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Highly charged tungsten spectra observed from JT-60U plasmas at $$T_{mbox{e}} approx$$ 8 and 14 keV

Yanagibayashi, Jun*; Nakano, Tomohide; Iwamae, Atsushi; Kubo, Hirotaka; Hasuo, Masahiro*; Itami, Kiyoshi

We observe the vacuum ultraviolet spectra of highly charged tungsten ions in plasmas at electron temperatures of 8 keV and 14 keV. The observed emission lines in a wavelength range of 2.6 $$sim$$ 3.2 nm for the plasma at 8 keV are identified to be the $$3mbox{p}_{3/2}-3mbox{d}_{5/2}$$ transitions of $$mbox{W}^{47+}-mbox{W}^{54 +}$$. The observed emission lines at 2.0 nm and 2.3 nm at 14 keV are identified to be the $$mbox{3p}_{1/2}-mbox{3d}_{3/2}$$ transitions of $$mbox{W}^{55 +}-mbox{W}^{61+}$$ and $$mbox{3s}_{1/2}-mbox{3p}_{3/2}$$ transitions of $$mbox{W}^{60 +}-mbox{W}^{63+}$$, respectively.



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