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Title: Time resolved optical diagnostics of ZnO plasma plumes in air

We report dynamical evolution of laser ablated ZnO plasma plumes using interferometry and shadowgraphy; 2-D fast imaging and optical emission spectroscopy in air ambient at atmospheric pressure. Recorded interferograms using Nomarski interferometer and shadowgram images at various time delays show the presence of electrons and neutrals in the ablated plumes. The inference drawn from sign change of fringe shifts is consistent with two dimensional images of the plume and optical emission spectra at varying time delays with respect to ablating pulse. Zinc oxide plasma plumes are created by focusing 1.06 μm radiation on to ZnO target in air and 532 nm is used as probe beam.
Authors:
; ;  [1]
  1. Department of Physics, Indian Institute of Technology Kanpur, Kanpur - 208016 (U. P.) (India)
Publication Date:
OSTI Identifier:
22218577
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 20; Journal Issue: 10; Other Information: (c) 2013 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; 36 MATERIALS SCIENCE; AIR; ELECTRONS; EMISSION SPECTRA; EMISSION SPECTROSCOPY; INTERFEROMETERS; INTERFEROMETRY; LASER TARGETS; LASER-PRODUCED PLASMA; LASERS; PLASMA DIAGNOSTICS; PLASMA PRODUCTION; PLUMES; TIME DELAY; TIME RESOLUTION; TWO-DIMENSIONAL CALCULATIONS; ZINC OXIDES