Visible core spectroscopy at <b>Wendelstein 7-X</b>
This paper presents an overview of recent hardware extensions and data analysis developments to the Wendelstein 7-X visible core spectroscopy systems. These include upgrades to prepare the in-vessel components for long-pulse operation, nine additional spectrometers, a new line of sight array for passive spectroscopy, and a coherence imaging charge exchange spectroscopy diagnostic. Progress in data analysis includes ion temperatures and densities from multiple impurity species, a statistical comparison with x-ray crystal spectrometer measurements, neutral density measurements from thermal passive Balmer-alpha emission, and a Bayesian analysis of active hydrogen emission, which is able to infer electron density and main ion temperature profiles.
Authors
- S. Bannmann (ORCID: https://orcid.org/0000-0003-0772-9278)
- A. Langenberg (ORCID: https://orcid.org/0000-0002-2107-5488)
- B. Geiger (ORCID: https://orcid.org/0000-0001-8706-1874)
- P. Zs. Pölöskei (ORCID: https://orcid.org/0000-0001-7781-5599)
- N. Pablant (ORCID: https://orcid.org/0000-0001-6617-8459)
- Colin Swee (ORCID: https://orcid.org/0000-0003-2365-6777)
- O. Ford (ORCID: https://orcid.org/0000-0002-5646-4758)
- E. Viezzer (ORCID: https://orcid.org/0000-0001-6419-6848)
- T. Gonda (ORCID: https://orcid.org/0009-0002-8601-6531)
- M. Yoshinuma (ORCID: https://orcid.org/0000-0002-5113-9710)
- Thilo Romba (ORCID: https://orcid.org/0000-0002-2727-9385)
- A. Alonso (ORCID: https://orcid.org/0000-0001-6863-8578)
- K. Ida (ORCID: https://orcid.org/0000-0002-0585-4561)
- R. Lopez-Cansino (ORCID: https://orcid.org/0009-0003-5806-2992)
- V. Perseo (ORCID: https://orcid.org/0000-0001-8473-9002)
- M. Zanini (ORCID: https://orcid.org/0000-0002-8717-1106)
- J. de la Riva Villén (ORCID: https://orcid.org/0009-0006-7529-8472)
Institutions
- Universidad Complutense de Madrid (ES)
- University of Wisconsin–Madison (US)
- Princeton Plasma Physics Laboratory (US)
- National Institute for Fusion Science (JP)
- Max Planck Institute for Plasma Physics - Greifswald (DE)
- Universidad de Sevilla (ES)
- Auburn University (US)
Publication Details
- Journal
- Review of Scientific Instruments
- Published
- 2024-08-01
- DOI
- https://doi.org/10.1063/5.0219469
- Citations
- 5
- Primary Topic
- Magnetic confinement fusion research
- Type
- article
- Field-Weighted Citation Impact
- 3.30
Funders
- EUROfusion
- European Commission
- Euratom Research and Training Programme