Plasma and Fusion Research

Volume 21, 2403022 (2026)

Regular Articles

Simulation Study of Neutral Tungsten Emissions for Fusion Applications
Ritu DEY1), Ayushi AGRAWAL2), Reetesh KUMAR GANGWAR1), Deepti SHARMA3), Rajesh SRIVASTAVA2), Malay B. CHOWDHURI3), Joydeep GHOSH3,4)
1)
Department of Physics, Indian Institute of Technology Tirupati, Yerpedu 517619, India
2)
Department of Physics, Indian Institute of Technology Roorkee, Roorkee 247667, India
3)
Institute for Plasma Research, Gandhinagar 382428, India
4)
Homi Bhabha National Institute, Training School Complex, Anushakti Nagar, Mumbai 400094, India
(Received 29 August 2025 / Accepted 25 January 2026 / Published 31 March 2026)

Abstract

The article reports electron-impact excitation cross-sections and rate coefficients for neutral tungsten for three transitions (400.87, 429.46, and 430.21 nm) using the relativistic distorted wave approach within the flexible atomic code. Some of these lines are also observed in tokamak plasma. Cross-sections are computed for incident electron energy up to 30 keV. The energy levels in flexible atomic code were corrected to match the NIST database. The electron impact excitation rate coefficients are also provided.

Keywords

tungsten, FAC, cross-section, rate-coefficient

DOI: 10.1585/pfr.21.2403022

Full Text

PDF format (841Kbytes) PDF Download

References

  • [1] R.A. Pitts et al., Nucl. Mater. Energy 20, 100696 (2019).
  • [2] C. Sang et al., Nucl. Fusion 61, 066004 (2021).
  • [3] Y. Wu et al., Nucl. Mater. Energy 33, 101297 (2022).
  • [4] J. Bucalossi et al., Nucl. Fusion 64, 112022 (2024).
  • [5] A. Thoma et al., Plasma Phys. Control. Fusion 39, 1487 (1997).
  • [6] G.F. Matthews et al., Phys. Scr. T128, 137 (2007).
  • [7] I. Beigman et al., Plasma Phys. Control. Fusion 49, 1833 (2007).
  • [8] Priti et al., Atoms 3, 53 (2015).
  • [9] P. Quinet et al., J. Phys. B, At. Mol. Opt. Phys. 44, 1883 (2011).
  • [10] J.P. Desclaux, Comput. Phys. Commun. 9, 31 (1975).
  • [11] Y.-K. Kim and M.E. Rudd, Phys. Rev. A 50, 3954 (1994).
  • [12] R.D. Cowan, The Theory of Atomic Structure and Spectra (University of California Press, Berkeley, CA, USA, 1981).
  • [13] A. Kramida, Atoms 7, 64 (2019).
  • [14] M.F. Gu, Can. J. Phys. 86, 675 (2008).
  • [15] C. Ballance, Dirac atomic R-matrix code (2005).
  • [16] K. Dyall et al., Comput. Phys. Commun. 55, 425 (1989).
  • [17] P. Indelicato, MDFGME, a multiconfiguration Dirac-Fock and general matrix elements program (2024). https://www.lkb.upmc.fr/metrologysimplesystems/mdfgme-a-general-purposemuticonnfiguration-dirac-foc-program/
  • [18] D.-H. Kwon and P. Indelicato, Eur. Phys. J. D. 78, 86 (2024).
  • [19] B. Hegde et al., private communication (2025).
  • [20] D. Wünderlich et al., J. Quant. Spectrosc. Radiat. Transfer 149, 360 (2014).
  • [21] Priti et al., J. Quant. Spectrosc. Radiat. Transfer 187, 426 (2017).
  • [22] A. Kramida et al., NIST Database (ver. 5.12) (2024). https://physics.nist.gov/asd.
  • [23] R.T. Smyth et al., Phys. Rev. A 97, 052705 (2018).