Toward constraint of ionization-potential depression models in a convergent geometry

Bishel, D. T.; Nilson, P. M.; Chin, D. A.; Ruby, J. J.; Smith, E.; Hu, S. X.; Epstein, R.; Golovkin, I. E.; Rygg, J. R.; Collins, G. W.

doi:10.1016/j.hedp.2024.101076

DOE OSTI · 2320253

Toward constraint of ionization-potential depression models in a convergent geometry

Bishel, D. T.·Nilson, P. M.·Chin, D. A.·Ruby, J. J.·Smith, E.·Hu, S. X.·Epstein, R.·Golovkin, I. E.·Rygg, J. R.·Collins, G. W.

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Abstract

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, ρ = 40g/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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Bishel, D. T., Nilson, P. M., Chin, D. A., Ruby, J. J., Smith, E., Hu, S. X., Epstein, R., Golovkin, I. E., Rygg, J. R., Collins, G. W.. 2024-01-03. Toward constraint of ionization-potential depression models in a convergent geometry. https://doi.org/10.1016/j.hedp.2024.101076

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