First measurements of velocity-space resolved intra-ELM fast-ion losses on the TCV tokamak
Edge Localised Modes (ELMs) induced fast-ion losses have been characterised in the energy, E, and pitch, λ = v∥/v, space using a unique Fast Ion Loss Detector (FILD) on the tokamak à configuration variable. The FILD is equipped with a 128 Avalanche Photo Diodes (APDs) camera measuring scintillator e...
| Autores: | ; ; ; ; ; ; ; ; ; ; ; ; |
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| Tipo de documento: | Artigo |
| Estado: | Published version |
| Data de publicação: | 2025 |
| País: | España |
| Recursos: | Universidad de Sevilla (US) |
| Repositório: | idUS. Depósito de Investigación de la Universidad de Sevilla |
| OAI Identifier: | oai:dnet:idus________::26ca94332fbed6d5777835182e8846ca |
| Acesso em linha: | https://hdl.handle.net/11441/186015 https://doi.org/10.1088/1741-4326/adf95b |
| Nível de acesso: | Acesso aberto |
| Palavra-chave: | Fast particles FILD ELMs Microsecond velocity-space Acceleration |
| _version_ | 1878733207121166336 |
|---|---|
| author | Poley-Sanjuán, J. |
| author2 | Jansen van Vuuren, A. Galdón Quiroga, Joaquín Mazzi, S. Podestà, M. Dreval, M.B. Duval, B. P. Fasoli, A. Karpushov, A. N. Labit, B. Kumar, U. EUROfusion Tokamak Exploitation Team TCV Team |
| author2_role | author author author author author author author author author author author author |
| author_browse | Dreval, M.B. Duval, B. P. EUROfusion Tokamak Exploitation Team Fasoli, A. Galdón Quiroga, Joaquín Jansen van Vuuren, A. Karpushov, A. N. Kumar, U. Labit, B. Mazzi, S. Podestà, M. Poley-Sanjuán, J. TCV Team |
| author_facet | Poley-Sanjuán, J. Jansen van Vuuren, A. Galdón Quiroga, Joaquín Mazzi, S. Podestà, M. Dreval, M.B. Duval, B. P. Fasoli, A. Karpushov, A. N. Labit, B. Kumar, U. EUROfusion Tokamak Exploitation Team TCV Team |
| author_role | author |
| collection | idUS. Depósito de Investigación de la Universidad de Sevilla |
| description | Edge Localised Modes (ELMs) induced fast-ion losses have been characterised in the energy, E, and pitch, λ = v∥/v, space using a unique Fast Ion Loss Detector (FILD) on the tokamak à configuration variable. The FILD is equipped with a 128 Avalanche Photo Diodes (APDs) camera measuring scintillator emission with a 1 MHz bandwidth. The well-defined view lines of the APDs allow for obtaining velocity space information from the emission pattern with unprecedented temporal resolution. Making use of the enhanced FILD capabilities, ELM-induced fast-ion losses were investigated in the ITER Baseline Scenario, mimicking its shape and normalised plasma parameters. Significant fast-ion losses were observed, notably before and during the ELM crashes induced by the presence of a 2/1 MHD instability localised at the plasma’s normalised radius, ρ ∼ 0.7. The fast-ion interaction with the plasma instability is concluded to be unconnected to the presence of the ELMs. During the ELM crashes, there is an observed spread in both the fast-ion pitch and energy that reaches higher values (∼70 keV) than expected from the pre-ELM fast-ion population, generated by Neutral Beam Injection at ∼27 keV. This implies a fast-ion acceleration during the ELM’s crash. Full orbit neoclassical simulations are used to calculate the neoclassical fast-ion velocity space lost to the FILD and to quantify the neoclassical fast-ion losses. |
| eu_rights_str_mv | openAccess |
| format | article |
| id | ES_51f28c7ef9ded29e5a5efaa33d08ce54 |
| institution | Universidad de Sevilla (US) |
| instname_str | Universidad de Sevilla (US) |
| network_acronym_str | ES |
| network_name_str | España |
| oai_identifier_str | oai:dnet:idus________::26ca94332fbed6d5777835182e8846ca |
| publishDate | 2025 |
| publishDateSort | 2025 |
| publisher | IOP Publishing |
| publisherStr | IOP Publishing |
| reponame_str | idUS. Depósito de Investigación de la Universidad de Sevilla |
| spelling | First measurements of velocity-space resolved intra-ELM fast-ion losses on the TCV tokamak Poley-Sanjuán, J. Jansen van Vuuren, A. Galdón Quiroga, Joaquín Mazzi, S. Podestà, M. Dreval, M.B. Duval, B. P. Fasoli, A. Karpushov, A. N. Labit, B. Kumar, U. EUROfusion Tokamak Exploitation Team TCV Team Fast particles FILD ELMs Microsecond velocity-space Acceleration Edge Localised Modes (ELMs) induced fast-ion losses have been characterised in the energy, E, and pitch, λ = v∥/v, space using a unique Fast Ion Loss Detector (FILD) on the tokamak à configuration variable. The FILD is equipped with a 128 Avalanche Photo Diodes (APDs) camera measuring scintillator emission with a 1 MHz bandwidth. The well-defined view lines of the APDs allow for obtaining velocity space information from the emission pattern with unprecedented temporal resolution. Making use of the enhanced FILD capabilities, ELM-induced fast-ion losses were investigated in the ITER Baseline Scenario, mimicking its shape and normalised plasma parameters. Significant fast-ion losses were observed, notably before and during the ELM crashes induced by the presence of a 2/1 MHD instability localised at the plasma’s normalised radius, ρ ∼ 0.7. The fast-ion interaction with the plasma instability is concluded to be unconnected to the presence of the ELMs. During the ELM crashes, there is an observed spread in both the fast-ion pitch and energy that reaches higher values (∼70 keV) than expected from the pre-ELM fast-ion population, generated by Neutral Beam Injection at ∼27 keV. This implies a fast-ion acceleration during the ELM’s crash. Full orbit neoclassical simulations are used to calculate the neoclassical fast-ion velocity space lost to the FILD and to quantify the neoclassical fast-ion losses. IOP Publishing https://hdl.handle.net/11441/186015 https://doi.org/10.1088/1741-4326/adf95b |
| spellingShingle | First measurements of velocity-space resolved intra-ELM fast-ion losses on the TCV tokamak Poley-Sanjuán, J. Fast particles FILD ELMs Microsecond velocity-space Acceleration |
| status_str | publishedVersion |
| title | First measurements of velocity-space resolved intra-ELM fast-ion losses on the TCV tokamak |
| title_full | First measurements of velocity-space resolved intra-ELM fast-ion losses on the TCV tokamak |
| title_fullStr | First measurements of velocity-space resolved intra-ELM fast-ion losses on the TCV tokamak |
| title_full_unstemmed | First measurements of velocity-space resolved intra-ELM fast-ion losses on the TCV tokamak |
| title_short | First measurements of velocity-space resolved intra-ELM fast-ion losses on the TCV tokamak |
| title_sort | First measurements of velocity-space resolved intra-ELM fast-ion losses on the TCV tokamak |
| topic | Fast particles FILD ELMs Microsecond velocity-space Acceleration |
| topic_facet | Fast particles FILD ELMs Microsecond velocity-space Acceleration |
| url | https://hdl.handle.net/11441/186015 https://doi.org/10.1088/1741-4326/adf95b |