A method of interpreting the Balmer-alpha high-resolution spectroscopy for tokamak edge plasmas with account of divertor stray light

9th International Conference on Modern Techniques of Plasma Diagnostics and their Application

Neverov, V.S.^1 ; Kukushkin, A.B.^1,2 ; Alekseev, A.G.^1

National Research Center, Kurchatov Institute, Kurchatov square 1, Moscow

123182, Russia^1

National Research Nuclear University MEPhI, Kashirskoe shosse 31, Moscow

115409, Russia^2

关键词: Developed model;    Direct observations;    High-resolution spectroscopy;    ITER tokamak;    Spectral line;    Tokamak experiment;    Tokamak reactors;    Vacuum chambers;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/666/1/012004/pdf
DOI  :  10.1088/1742-6596/666/1/012004

来源: IOP

【 摘 要 】

A method is suggested for interpreting the data from the Balmer-alpha high- resolution spectroscopy diagnostics of the edge plasma in the tokamak main chamber, which additionally uses the data from direct observation of the divertor. Such an extension of the diagnostics is motivated by the fact that in a tokamak-reactor with the metal first wall, like ITER tokamak, a significant role of the divertor stray light (DSL), which is emitted by the plasma in the divertor in the same spectral line and reflected from the first wall of the vacuum chamber to a spectrometer in the main chamber, is expected. The results of the first applications of the developed model to interpret the data from the JET-ILW tokamak experiments, which simulate the conditions of occurrence of the DSL in ITER, are discussed.