Volume 84, Number 4, November 2008
Article Number 43002
Number of page(s) 4
Section Atomic, Molecular and Optical Physics
Published online 10 November 2008
EPL, 84 (2008) 43002
DOI: 10.1209/0295-5075/84/43002

Narrowing of Doppler spectral line shapes by correlated ion and electron temperature fluctuations

J. Rosato1, H. Capes1, Y. Marandet1, F. B. Rosmej2, 3, R. Stamm1, L. Godbert-Mouret1 and M. Koubiti1

1   PIIM, UMR 6633 CNRS/Université de Provence, Centre de St-Jérôme - Case 232, 13397 Marseille Cedex 20, France, EU
2   Université Pierre et Marie Curie, UMR 7605, LULI - Case 128, 4 Place Jussieu, 75252 Paris, France, EU
3   Ecole Polytechnique, LULI, “Physique Atomique dans les Plasmas Denses” PAPD - 91128 Palaiseau Cedex, France, EU

received 20 August 2008; accepted in final form 10 October 2008; published November 2008
published online 10 November 2008

The influence of low-frequency temperature fluctuations on Doppler line shapes is investigated. It is shown that the line profile can be strongly narrowed if the fluctuations of ion and electron temperatures are correlated. This result shows that the widely used model retaining only velocity fluctuations in the analysis of Doppler lines might lead to misleading conclusions about turbulence level.

32.70.Jz - Line shapes, widths, and shifts.
52.35.Ra - Plasma turbulence.

© EPLA 2008