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Updated: Aug 5, 2026

Applying X-ray Imaging Crystal Spectroscopy for Use as a High Temperature Plasma Diagnostic
Published on: August 25, 2016
Birefringence effect as a tool for astrophysical plasma study
G D Fleishman1, Q J Fu, M Wang
1Purple Mountain Observatory, National Astronomical Observatories, Nanjing 210008, People's Republic of China.
Abstract:
Group delay between two magnetoionic modes is discovered and spectrally confirmed ( deltat(g) proportional, variantf(-3)) for the first time for quasiperiodic narrow band millisecond solar radio pulsations. Analysis of cross delays and autodelays proves that both X and O modes originate at the same source, so the radiation is weakly polarized originally. This finding allows one to specify the emission mechanism of the pulsations to be a nonlinear plasma mechanism operating at the second harmonics. Physical parameters of the solar corona are determined by the use of the theory of the nonlinear plasma mechanism; they agree well with independent observations of solar millisecond pulsations.
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