Emission of high rovibrational hydrogen molecules under detached plasma conditions by recycling on the tungsten wall
Abstract It is well known that the rate coefficient of molecular-assisted recombination (MAR) varies by several orders of magnitude depending on the rovibrational states of the hydrogen molecules. A molecular dynamics simulation is performed to estimate the rovibrational states of recycled hydrogen molecules at the divertor in the JA-DEMO reactor under detached plasma conditions. The simulation results reveal that molecules in high rovibrational states are released even with low incident energy, which will be the dominant condition under detached plasma conditions. Molecules generated in this way can strongly affect the formation of the detached plasma via a molecular assisted-process such as MAR.
Authors
- Takeshi Doi (ORCID: https://orcid.org/0000-0002-7342-9145)
- Y. Homma (ORCID: https://orcid.org/0000-0002-9872-9697)
- K. Hoshino (ORCID: https://orcid.org/0000-0001-5672-9640)
- S. Yamoto (ORCID: https://orcid.org/0000-0002-7802-4382)
- M. Kobayashi (ORCID: https://orcid.org/0000-0002-0990-7093)
- Y. Kojima (ORCID: https://orcid.org/0000-0002-8805-6337)
- K. Sawada (ORCID: https://orcid.org/0000-0002-9469-6912)
- Masahiro Hasuo (ORCID: https://orcid.org/0000-0001-8441-2640)
- Hiroaki Nakamura (ORCID: https://orcid.org/0000-0002-0593-8810)
- Seiki Saitô
Institutions
- Yamagata University (JP)
- Shinshu University (JP)
- Keio University (JP)
- Kyoto University (JP)
- National Institute for Fusion Science (JP)
- National Institutes for Quantum Science and Technology (JP)
- Nagoya University (JP)
Publication Details
- Journal
- Nuclear Fusion
- Published
- 2024-10-03
- DOI
- https://doi.org/10.1088/1741-4326/ad82f8
- Citations
- 3
- Primary Topic
- Laser-induced spectroscopy and plasma
- Type
- article
- Field-Weighted Citation Impact
- 0.81