Experimental investigations of plasma perturbation in Thomson scattering applied to thermal plasma diagnostics - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Physical Review E : Statistical, Nonlinear, and Soft Matter Physics Année : 2006

Experimental investigations of plasma perturbation in Thomson scattering applied to thermal plasma diagnostics

Krzysztof Dzierzega
  • Fonction : Auteur correspondant
  • PersonId : 866323

Connectez-vous pour contacter l'auteur
Witold Zawadzki
  • Fonction : Auteur
  • PersonId : 866324
Bartlomej Pokrzywka
  • Fonction : Auteur
  • PersonId : 866325

Résumé

Time and space resolved measurements of Thomson scattering of 532 nm, 6 ns laser pulses were performed on argon thermal discharge plasma with electron temperature Te10 000 K and electron density 8x1022 m−3ne21023 m−3. From these measurements, variations of the electron density and temperature across the laser beam and their evolution during the laser pulse were determined. While the electron density is augmented by no more than a few percent the electron temperature is significantly increased along the axis of the laser beam due to laser heating. It is also shown that the higher initial electron density, the more disturbed is the plasma. The initial “undisturbed” electron density was derived by studying the spatial variations of ne within the laser beam. On the other hand, the initial electron temperature was determined by studying the temporal evolution of Te during the laser pulse and then by extrapolating the results to the origin of the pulse. Despite strong and nonlinear plasma heating by the Thomson scattered laser light, our study yields temperatures close to those obtained by modeling and time-resolved spectroscopic measurements.
Fichier non déposé

Dates et versions

hal-00449164 , version 1 (20-01-2010)

Identifiants

  • HAL Id : hal-00449164 , version 1

Citer

Krzysztof Dzierzega, Witold Zawadzki, Bartlomej Pokrzywka, Stéphane Pellerin. Experimental investigations of plasma perturbation in Thomson scattering applied to thermal plasma diagnostics. Physical Review E : Statistical, Nonlinear, and Soft Matter Physics, 2006, 74 (2), pp.026404-026409. ⟨hal-00449164⟩

Collections

UNIV-ORLEANS
29 Consultations
0 Téléchargements

Partager

Gmail Facebook X LinkedIn More