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Title: Microwave scattering from laser spark in air

Abstract

In this paper, microwave Mie scattering from a laser-induced plasma in atmospheric air is computed. It shows that the scattered microwave transitions from coherent Rayleigh scattering to Mie scattering based on the relative transparency of the laser-induced plasma at the microwave frequency. The microwave penetration in the plasma alters from total transparency to partial shielding due to the sharp increase of the electron number density within the avalanche ionization phase. The transition from Rayleigh scattering to Mie scattering is verified by both the temporal evolution of the scattered microwave and the homogeneity of polar scattering plots.

Authors:
;  [1];  [2]
  1. Mechanical, Aerospace and Biomedical Engineering, University of Tennessee, Knoxville, Tennessee 37996 (United States)
  2. Mechanical and Aerospace Engineering, Princeton University, Princeton, New Jersey 08544 (United States)
Publication Date:
OSTI Identifier:
22089441
Resource Type:
Journal Article
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 112; Journal Issue: 6; Other Information: (c) 2012 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0021-8979
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; AIR; COMPUTERIZED SIMULATION; DENSITY; ELECTRONS; IONIZATION; LASER RADIATION; LASER-PRODUCED PLASMA; LIGHT TRANSMISSION; MICROWAVE RADIATION; OPACITY; PLASMA DENSITY; RAYLEIGH SCATTERING

Citation Formats

Sawyer, Jordan, Zhili, Zhang, and Shneider, Mikhail N. Microwave scattering from laser spark in air. United States: N. p., 2012. Web. doi:10.1063/1.4752261.
Sawyer, Jordan, Zhili, Zhang, & Shneider, Mikhail N. Microwave scattering from laser spark in air. United States. https://doi.org/10.1063/1.4752261
Sawyer, Jordan, Zhili, Zhang, and Shneider, Mikhail N. 2012. "Microwave scattering from laser spark in air". United States. https://doi.org/10.1063/1.4752261.
@article{osti_22089441,
title = {Microwave scattering from laser spark in air},
author = {Sawyer, Jordan and Zhili, Zhang and Shneider, Mikhail N.},
abstractNote = {In this paper, microwave Mie scattering from a laser-induced plasma in atmospheric air is computed. It shows that the scattered microwave transitions from coherent Rayleigh scattering to Mie scattering based on the relative transparency of the laser-induced plasma at the microwave frequency. The microwave penetration in the plasma alters from total transparency to partial shielding due to the sharp increase of the electron number density within the avalanche ionization phase. The transition from Rayleigh scattering to Mie scattering is verified by both the temporal evolution of the scattered microwave and the homogeneity of polar scattering plots.},
doi = {10.1063/1.4752261},
url = {https://www.osti.gov/biblio/22089441}, journal = {Journal of Applied Physics},
issn = {0021-8979},
number = 6,
volume = 112,
place = {United States},
year = {Sat Sep 15 00:00:00 EDT 2012},
month = {Sat Sep 15 00:00:00 EDT 2012}
}