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Abstract <p>The laser-induced quenching diagnostics of atomic hydrogen in the Globus-M2 tokamak divertor is described. The analysis is based on 2D distributions of plasma parameters simulated in SOLPS-ITER code for one of the discharges. Modeling of the expected background signals in spectral lines, as well as the working quenching signals, was performed using a collision-radiative model of deuterium atoms. A time-modulated thulium fiber laser working at 1875 nm with a peak power of 5 W was taken for the modeling as the laser source. The existing Thomson scattering divertor optical layout will be used for both laser probing and collection the fluorescence signal, allowing measurements to be performed in the Globus-M2 divertor inner leg.</p>

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Laser-Induced Quenching for Measuring Deuterium Density in the Divertor of the Globus-M2 Tokamak

  • 期刊论文

  • 发表日期：

    2025年11月1日

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  • E. E. Mukhin,
  • S. Yu. Tolstyakov,
  • G. S. Kurskiev,
  • N. V. Ermakov,
  • N. S. Zhiltsov,
  • F. F. Forsh,
  • E. G. Kaveeva,
  • K. A. Kukushkin,
  • V. A. Rozhansky,
  • I. Yu. Senichenkov,
  • A. V. Gorbunov,
  • Yu. I. Tolpegina,
  • D. S. Panfilov

摘要

Abstract

The laser-induced quenching diagnostics of atomic hydrogen in the Globus-M2 tokamak divertor is described. The analysis is based on 2D distributions of plasma parameters simulated in SOLPS-ITER code for one of the discharges. Modeling of the expected background signals in spectral lines, as well as the working quenching signals, was performed using a collision-radiative model of deuterium atoms. A time-modulated thulium fiber laser working at 1875 nm with a peak power of 5 W was taken for the modeling as the laser source. The existing Thomson scattering divertor optical layout will be used for both laser probing and collection the fluorescence signal, allowing measurements to be performed in the Globus-M2 divertor inner leg.