First experiments on RF plasma production at relatively low magnetic fields in the LHD
Abstract The results of the first experimental series to produce a plasma using the radio frequency discharge (RF) above the ion cyclotron frequency at relatively low magnetic fields (0.5–0.6 T) in the Large Helical Device (LHD) are presented 1.43 MW of RF power produced target plasma with density up to 6 × 10 18 m −3 to deuterium. Tangential NBI application into such a plasma increases plasma parameters. Electron temperatures up to ≈0.9 keV and densities up to ≈2.4 × 10 19 m −3 had been achieved, and the maximum value of < β dia > was 2.6%. These experiments open possibilities for new regimes of LHD operation which are also interested to W7-X.
Authors
- T. Seki (ORCID: https://orcid.org/0000-0003-2718-4930)
- S. Masuzaki
- Hiroshi Kasahara (ORCID: https://orcid.org/0000-0001-6075-1146)
- Yu.V. Kovtun
- S. Brezinsek (ORCID: https://orcid.org/0000-0002-7213-3326)
- R. Seki (ORCID: https://orcid.org/0000-0002-5364-805X)
- S. Kamio
- A. Dinklage
- Kenji Saito (ORCID: https://orcid.org/0000-0001-8972-6534)
- V.Е. Moiseenko
Institutions
- Uppsala University (SE)
- Forschungszentrum Jülich (DE)
- University of California, Irvine (US)
- Kharkiv Institute of Physics and Technology (UA)
- National Institute for Fusion Science (JP)
- Max Planck Institute for Plasma Physics - Greifswald (DE)
Publication Details
- Journal
- Nuclear Fusion
- Published
- 2024-08-19
- DOI
- https://doi.org/10.1088/1741-4326/ad70cc
- Citations
- 2
- Primary Topic
- Magnetic confinement fusion research
- Type
- article
- Field-Weighted Citation Impact
- 1.32
Funders
- National Research Foundation of Ukraine
- EUROfusion
- European Commission
- National Research Foundation
- Euratom Research and Training Programme
- H2020 Euratom