Observation of Xenon EUV Spectra in Compact Helical System

We have carried out spectroscopic measurements of xenon (Xe) extreme ultraviolet (EUV) emissions in plasmas produced by a medium-size fusion-oriented torus device, Compact Helical System (CHS), for the development of reliable spectroscopic data of Xe ions. The EUV spectra have been measured in low density (<10 19 m �3 ) hydrogen plasma with Xe gas injection by an existing grazing incidence spectrometer. Electron density and temperature profiles are measured by Thomson scattering diagnostic. Observed spectral lines are compared with the results of HULLAC code calculation and charge exchanging collisions experiment. The charge states of Xe ions and transitions are inferred for several prominent peaks.