Plasma and Fusion Research
Volume 20, 2401012 (2025)
Regular Articles
- 1)
- National Institute for Fusion Science, Toki 509-5292, Japan
- 2)
- Graduate University for Advanced Studies, SOKENDAI, Toki 509-5292, Japan
- 3)
- Naka Institute for Fusion Science and Technology, National Institutes for Quantum Science and Technology, Naka 311-0193, Japan
- 4)
- Department of Quantum Science and Energy Engineering, Tohoku University, Sendai 980-8579, Japan
Abstract
The Stark broadening of a Be II line (1s23d 2D – 1s24f 2F, 467.339 nm) under a magnetic field is evaluated with the divertor plasma of ITER in mind. The electron and ion perturbers are treated in the impact and static approximations, respectively. The perturbation term due to the magnetic field is included in the static approximation. The results show that the Stark broadening comes to be significantly large when the density is higher than 1021 m−3, and the ion temperature would be overestimated if the Stark broadening is not taken into account.
Keywords
ITER divertor, ion temperature measurement, beryllium, impurity line, Stark broadening, Zeeman effect
Full Text
References
- [1] https://www.iter.org/
- [2] E. Kaveeva et al., Nucl. Mater. Energy 35, 101424 (2023).
- [3] V. Kotov et al., Juel-Report, 4257 (2007).
- [4] D. Reiter et al., Fusion Sci. Technol. 47, 172 (2005).
- [5] R.A. Pitts et al., Nucl. Mater. Energy 20, 100696 (2019).
- [6] N. Sadeghi and M. Goto, J. Quant. Spectrosc. Radiat. Transf. 245, 106875 (2020).
- [7] H.R. Griem, Spectral line broadening by plasmas, Academic Press, New York (1974).
- [8] C.F. Hooper, Phys. Rev. 169, 193 (1968).
- [9] T. Fujimoto and A. Iwamae, Plasma Polarization Spectroscopy, Springer, Berlin (2007).
- [10] J.J. Sakurai, Modern Quantum Mechanics, Addison-Wesley, Redwood City (1985).
- [11] P.H. Heckmann and E. Träbert, Introduction to the Spectroscopy of Atoms, North-Holland, Amsterdam (1989).