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Ar plasma waveguide produced by a low-intensity femtosecond laser
Authors:Guanglong Chen  Xiaotao Geng  Tawfik Walid Mohamed  Hongxia Xu  Yiming Mi  Jaehoon Kim  Dong Eon Kim
Institution:1. Department of Lithospheric Research, University of Vienna, Althanstrasse 14, A-1090 Vienna, Austria;2. Analytical, Environmental, and Geo-Chemistry (AMGC), Vrije Universiteit Brussel (VUB), Pleinlaan 2, B-1050 Brussels, Belgium;3. Institute of Earth and Environmental Science, University of Potsdam, Karl-Liebknecht-Str. 24-25, D-14476 Potsdam-Golm, Germany;4. School of Science and Technology, Geology Division, University of Camerino, Via Gentile III da Varano, I-62032 Camerino, Italy;5. Aeronautics and Aerospace Department, von Karman Institute for Fluid Dynamics (VKI), Waterloosesteenweg 72, B-1640 Sint-Genesius-Rode, Belgium;6. Research group Electrochemical and Surface Engineering (SURF), Vrije Universiteit Brussel, Pleinlaan 2, B-1050 Brussels, Belgium;7. Dipartimento di Scienze e Tecnologie Aerospaziali, Politecnico di Milano, Via La Masa, 34, 20156 Milano, Italy;8. CNR-IOM-OGG c/o ESRF, 71 Avenue des Martyrs CS 40220, F-38043 Grenoble, France;9. Atomic and Mass Spectrometry Research Unit, Department of Chemistry, Ghent University, Krijgslaan, 281 - S12, B-9000 Ghent, Belgium;10. Natural History Museum (NHM), Burgring 7, A-1010 Vienna, Austria
Abstract:Using the interaction of a low-intensity femtosecond laser pulse (30 fs, 6 × 1015 Wcm? 2) with argon cluster jet produced from a slit nozzle, we experimentally probe the formation of a uniform plasma waveguide by the interferogram analysis. The results about evolution of plasma channel demonstrate that it is feasible to produce the plasma waveguide for an fs laser pulse of low-intensity. It takes tens of nanoseconds to form a plasma waveguide. The simulation by one-dimensional Gaussian plasma hydrodynamic expansion model indicates that the temperature of plasma channel is not high under this condition. Thus it takes tens of nanoseconds to form a plasma waveguide.
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