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Article Dans Une Revue Applied Physics Letters Année : 2013

Simultaneous measurement of electron and heavy particle temperatures in He laser-induced plasma by Thomson and Rayleigh scattering

Krzysztof Dzierzega
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Agata Mendys
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Bartlomej Pokrzywka
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Witold Zawadzki
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Résumé

Thomson and Rayleigh scattering methods were applied to quantify the electron and heavy particle temperatures, as well as electron number density, in a laser spark in helium at atmospheric pressure. Plasma was created using 4.5 ns, 25 mJ pulses from Nd:YAG laser at 532 nm. Measurements, performed for the time interval between 20 ns and 800 ns after breakdown, show electron density and temperature to decrease from 7.8x1023 m 3 to 2.6x10^22 m 3 and from 95900K to 10350K, respectively. At the same time, the heavy particle temperature drops from only 47000K down to 4100K which indicates a two temperature plasma out of local isothermal equilibrium.
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Dates et versions

hal-00820393 , version 1 (04-05-2013)

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Krzysztof Dzierzega, Agata Mendys, Bartlomej Pokrzywka, Witold Zawadzki, Stéphane Pellerin. Simultaneous measurement of electron and heavy particle temperatures in He laser-induced plasma by Thomson and Rayleigh scattering. Applied Physics Letters, 2013, 102 (3), pp.134108. ⟨10.1063/1.4801467⟩. ⟨hal-00820393⟩
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