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Title: Acceleration of neutrals in a nanosecond laser produced nickel plasma

Time of flight dynamics of slow neutrals, fast neutrals, and ions from a nanosecond laser produced nickel (Ni) plasma are investigated. Species arrival times confirm the hypothesis that fast neutrals are formed by the recombination of fast ions with free electrons. Both neutrals and ions are found to accelerate for a short interval immediately after ablation, which is attributed to internal Coulomb forces which create electrostatic potentials resulting in the charged particle acceleration. This process is further enhanced by laser-plasma energy coupling. Emission from neutrals could be measured for longer axial distances in the plume compared to that of ions confirming that the ions recombine to form neutrals as they move away from the target surface.
Authors:
 [1] ;  [2] ;  [3] ;  [1]
  1. Ultrafast and Nonlinear Optics Lab, Light and Matter Physics Group, Raman Research Institute, Bangalore 560080 (India)
  2. (India)
  3. Laser and Nonlinear Optics Lab, Department of Physics, National Institute of Technology Calicut, Calicut 673601 (India)
Publication Date:
OSTI Identifier:
22407952
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 21; Journal Issue: 12; 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; ABLATION; ACCELERATION; ELECTRONS; IONS; LASER-PRODUCED PLASMA; NEUTRAL PARTICLES; NICKEL; RECOMBINATION; TIME-OF-FLIGHT METHOD