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Title: Comparison of plasma temperature and electron density on nanosecond laser ablation of Cu and nano-Cu

Laser-induced breakdown spectroscopy is performed through the collection of spectra by spectral detection equipment at different delay times and distances from targets composed of Cu and nano-Cu, which are ablated using a Nd:YAG laser (532 nm, 10 ns, 10 Hz) in our experiments. The measured wavelength range is from 475 nm to 525 nm. Using the local thermodynamic equilibrium model, we analyze the characteristics of the plasma temperature and the electron number density for different distances between the target surface and the lens. The results show that when compared with the nano-Cu plasma case, the temperature of the Cu plasma is higher, while its electron number density is lower.
Authors:
;  [1] ;  [2] ; ;  [3] ;  [1] ;  [2] ;  [4]
  1. Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012 (China)
  2. (Jilin University), Changchun 130012 (China)
  3. State Key Laboratory of Laser Interaction with Matter, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033 (China)
  4. (China)
Publication Date:
OSTI Identifier:
22408248
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 22; Journal Issue: 3; 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; COPPER; DISTANCE; ELECTRON DENSITY; ELECTRON TEMPERATURE; ION TEMPERATURE; LASER TARGETS; LENSES; LTE; NANOPARTICLES; NEODYMIUM LASERS; SPECTRA; SPECTROSCOPY; SURFACES; TIME DELAY