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Title: Study of ablation and implosion stages in wire arrays using coupled ultraviolet and X-ray probing diagnostics

Star and cylindrical wire arrays were studied using laser probing and X-ray radiography at the 1-MA Zebra pulse power generator at the University of Nevada, Reno. The Leopard laser provided backlighting, producing a laser plasma from a Si target which emitted an X-ray probing pulse at the wavelength of 6.65 Å. A spherically bent quartz crystal imaged the backlit wires onto X-ray film. Laser probing diagnostics at the wavelength of 266 nm included a 3-channel polarimeter for Faraday rotation diagnostic and two-frame laser interferometry with two shearing interferometers to study the evolution of the plasma electron density at the ablation and implosion stages. Dynamics of the plasma density profile in Al wire arrays at the ablation stage were directly studied with interferometry, and expansion of wire cores was measured with X-ray radiography. The magnetic field in the imploding plasma was measured with the Faraday rotation diagnostic, and current was reconstructed.
Authors:
; ; ; ;  [1] ;  [1] ;  [2]
  1. University of Nevada Reno, Reno, Nevada 89557 (United States)
  2. (Hungary)
Publication Date:
OSTI Identifier:
22489845
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 22; Journal Issue: 11; Other Information: (c) 2015 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; ABLATION; CRYSTALS; CYLINDRICAL CONFIGURATION; ELECTRON DENSITY; EXPANSION; FARADAY EFFECT; IMPLOSIONS; INTERFEROMETERS; LASER-PRODUCED PLASMA; MAGNETIC FIELDS; PLASMA DENSITY; POLARIMETERS; QUARTZ; SHEAR; SPHERICAL CONFIGURATION; ULTRAVIOLET RADIATION; WAVELENGTHS; WIRES; X-RAY RADIOGRAPHY