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Influence of High-Temperature Effects on Interpretation of Probing Wave Time Delay in the ITER Refractometery Measurements

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Abstract

In modern large-sized tokamaks and those under construction, for example, in ITER, when measuring the average plasma electron density using the refractometry technique, it becomes necessary to study different effects that affect the measurement accuracy. This paper presents the results from studies of the high-temperature effects that can affect the interpretation of delay time measurements of the probing microwave signal in the ITER refractometry diagnostics. The criteria for applicability of different plasma models (“cold” plasma, modified “cold” plasma, and “hot plasma”) are obtained for calculating the plasma refractive index and interpreting the delay times that will be measured using the refractometry diagnostics of the ITER plasma. In the second article, based on the results obtained in this article, we will consider the influence of the high-temperature effects on the accuracy of determining the mean density using the refractometry diagnostics.

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Authors and Affiliations

  1. Troitsk Institute for Innovation and Fusion Research, 142190, Moscow, Russia

    K. Yu. Afonin & V. G. Petrov

  2. Moscow Institute of Physics and Technology (National Research University), 141701, Dolgoprudny, Russia

    K. Yu. Afonin

  3. International Fusion Projects Coordinating Centre, 123182, Moscow, Russia

    K. Yu. Afonin & V. G. Petrov

Authors
  1. K. Yu. Afonin
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  2. V. G. Petrov
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Correspondence to K. Yu. Afonin.

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Translated by I. Grishina

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Afonin, K.Y., Petrov, V.G. Influence of High-Temperature Effects on Interpretation of Probing Wave Time Delay in the ITER Refractometery Measurements. Plasma Phys. Rep. 47, 337–344 (2021). https://doi.org/10.1134/S1063780X21040012

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  • DOI: https://doi.org/10.1134/S1063780X21040012

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