Academic Journal
Reconstruction of the fast-ion deuterium distribution in a tritium-rich plasma in the JET DTE2 campaign
| Title: | Reconstruction of the fast-ion deuterium distribution in a tritium-rich plasma in the JET DTE2 campaign |
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| Authors: | H. Järleblad, B.C.G. Reman, Y. Dong, M. Nocente, J. Eriksson, A. Valentini, M. Rud, A. Dal Molin, J. Garcia, Ye.O. Kazakov, D. Keeling, D. King, E.A. Lerche, R. Lorenzini, C. Maggi, M. Maslov, D. Moseev, D. Rigamonti, Bo S. Schmidt, Ž. Štancar, M. Tardocchi, M. Salewski, JET Contributors, the EUROfusion Tokamak Exploitation Team |
| Source: | Nuclear Fusion, Vol 65, Iss 1, p 016060 (2024) |
| Publisher Information: | IOP Publishing, 2024. |
| Publication Year: | 2024 |
| Collection: | LCC:Nuclear and particle physics. Atomic energy. Radioactivity |
| Subject Terms: | DT, fast-ion distribution, tomographic reconstruction, JET, slowing-down regularization, neutron diagnostics, Nuclear and particle physics. Atomic energy. Radioactivity, QC770-798 |
| More Details: | An important step on the way to future fusion power plants was the 2021 deuterium–tritium experimental campaign (DTE2) at the Joint European Torus (JET), in which crucial DT physics was investigated. In this study, we have reconstructed the fast-ion deuterium distribution function in JET discharge 99971 which broke the former fusion energy record. It is the first time that the fast-ion distribution has been reconstructed from experimental data in a DT discharge. The reconstruction shows that the fast-ion deuterium distribution is anisotropic, with a bias towards co-going ions ( p > 0). The fast-ion deuterium distribution likely peaks in energy ( E ) at around $E\sim 60$ –70 keV and has a marginal high-energy tail ( $E\gtrsim 180$ keV). Furthermore, an orbit analysis shows that the fast-ion distribution is composed of mostly co-passing orbits ( $50 \%$ ), trapped orbits ( $21 \%$ ) and counter-passing orbits ( $27 \%$ ), as well as a small population of potato orbits ( $1.7 \%$ ) and counter-stagnation orbits ( $0.3 \%$ ). The orbit-type constituents of the neutron measurements are distributed in similar fractions. |
| Document Type: | article |
| File Description: | electronic resource |
| Language: | English |
| ISSN: | 1741-4326 0029-5515 |
| Relation: | https://doaj.org/toc/0029-5515 |
| DOI: | 10.1088/1741-4326/ad9b39 |
| Access URL: | https://doaj.org/article/764a4da7be8e40c497ecb5be835152dc |
| Accession Number: | edsdoj.764a4da7be8e40c497ecb5be835152dc |
| Database: | Directory of Open Access Journals |
| ISSN: | 17414326 00295515 |
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| DOI: | 10.1088/1741-4326/ad9b39 |
| Published in: | Nuclear Fusion |
| Language: | English |