Preparatory study of feasibility for a vertical viewing electron cyclotron emission diagnostic for the JT-60SA tokamak
A preparatory study is underway to investigate the feasibility study of high-energetic, non-thermal electron distribution function measurements using a vertical-viewing electron cyclotron emission (ECE) diagnostic on JT-60SA. The system is designed to detect broad ECE spectra (70-260 GHz) due to the second, third, and fourth harmonics using a focusing optics system with four quasi-optical mirrors in the upper port of JT-60SA. A Gaussian beam optics design is performed in vacuum, and ray tracing calculations are performed in plasma using the TRAVIS code to investigate density characteristics. A ceramic viewing dump is also designed to reduce the effects of multiple reflections from the opposing vacuum vessel surface.
Authors
- Shigeyasu Nakagawa
- F. Kin (ORCID: https://orcid.org/0000-0001-6248-8695)
- Ryota Imazawa (ORCID: https://orcid.org/0000-0002-7210-279X)
- Shunmei Chiba
- M. Yoshida (ORCID: https://orcid.org/0000-0002-2899-1323)
- S. Inagaki (ORCID: https://orcid.org/0000-0002-4808-857X)
- A. Fujisawa (ORCID: https://orcid.org/0000-0003-1722-7431)
- T. Tokuzawa
- T. Nasu (ORCID: https://orcid.org/0000-0002-9172-7381)
- K. Ida (ORCID: https://orcid.org/0000-0002-0585-4561)
- N. Suzuki (ORCID: https://orcid.org/0009-0001-2525-3560)
Institutions
- Kyushu University (JP)
- National Institutes of Natural Sciences (JP)
- The Graduate University for Advanced Studies, SOKENDAI (JP)
- Kyoto University (JP)
- National Institute for Fusion Science (JP)
- National Institutes for Quantum Science and Technology (JP)
Publication Details
- Journal
- Review of Scientific Instruments
- Published
- 2024-08-01
- DOI
- https://doi.org/10.1063/5.0218359
- Citations
- 2
- Primary Topic
- Magnetic confinement fusion research
- Type
- article
- Field-Weighted Citation Impact
- 1.32
Funders
- Japan Society for the Promotion of Science