcher.

AB - We present a numerical investigation of electron cyclotron beams interacting with electron density fluctuations in the ITER 15 MA H-mode scenario. In particular, here we study how the beam from the equatorial launcher, which shall be utilized to influence the sawtooth instability, is affected by the fluctuations. Moreover, we present the theory and first estimates of the power that is scattered from the injected O-mode to a secondary X-mode in the presence of the fluctuations. It is shown that for ITER parameters the scattered power stays within acceptable limits and broadening of the equatorial beams is less than those from the upper launcher.

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SN - 0741-3335

VL - 60

JO - Plasma Physics and Controlled Fusion

JF - Plasma Physics and Controlled Fusion

IS - 1

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ER -

Interaction of the electron density fluctuations with electron cyclotron waves from the equatorial launcher in ITER

Abstract

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