Laser scattering on atmospheric plasmas

A.F.H. Gessel, van, E.I. Iordanova, J.M. Palomares, E.A.D. Carbone, J.J.A.M. Mullen, van der

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Abstract

We show results of the characterization of an atmospheric argon plasma with the use of laser scattering. The plasma source that is used is a surfatron plasma with argon. We looked at Rayleigh scattering to de-termine the gas temperature, and at Thomson scattering to determine the electron temperature and den-sity. The Thomson scattering efficiency is very low (~10-15) and therefore care must be taken to filter un-wanted stray light. For this we used a triple grating spectrometer. The triple grating spectrometer has a mask to filter out the central wavelength, which consists of stray light and the Rayleigh signal. With the mask in place we can measure Thomson scattering and Raman scattering, the latter of which is used to calibrate the Thomson signal. With the mask removed we can measure Rayleigh scattering. Several pro-files of the gas temperature, electron temperature and electron density are presented.
Original languageEnglish
Title of host publicationProceedings of the 29th International Conference on Phenomena in Ionized Gases (ICPIG 2009), 12-17 July 2009, Cancún, México
EditorsJ. Schmidt, M. Simek, S. Pekarek
PagesPA6-15-1/3
Publication statusPublished - 2009

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