Toward constraint of ionization-potential depression models in a convergent geometry
HIGH ENERGY DENSITY PHYSICS(2024)
摘要
We demonstrate the value of inner-shell X-ray absorption spectroscopy for dense-plasma atomic physics and explore the coupling between constraint of the thermodynamic state and constraint of ionization-potential depression models. Synthetic K-shell absorption spectra are generated along a radius from a point-like core and analyzed using different ionization-potential depression models. Within this synthetic analysis framework, we identify plasma conditions (T-e = 400 eV, rho = 40 g/cm(3)) accessible by spherical implosions where K-shell absorption spectra discriminate between models if the material temperature is measured to a precision of 20%. The analysis is extensible to a finite-sized core and can be used to guide future studies of ionization-potential depression, informing material and radiative properties of matter in fusion plasmas and stellar interiors.
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关键词
Continuum lowering,Opacity,X-ray absorption spectroscopy,Ionization balance,Bayesian inference
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