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Turbulence changes in laser enhanced laser induced plasmas

Published online by Cambridge University Press:  15 November 2010

D. L. WIGGINS ,
C. T. RAYNOR  and
J. A. JOHNSON III
D. L. WIGGINS
Affiliation:
Center for Plasma Science and Technology, Florida A & M University, Tallahassee, FL 32310, USA ([email protected])
C. T. RAYNOR
Affiliation:
Center for Plasma Science and Technology, Florida A & M University, Tallahassee, FL 32310, USA ([email protected])
J. A. JOHNSON III
Affiliation:
Center for Plasma Science and Technology, Florida A & M University, Tallahassee, FL 32310, USA ([email protected])
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Abstract

A neodymium-doped yttrium aluminum garnet laser of wavelength 0.532 μm with the maximum energy of 900 mJ creates plasmas at a focal point in air in the path of a 1 kW continuous wave fiber laser of wavelength 1.08 μm. We find that there is an unexpected influence on a standard set of turbulent parameters in these laser-induced plasmas. Specifically, the continuous wave laser increased the complexity in the turbulent fluctuations. The continuous wave laser reduces the characteristic fluctuation frequencies in the neutral lines. Furthermore, the continuous wave laser enhances turbulence energies in ions while it diminishes turbulence energies in neutrals.

Type
Papers
Information
Journal of Plasma Physics , Volume 77 , Issue 4 , August 2011 , pp. 479 - 491
Copyright
Copyright © Cambridge University Press 2010

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