Study of Low-Z EUV Spectra from Laboratory Plasma and EBIT Experiments

This paper provides an analysis of recent experimental EUV and soft x-ray Oxygen and Carbon spectra from the NSTX, SSPX, compact laser facility ``Sparky'', and EBIT-I plasma devices. Additionally, Nitrogen lines in EUV spectra from EBIT-I are identified and used to benchmark a Nitrogen kinetic model. In this study, non-LTE kinetic models of C, N, and O are utilized. Our approach compares the features of experimental spectra from Tokamak, Spheromak, and EBIT with those from ``Sparky'' spectra generated under various plasma conditions. The emitted EUV radiation we examine generally falls in the 90 {\AA} to 260 {\AA} wavelength range. Furthermore, the most intense lines from He-like ions of C and O in the soft X-ray region (20 {\AA} - 40 {\AA}) are observed. This research is being supported by DOE under grant DE-FG02-08ER54951 and in part under NNSA Cooperative Agreements DE-FC52-06NA27588 and DE-FC52-06NA27586. Work at LLNL was performed under auspices of the DOE under contract DE-AC52-07NA2344.