@article{oai:nifs-repository.repo.nii.ac.jp:00010534, author = {SUZUKI, Chihiro and MURAKAMI, Izumi and KOIKE, F. and Higashiguchi, Takeshi and SAKAUE, Hiroyuki A. and TAMURA, Naoki and SUDO, Shigeru and O'Sullivan, G.}, journal = {X-Ray Spectrometry}, month = {Jun}, note = {0000-0001-6536-9034, We are developing an experimental database of extreme ultraviolet spectra from highly charged ions using optically thin high-temperature plasmas produced in the Large Helical Device. Spectra from a variety of elements with atomic numbers ranging from 36 to 83 have been systematically recorded in the range of 1–20 nm by a grazing incidence spectrometer. For higher Z elements from tin onward, discrete or quasicontinuum spectral features from n=4 (N-shell) ions are mainly observed depending upon the plasma temperature, which leads to some new experimental identifications of spectral lines. On the other hand, major emitters are n=3 (M-shell) ions for medium Z elements from krypton to ruthenium. The calculated wavelengths for Δn≠0 transitions agree well with the measurements and the calculated wavelengths are systematically shifted to shorter wavelengths for Δn=0 transitions associated with inner-subshell excited configurations.}, pages = {78--84}, title = {Development of an experimental database of EUV spectra from highly charged ions of medium to high Z elements in the Large Helical Device plasmas}, volume = {49}, year = {2019} }