Technical note on the linearity and power dependence of the diffusion coefﬁcient in W7-AS

Matthijs Van Berkel; Hans Zwart; GMD Hogeweij; MR de Baar

doi:10.1088/1361-6587/aa6a2b

Technical note on the linearity and power dependence of the diffusion coefﬁcient in W7-AS

Matthijs Van Berkel, Hans Zwart, GMD Hogeweij, MR de Baar

Electricity

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Abstract

Transient electron temperature measurements of a step power experiment at W7-AS are reassessed by direct comparison of the up- and downward responses of the electron temperature. The analysis shows that the response at some distance to the center behaves linearly and the model predicted responses based on a power-dependent diffusion coefficient that vary from the measured step responses.

Original language	English
Article number	062001
Number of pages <span style="color:red"p> <font size="1.5"> ✽ </span> </font>	4
Journal	Plasma Physics and Controlled Fusion
Volume	59
Issue number	6
DOIs	https://doi.org/10.1088/1361-6587/aa6a2b
Publication status	Published - 3 May 2017

Keywords

electron heat transport
perturbative experiments
power dependence
stellarator
step response
W7-AS

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Van Berkel_2017_66830Submitted manuscript, 358 KB

http://iopscience.iop.org/article/10.1088/1361-6587/aa6a2b

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abstract = "Transient electron temperature measurements of a step power experiment at W7-AS are reassessed by direct comparison of the up- and downward responses of the electron temperature. The analysis shows that the response at some distance to the center behaves linearly and the model predicted responses based on a power-dependent diffusion coefficient that vary from the measured step responses.",

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AU - de Baar, MR

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KW - perturbative experiments

KW - power dependence

KW - stellarator

KW - step response

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Technical note on the linearity and power dependence of the diffusion coefﬁcient in W7-AS

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Keywords

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