Absorption tomography of laser induced plasmas with a large aperture

Details Absorption tomography of laser induced plasmas with a large aperture Absorption tomography of laser induced plasmas with a large aperture

2010-08-03

arxiv.org/abs/1008.0503v1

Physics

Plasma Physics

9 pages, 3 figures

Scientific paper

An emission tomography of laser-induced plasmas employed in the laser induced breakdown spectroscopy (LIBS) requires long signal integration times during which the plasma cannot be considered stationary. To reduce the integration time, it is proposed to measure a plasma absorption in parallel rays with an aperture that collects light coming from large fractions of the plasma plume at each aperture position. The needed spatial resolution is achieved by a special numerical data processing. Another advantage of the proposed procedure is that inexpensive linear CCD or non-discrete (PMT, photodiode) detectors can be used instead of costly 2-dimensional detectors.

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