EUV spectra of highly-charged ions W${}^{54+}$-W${}^{63+}$ relevant to ITER diagnostics

Abstract

We report the first measurements and detailed analysis of extreme ultraviolet (EUV) spectra (4 nm to 20 nm) of highly-charged tungsten ions W${}^{54+}$ to W${}^{63+}$ obtained with an electron beam ion trap (EBIT). Collisional-radiative modelling is used to identify strong electric-dipole and magnetic-dipole transitions in all ionization stages. These lines can be used for impurity transport studies and temperature diagnostics in fusion reactors, such as ITER. Identifications of prominent lines from several W ions were confirmed by measurement of isoelectronic EUV spectra of Hf, Ta, and Au. We also discuss the importance of charge exchange recombination for correct description of ionization balance in the EBIT plasma.

arXiv comment11 pages, 4 figures

References in corpus (4)

• Accelerated Recombination due to Resonant Deexcitation of Metastable States
• Spectra of W${}^{39+}$-W${}^{47+}$ in the 12 nm to 20 nm region observed with an EBIT light source
• A High Efficiency Ultra High Vacuum Compatible Flat Field Spectrometer for EUV Wavelengths
• Density dependence of the forbidden lines in Ni-like tungsten

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