Advances in X-Ray Spectroscopy of Laser Plasmas by Eugene Oks

Author:Eugene Oks
Language: eng
Format: epub, mobi, pdf
ISBN: 9780750333757
Publisher: IOP Publishing
Published: 2020-07-03T00:00:00+00:00

Consequently, it is possible to deduce the amplitude E0 of the Langmuir wave by measuring the experimental half-width of L-dips.

Before presenting the analysis of the experimental Si XIV spectral lines, the authors of paper [1] noted the following. The laser frequency ω corresponds to the wavelength λ of approximately 1054 nm. At lower, non-relativistic laser intensities, the critical electron density Nc is determined from the equation ω = ωpe, where , would be 1.0 × 1021 cm−3. However, at the laser intensities ~1021 W cm−2, i.e. those corresponding to the experiment [24], due to relativistic effects, the ‘relativistic’ critical electron density Ncr becomes higher than Nc—see, e.g. papers [35–37]. For the linearly-polarized laser radiation, it becomes (according to paper [38])

(4.3)

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