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Generalization of Modified SXB Method for Hydrogen to the Case of Isotope Mixture

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Abstract

A simulator of the kinetics of hydrogen isotopes recycling in plasma for the H-alpha diagnostics of the fuel ratio in a tokamak-reactor is proposed. The simulator represents a generalization of the well-known SXB method developed for determining the density of impurity flux from the vacuum vessel first wall into plasma from intensity of the spectral line of an atom or ion integrated with respect to wavelength within the spectral line width, to the case of an isotope mixture. The simulator allows on to determine the parameters of the fuel ratio for a mixture of deuterium and tritium hydrogen isotopes in real time (e.g., within 100 ms, according to the requirements specified for controlling the parameters of hydrogen isotopes in the ITER demonstration tokamak-reactor). The developed approach allows one to determined the flux density of hydrogen isotopes from the first wall into the plasma based on the results obtained by means of the high-resolution spectroscopy of the Balmer series lines without using the molecular spectra of hydrogen that are difficult to interpret. Calculations carried out for typical conditions of the edge plasma in the tokamak-reactors revealed that the flux density and fuel ratio in a certain part of the operational space of the reactor can be reconstructed with an acceptable accuracy. The role of the simulator for more accurate but more time-consuming interpretation of the measurements using the H-alpha diagnostics is discussed.

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ACKNOWLEDGMENTS

The authors are grateful to A.G. Alekseev, K.Yu. Vu-kolov, and V.S. Lisitsa for useful comments and collaboration in research related to “H-alpha and Visible Spectroscopy” diagnostics for ITER.

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Authors and Affiliations

  1. National Research Center “Kurchatov Institute”, 123098, Moscow, Russia

    A. B. Kukushkin, V. S. Neverov & R. I. Khusnutdinov

  2. National Research Nuclear University MEPhI, 115409, Moscow, Russia

    A. B. Kukushkin & R. I. Khusnutdinov

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  1. A. B. Kukushkin
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  2. V. S. Neverov
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  3. R. I. Khusnutdinov
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Correspondence to R. I. Khusnutdinov.

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Kukushkin, A.B., Neverov, V.S. & Khusnutdinov, R.I. Generalization of Modified SXB Method for Hydrogen to the Case of Isotope Mixture. Plasma Phys. Rep. 49, 179–193 (2023). https://doi.org/10.1134/S1063780X22601808

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