1-D non-LTE K- and L-shell spectroscopic simulation of KR gas puff on Z

摘要

Summary form only given. A series of pulsed power driven recent Kr gas-puff experiments on the Sandia National Laboratories Z machine have produced intense X-rays in the multi-keV photon energy range. Krypton spectra from Z pinch implosions can be used to analyze the presence and dynamics of the emitting regions, which could dominate the Kr K- and L-shell yields. This theoretical investigation of highly charged high atomic number elements such as Kr is also a very useful tool for validation of atomic and plasma modeling. We have developed detailed atomic structure and collisional data for the full K-, L-and partial M-shell of Kr using the Flexible Atomic Code (FAC). Our non-LTE atomic model includes all collisional and recombination processes, including state-specific dielectronic recombination (DR), that significantly affect ionization balance and spectra of Kr plasmas at the temperatures and densities of concern. The model self-consistently couples ionization physics, the radiation field, and radiation hydrodynamic. We will present a detailed description of the model and synthetic K- and L-shell spectra with a multifrequency radiation transport scheme from the emission regions determined from Kr 1D simulations and compare with several experimental data of various profiles on the Z machine.