Nuclear Materials and Energy (Mar 2025)
Characterization of detachment inferred from the Balmer line ratios in JET-ILW low-confinement mode plasmas
- Vesa-Pekka Rikala,
- M. Groth,
- A.G. Meigs,
- D. Reiter,
- B. Lomanowski,
- A. Shaw,
- S. Aleiferis,
- G. Corrigan,
- I.S. Carvalho,
- D. Harting,
- N. Horsten,
- I. Jepu,
- J. Karhunen,
- K.D. Lawson,
- C. Lowry,
- S. Menmuir,
- B. Thomas,
- D. Borodin,
- D. Douai,
- A. Huber
Affiliations
- Vesa-Pekka Rikala
- Aalto University, Department of Applied Physics, Espoo, Finland; Corresponding author.
- M. Groth
- Aalto University, Department of Applied Physics, Espoo, Finland
- A.G. Meigs
- UKAEA, Culham Science Centre, Abingdon, UK
- D. Reiter
- Heinrich Heine University Düsseldorf, Düsseldorf, Germany
- B. Lomanowski
- UKAEA, Culham Science Centre, Abingdon, UK; Oak Ridge National Laboratory, USA
- A. Shaw
- UKAEA, Culham Science Centre, Abingdon, UK
- S. Aleiferis
- UKAEA, Culham Science Centre, Abingdon, UK
- G. Corrigan
- UKAEA, Culham Science Centre, Abingdon, UK
- I.S. Carvalho
- UKAEA, Culham Science Centre, Abingdon, UK; ITER Organization, Route de Vinon-sur-Verdon, CS 90 046, 13067 St. Paul Lez Durance Cedex, France
- D. Harting
- UKAEA, Culham Science Centre, Abingdon, UK; Forschungszentrum Jülich GmbH, Institut für Energie- und Klimaforschung - Plasmaphysik, Partner of the Trilateral Euregio Cluster (TEC), Jülich, Germany
- N. Horsten
- Aalto University, Department of Applied Physics, Espoo, Finland; KU Leuven, Leuven, Belgium
- I. Jepu
- UKAEA, Culham Science Centre, Abingdon, UK
- J. Karhunen
- Aalto University, Department of Applied Physics, Espoo, Finland; University of Helsinki, Helsinki, Finland; UKAEA, Culham Science Centre, Abingdon, UK
- K.D. Lawson
- UKAEA, Culham Science Centre, Abingdon, UK
- C. Lowry
- UKAEA, Culham Science Centre, Abingdon, UK
- S. Menmuir
- UKAEA, Culham Science Centre, Abingdon, UK
- B. Thomas
- UKAEA, Culham Science Centre, Abingdon, UK
- D. Borodin
- Forschungszentrum Jülich GmbH, Institut für Energie- und Klimaforschung - Plasmaphysik, Partner of the Trilateral Euregio Cluster (TEC), Jülich, Germany
- D. Douai
- CEA IFRM Cadarache, France
- A. Huber
- UKAEA, Culham Science Centre, Abingdon, UK; Forschungszentrum Jülich GmbH, Institut für Energie- und Klimaforschung - Plasmaphysik, Partner of the Trilateral Euregio Cluster (TEC), Jülich, Germany
- DOI
- https://doi.org/10.1016/j.nme.2025.101893
- Journal volume & issue
-
Vol. 42
p. 101893
Abstract
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.
Keywords
