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Title: Interaction of high intensity laser with non-uniform clusters and enhanced X-ray emission

Laser irradiated clusters with non-uniform density variation are shown to broaden surface plasmon resonance very significantly. As the clusters get heated and expand hydro-dynamically, the Bremsstrahlung X-ray emission yield passes through a maximum in time. The maximum yield decreases with increase in non-uniformity in the electron density inside the clusters. At higher laser intensity, the nonlinearity in laser cluster interaction may arise even prior to electron heating, via the relativistic mass variation and the nonlinear restoration force on electrons. For clusters with radius less than one tenth of the laser wavelength, the restoration force nonlinearity dominates.
Authors:
 [1] ; ;  [2]
  1. Department of Physics, University of Maryland, College Park, Maryland 20742 (United States)
  2. Department of Physics, Indian Institute of Technology Delhi, New Delhi 110016 (India)
Publication Date:
OSTI Identifier:
22299698
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 21; Journal Issue: 10; 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; BREMSSTRAHLUNG; ELECTRON DENSITY; EMISSION; HEATING; IRRADIATION; LASERS; MASS; NONLINEAR PROBLEMS; RELATIVISTIC RANGE; SURFACES; VARIATIONS; WAVELENGTHS; X RADIATION; YIELDS