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Title: Mid-Atomic-Number Cylindrical Wire Array Precursor Plasma Studies on Zebra

The precursor plasmas from low wire number cylindrical wire arrays (CWAs) were previously shown to radiate at temperatures >300 eV for Ni-60 (94% Cu and 6% Ni) wires in experiments on the 1-MA Zebra generator. Continued research into precursor plasmas has studied additional midatomic-number materials including Cu and Alumel (95% Ni, 2% Al, 2% Mn, and 1% Si) to determine if the >300 eV temperatures are common for midatomic-number materials. Additionally, current scaling effects were observed by performing CWA precursor experiments at an increased current of 1.5 MA using a load current multiplier. Our results show an increase in a linear radiation yield of ~50% (16 versus 10 kJ/cm) for the experiments at increased current. However, plasma conditions inferred through the modeling of X-ray time-gated spectra are very similar for the precursor plasma in both current conditions.
Authors:
 [1] ;  [1] ;  [1] ;  [2] ;  [1] ;  [1] ;  [1] ;  [3]
  1. Univ. of Nevada, Reno, NV (United States)
  2. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
  3. Ecole Polytechnique (France)
Publication Date:
OSTI Identifier:
1184459
Report Number(s):
SAND--2014-18312J
Journal ID: ISSN 0093-3813; 537888
Grant/Contract Number:
AC04-94AL85000
Type:
Accepted Manuscript
Journal Name:
IEEE Transactions on Plasma Science
Additional Journal Information:
Journal Volume: 43; Journal Issue: 8; Journal ID: ISSN 0093-3813
Publisher:
IEEE
Research Org:
Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States
Sponsoring Org:
USDOE National Nuclear Security Administration (NNSA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS kinetic modeling; wire array; x-ray spectra; Z-pinch