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Author(s):
R. Preuss, H. Yamada, M. Osakabe, S. Sakakibara, K. Tanaka, K.Y. Watanabe and A. Dinklage
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Title:
Determination of Uncertainties in the Machine Variables of LHD and CHS for Confinement Time Scaling
Date of publication:
July 2007
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Key words:
energy confinement time, international stellarator confinement database, Bayesian probability theory, confinemet scaling, uncertainty of data
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Abstract:
Detailed descriptions of the uncertainties in measurements of the effective minor radius, electron density and the diamagnetic energy content together with the uncertainty of the estimated absorbed power are presented for LHD and CHS. Data entries of both devices to the International Stellarator Confinement Database [ISCDB] are examined to study the impact of uncertainties on scaling expressions of the energy confinement time. It is proposed to employ Bayesian inference as a statistical tool for the determination of the scaling exponents.
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