K-shell radiation from Krypton Doped Symmetric Capsule Implosion Experiments on NIF

X-ray spectroscopy is used to diagnose plasma conditions of a symmetric capsule (symcap) target in ICF experiments on NIF. Small traces of krypton were added as a dopant to the deuterium gas inside the symcap target. The high areal density shell of the symcap target has minimal attenuation of the krypton K-shell emission. The fraction of krypton dopant was selected to minimally perturb the implosion, but large enough to be measured[1,2]. The krypton He-alpha and He-beta line emission was measured using the absolutely calibrated dHIRES built by PPPL[3]. Synthetic spectra generated from the NRL DRACHMA II code will be used to model the radiation to infer the plasma conditions. Drachma is a 1-D multi-zone non-LTE kinetics model with radiation transport. [1] T. Ma \textit{et al.,} RSI 87, 11E327 (2016) [2] H. Chen, T. Ma, R. Nora, et al, Phys Plasmas 24. 072715 (2017) [3] L. Gao \textit{et al.}, RSI \textbf{89}, 10F125 (2018) *Work supported by DOE/NNSA at NRL and U.S. DOE by LLNL under Contract No. DE-AC52-07NA27344. DISTRIBUTION A. Approved for public release: distribution unlimited.