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Title: Inner-shell radiation from wire array implosions on the Zebra generator

Implosions of brass wire arrays on Zebra have produced L-shell radiation as well as inner-shell Kα and Kβ transitions. The L-shell radiation comes from ionization stages around the Ne-like charge state that is largely populated by a thermal electron energy distribution function, while the K-shell photons are a result of high-energy electrons ionizing or exciting an inner-shell (1s) electron from ionization stages around Ne-like. The K- and L-shell radiations were captured using two time-gated and two axially resolved time-integrated spectrometers. The electron beam was measured using a Faraday cup. A multi-zone non-local thermodynamic equilibrium pinch model with radiation transport is used to model the x-ray emission from experiments for the purpose of obtaining plasma conditions. These plasma conditions are used to discuss some properties of the electron beam generated by runaway electrons. A simple model for runaway electrons is examined to produce the Kα radiation, but it is found to be insufficient.
Authors:
; ;  [1] ; ; ; ; ; ; ; ; ;  [2] ;  [3] ;  [4]
  1. Plasma Physics Division, Naval Research Laboratory, Washington, District of Columbia 20375 (United States)
  2. Physics Department, University of Nevada, Reno, Nevada 89557 (United States)
  3. Consultant to NRL through Engility Corp., Chantilly, Virginia 20151 (United States)
  4. Berkeley Research Associates, Beltsville, Maryland 20705 (United States)
Publication Date:
OSTI Identifier:
22252011
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 21; Journal Issue: 3; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; BRASS; CHARGE STATES; ELECTRON BEAMS; ENERGY SPECTRA; FARADAY CUPS; IMPLOSIONS; IONIZATION; K SHELL; L SHELL; LTE; PLASMA; RUNAWAY ELECTRONS; SPECTROMETERS; WIRES; X RADIATION