Speaker
Description
Opacity, which describes the extent to which the radiation is absorbed and scattered in the material, is essential in understanding the fundamental physical properties of high-energy-density(HED) and astrophysical plasmas. FLYCHK, a collisional-radiative code, has been used to calculate the opacities of HED plasmas under a wide range of conditions due to the simplicity and availability of the code[1,2]. However, it has been confirmed that the FLYCHK opacity has limitations in strongly coupled plasmas due to the problem of free-free opacity formalism[3,4]. In this research, we improve the free-free opacity calculation model of FLYCHK and generate opacities of various materials(Al, H, Au). The FLYCHK opacities are in good agreement with those obtained by the Los Alamos opacity code ATOMIC[5].
This work was supported by the NRF of Korea (No. NRF-2019R1A2C2002864) and the Defense Research Laboratory Program of the Defense Acquisition Program Administration and the Agency for Defense Development of the Republic of Korea.
References
[1] Chung, H-K., et al., High Energy Density Physics, 1, 3-12 (2005).
[2] Chung, H-K., M. H. Chen, and R. W. Lee., High Energy Density Physics, 3, 57-64 (2007).
[3] Cho, M. S., et al., Journal of Quantitative Spectroscopy and Radiative Transfer, 257, 107369 (2020).
[4] Cho, M. S., et al., Journal of the Korean Physical Society, 78, 1072-1083 (2021)
[5] Colgan, J., et al., The Astrophysical Journal 817, 116 (2016): 116.
| Presenting Author | Jang Hyeob Sohn |
|---|---|
| Presenting Author Email Address | jhsohn@gm.gist.ac.kr |
| Presenting Author Affiliation | Department of Physics and Photon Science, Gwangju Institute of Science and Technology (GIST) |
| Country | South Korea |
| Presenting Author Gender | Male |
