Laser Diagnostics of Content of Hydrogen Isotopes in the Globus-M2 Tokamak Wall

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发表日期：

2024年6月1日

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A. G. Razdobarin,
O. S. Medvedev,
I. M. Bukreev,
D. L. Bogachev,
A. M. Dmitriev,
D. I. Elets,
E. V. Smirnova,
L. A. Snigirev,
V. B. Minaev,
A. N. Novokhatsky,
I. V. Miroshnikov,
S. V. Filippov,
M. V. Grishaev,
Yu. M. Gasparyan

摘要

Abstract

Mock-up of the system for remote monitoring of the accumulation of hydrogen isotopes in the walls of the Globus-M2 tokamak was assembled and tested. The measurements were performed using the LIA-QMS laser diagnostics (laser-induced ablation with registration using quadrupole mass-spectrometry). The data were obtained on the content of hydrogen isotopes in deposits appearing after exposing tungsten collectors to the loads in the volume of the Globus M tokamak. After testing the diagnostics under laboratory conditions, it was mounted at the Globus-M2 facility. In-situ measurements of the content of hydrogen isotopes in the graphite tiles of the tokamak divertor were performed. The possibility of combining the L-IA‑QMS diagnostics with the LIBS (laser-induced emission spectroscopy) diagnostics has been confirmed, in order to obtain information on the composition of the ablated material. In addition, the LIBS method was used for obtaining the deuterium/protium isotopic ratio during measurements in the Globus-M2 facility.