Characteristics of the electron beam driven K-shell emission from brass wire array implosions on the zebra generator

摘要

Summary form only given. Brass wire array implosions on Zebra have produced characteristic K-shell emission. These Kα and Kβ photons are a result of high-energy electrons (>~10 keV) ionizing or exciting a 1s bound electron from ionization stages around the Ne-like charge states. The electron beam was measured using a Faraday cup. The K- and L-shell radiation was captured using time-gated and time-integrated spectrometers. The L-shell radiation comes from ionization stages around the Ne-like charge state that is mostly populated by a thermal electron energy distribution function. X-ray imaging was accomplished using time-integrated and time-gated pinhole cameras, with one camera using a Ross filter pair to image the K-shell emission. The diagnostic suite included various filtered x-ray diodes, bolometers, and laser shadowgraphy. A multi-zone non-LTE kinetics pinch model with radiation transport is used to obtain the plasma conditions by matching the observed x-ray emission. Monte-Carlo simulations are employed to infer information about the electron energy distribution function for the runaway electrons.