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Analysis on the FLYCHK opacity of X-pinch wire materials

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Abstract

The plasma opacities of the widely used X-pinch target materials (Cu, Mo, W) are calculated over a wide temperature and density range (T = 10–3–102 keV, ρ = 1016–1024 cm−3) by using the collisional radiative code FLYCHK. Including the scattering effect, the FLYCHK opacity of the mid-Z element copper is in good agreement with the Los Alamos opacity code ATOMIC in the broad T–ρ range corresponding to typical X-pinch plasma conditions. In a strongly coupled region, a few corrections, such as the degeneracy effect for the free–free opacity, may be required to improve accuracies. The absence of a Δn = 0 transition and the simple scattering opacity formula in FLYCHK also cause the characteristics of the FLYCHK opacity data. The plasma opacities of the high-Z elements molybdenum and tungsten are also calculated. These results can be used as basic inputs for various radiative hydrodynamic simulations not only for X-pinch plasmas but for different types of high-energy–density plasma research.

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Acknowledgements

This work was supported by the Defense Research Laboratory Program of the Defense Acquisition Program Administration and the Agency for Defense Development of the Republic of Korea.

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Authors and Affiliations

  1. Department of Physics and Photon Science, Gwangju Institute of Science and Technology (GIST), Gwangju, 61005, South Korea

    M. S. Cho, J. H. Sohn & B. I. Cho

  2. National Fusion Research Institute, Daejeon, 34133, South Korea

    H.-K. Chung

  3. Center for Relativistic Laser Science, Institute for Basic Science (IBS), Gwangju, 61005, South Korea

    B. I. Cho

  4. Department of Physics, Chung-Ang University, Seoul, 06974, South Korea

    S. J. Hahn

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  1. M. S. Cho
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Correspondence to B. I. Cho or S. J. Hahn.

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Cho, M.S., Sohn, J.H., Chung, HK. et al. Analysis on the FLYCHK opacity of X-pinch wire materials. J. Korean Phys. Soc. 78, 1072–1083 (2021). https://doi.org/10.1007/s40042-021-00173-4

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  • DOI: https://doi.org/10.1007/s40042-021-00173-4

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