Characterization of detachment inferred from the Balmer line ratios in JET-ILW low-confinement mode plasmas

Rikala, Vesa-Pekka; Groth, M.; Meigs, A. G.; Reiter, D.; Lomanowski, B.; Shaw, A.; Aleiferis, S.; Corrigan, G.; Carvalho, I. S.; Harting, D.; Horsten, N.; Jepu, I.; Karhunen, J.; Lawson, K. D.; Lowry, C.; Menmuir, S.; Thomas, B.; Borodin, D.; Douai, D.; Huber, A.

doi:10.1016/j.nme.2025.101893

Characterization of detachment inferred from the Balmer line ratios in JET-ILW low-confinement mode plasmas

Journal Article · Mon Feb 10 04:00:00 EST 2025 · Nuclear Materials and Energy

DOI:https://doi.org/10.1016/j.nme.2025.101893· OSTI ID:2586836

^[1]; ^[1]; ^[2]; ^[3]; ^[4]; Shaw, A. ^[2]; ^[2]; Corrigan, G. ^[2]; ^[5]; ^[6]; ^[7]; ^[2]; Karhunen, J. ^[8]; Lawson, K. D. ^[2]; Lowry, C. ^[2]; ^[2]; ^[2]; ^[9]; ^[10]; Huber, A. ^[6]

Aalto Univ. (Finland)
UK Atomic Energy Authority (UKAEA), Culham (United Kingdom)
Heinrich Heine Univ. (Germany)
UK Atomic Energy Authority (UKAEA), Culham (United Kingdom); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
UK Atomic Energy Authority (UKAEA), Culham (United Kingdom); ITER Organization, St. Paul Lez Durance (France)
UK Atomic Energy Authority (UKAEA), Culham (United Kingdom); Forschungszentrum Juelich (Germany)
Aalto Univ. (Finland); Katholieke Univ. Leuven (Belgium)
Aalto Univ. (Finland); Univ. of Helsinki (Finland); UK Atomic Energy Authority (UKAEA), Culham (United Kingdom)
Forschungszentrum Juelich (Germany)
CEA, IRFM (France)

Spectroscopic measurements of the hydrogenic Balmer-α and Balmer-γ line emission in JET-ILW low-confinement mode (L-mode) deuterium plasmas are used to assess the onset of volume recombination in the low-field side (LFS) divertor. The evolution of the EDGE2D-EIRENE predicted Balmer-γ to Balmer-α emission ratio from low-recycling to detached conditions is in qualitative agreement with the measured ratio. In low-recycling conditions the EDGE2D-EIRENE predicted line-emission is within 30% of measured emission, in high-recycling within 20%t, and in detached conditions lower by a factor of 2.5.

View Accepted Manuscript (DOE)

Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

Contributing Organization:: JET Contributors

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 2586836

Journal Information:: Nuclear Materials and Energy, Journal Name: Nuclear Materials and Energy Vol. 42; ISSN 2352-1791

Publisher:: Elsevier BVCopyright Statement

Country of Publication:: United States

Language:: English

References (19)

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