Spectral and Atomic Physics Analysis of Xenon L-Shell Emission From High Energy Laser Produced Plasmas
POSTER
Abstract
The spectrum of the L-shell (n$=$2) radiation in mid to high-Z ions is useful for probing plasma conditions in the multi-keV temperature range. Xenon in particular with its L-shell radiation centered around 4.5 keV is copiously produced from plasmas with electron temperatures in the 5-10 keV range. We report on a series of time-resolved L-shell Xe spectra measured with the NIF X-ray Spectrometer (NXS) in high-energy long-pulse (\textgreater 10 ns) laser produced plasmas at the National Ignition Facility. The resolving power of the NXS is sufficiently high (E/$\partial $E \textgreater 100) in the 4-5 keV spectral band that the emission from different charge states is observed. An analysis of the time resolved L-shell spectrum of Xe is presented along with spectral modeling by detailed radiation transport and atomic physics from the SCRAM code and comparison with predictions from HYDRA a radiation-hydrodynamics code with inline atomic-physics from CRETIN.
*This work was performed under the auspices of the U.S. Department of Energy by LLNL under Contract DE-AC52-07NA27344.