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Abstract <p>The work presents the results of experiments on the study of fast particle losses to the wall in the Globus-M2 tokamak under conditions of excitation of toroidal Alfvén instabilities using a pyrometer developed at the Ioffe Institute. Data on the time evolution of the wall temperature and local heat flux to the wall during the instability development are presented. The origin of the separation of these quantities into coherent and incoherent components is discussed. Experimental dependences of the increase in wall temperature and heat flux on the instability amplitude are considered. The results of the simulation of fast particle losses during the development of Alfvén-type instabilities are analyzed. Based on these results and experimental data, conclusions are drawn regarding the mechanism of fast particle losses during the interaction with an Alfvén wave.</p>

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First Observation of Heating of the Globus-M2 Tokamak Wall by Fast Ions Using a Two-Color Pyrometer during Excitation of Toroidal Alfvén Eigenmodes

  • 期刊论文

  • 发表日期：

    2025年11月1日

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  • N. N. Bakharev,
  • O. M. Skrekel,
  • A. S. Aleksandrov,
  • I. M. Balachenkov,
  • V. I. Varfolomeev,
  • A. V. Voronin,
  • V. K. Gusev,
  • A. A. Kapralov,
  • E. O. Kiselev,
  • V. B. Minaev,
  • Yu. V. Petrov,
  • N. V. Sakharov,
  • G. Yu. Sotnikova,
  • A. Yu. Telnova,
  • V. A. Tokarev,
  • E. M. Khilkevich,
  • A. E. Shevelev,
  • P. B. Shchegolev

摘要

Abstract

The work presents the results of experiments on the study of fast particle losses to the wall in the Globus-M2 tokamak under conditions of excitation of toroidal Alfvén instabilities using a pyrometer developed at the Ioffe Institute. Data on the time evolution of the wall temperature and local heat flux to the wall during the instability development are presented. The origin of the separation of these quantities into coherent and incoherent components is discussed. Experimental dependences of the increase in wall temperature and heat flux on the instability amplitude are considered. The results of the simulation of fast particle losses during the development of Alfvén-type instabilities are analyzed. Based on these results and experimental data, conclusions are drawn regarding the mechanism of fast particle losses during the interaction with an Alfvén wave.