Identification of forbidden emission lines from highly ionized tungsten ions in VUV wavelength range in LHD for ITER edge plasma diagnostics

Tetsutarou Oishi,Shigeru Morita,Daiji Kato,Izumi Murakami,Hiroyuki A. Sakaue,Yasuko Kawamoto,Motoshi Goto

Nuclear Materials and Energy（2021）

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摘要

•M1 forbidden lines of W29+~W39+ were observed in VUV 500~900 Å range in LHD.•This is the first observation of tungsten M1 lines in VUV range in fusion plasmas.•W37+ 646.7 Å, W38+ 532.9 Å and 559.1 Å are useful for the spectroscopic diagnostics.•The line identification could improve the tungsten diagnostics in ITER edge plasmas.

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关键词

Plasma spectroscopy,Vacuum ultraviolet,Magnetically confined fusion,Impurity transport,Highly ionized tungsten ions,Magnetic-dipole transition

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