Power spectral fractalysis: a surrogate method for laser-induced plasma temperature analysis
Department of Optoelectronics, University of Kerala, 695581, Trivandrum, Kerala, India
Accepted: 30 October 2021
Published online: 16 November 2021
The paper deciphers the potential of fractal analysis in unveiling the complex plasma dynamics. The light from copper plasma is focused on the slit of a spectrometer, and the spectral variations across the slit are analysed. The plasma temperature (T) computed from the spectrum at various spatial points of the slit also exhibits a variation similar to that of power spectral fractal dimension (. The study reveals a strong correlation between T and , reflecting the complex dynamics and the compositional anisotropy in plasma. At the plasma core, where the temperature is the highest, and the matter is in the ionised state, the is high, and the lower temperature regions show a lower value. The fractalysis helps analyse plasma temperature without knowing transition probability and the energy of the upper-level corresponding to each value of wavelength. Thus, the power spectral fractalysis can be considered a surrogate method for understanding the plasma temperature and the particle dynamics involved.
© The Author(s), under exclusive licence to EDP Sciences, Springer-Verlag GmbH Germany, part of Springer Nature 2021