Self-adaptive diagnostic of radial fast-ion loss measurements on the ASDEX Upgrade tokamak (invited)
A poloidal array of scintillator-based Fast-Ion Loss Detectors (FILDs) has been installed in the ASDEX Upgrade (AUG) tokamak. While all AUG FILD systems are mounted on reciprocating arms driven externally by servomotors, the reciprocating system of the FILD probe located just below the midplane is b...
| Autores: | , , , , , , , , , , , , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2021 |
| País: | España |
| Institución: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/259487 |
| Acceso en línea: | http://hdl.handle.net/10261/259487 |
| Access Level: | acceso abierto |
| Palabra clave: | Plasma confinement Plasma fluctuations Scintillators Retraction Tokamaks Plasma instabilities Plasma diagnostics Spectrograms Optical devices |
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oai:digital.csic.es:10261/259487 |
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España |
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Self-adaptive diagnostic of radial fast-ion loss measurements on the ASDEX Upgrade tokamak (invited) González-Martín, Javier García-Muñoz, M. Sieglin, B. Herrmann, A. Lunt, T. Ayllón Guerola, Juan Manuel Galdón Quiroga, Joaquín Hidalgo-Salaverri, Javier Kovacsik, A. Rivero-Rodriguez, J.F. Sanchís Sánchez, Lucía Silvagni, D. Zoletnik, S. Dominguez-Palacios, J. ASDEX Upgrade Team MST1 Team Plasma confinement Plasma fluctuations Scintillators Retraction Tokamaks Plasma instabilities Plasma diagnostics Spectrograms Optical devices A poloidal array of scintillator-based Fast-Ion Loss Detectors (FILDs) has been installed in the ASDEX Upgrade (AUG) tokamak. While all AUG FILD systems are mounted on reciprocating arms driven externally by servomotors, the reciprocating system of the FILD probe located just below the midplane is based on a magnetic coil that is energized in real-time by the AUG discharge control system. This novel reciprocating system allows, for the first time, real-time control of the FILD position including infrared measurements of its probe head temperature to avoid overheating. This considerably expands the diagnostic operational window, enabling unprecedented radial measurements of fast-ion losses. Fast collimator-slit sweeping (up to 0.2 mm/ms) is used to obtain radially resolved velocity-space measurements along 8 cm within the scrape-off layer. This provides a direct evaluation of the neutral beam deposition profiles via first-orbit losses. Moreover, the light-ion beam probe (LIBP) technique is used to infer radial profiles of fast-ion orbit deflection. This radial-LIBP technique is applied to trapped orbits (exploring both the plasma core and the FILD stroke near the wall), enabling radial localization of internal plasma fluctuations (neoclassical tearing modes). This is quantitatively compared against electron cyclotron emission measurements, showing excellent agreement. For the first time, radial profiles of fast-ion losses in MHD quiescent plasmas as well as in the presence of magnetic islands and edge localized modes are presented. This work was carried out within the framework of the EUROfusion Consortium and received funding from the Euratom Research and Training Programme 2014–2018 and 2019–2020 under Grant Agreement No. 633053. The views and opinions expressed herein do not necessarily reflect those of the European Commission. This research also received funding from the Spanish Ministry of Science under Grant No. FPU15/06074. AIP Publishing http://hdl.handle.net/10261/259487 |
| title |
Self-adaptive diagnostic of radial fast-ion loss measurements on the ASDEX Upgrade tokamak (invited) |
| spellingShingle |
Self-adaptive diagnostic of radial fast-ion loss measurements on the ASDEX Upgrade tokamak (invited) González-Martín, Javier Plasma confinement Plasma fluctuations Scintillators Retraction Tokamaks Plasma instabilities Plasma diagnostics Spectrograms Optical devices |
| title_short |
Self-adaptive diagnostic of radial fast-ion loss measurements on the ASDEX Upgrade tokamak (invited) |
| title_full |
Self-adaptive diagnostic of radial fast-ion loss measurements on the ASDEX Upgrade tokamak (invited) |
| title_fullStr |
Self-adaptive diagnostic of radial fast-ion loss measurements on the ASDEX Upgrade tokamak (invited) |
| title_full_unstemmed |
Self-adaptive diagnostic of radial fast-ion loss measurements on the ASDEX Upgrade tokamak (invited) |
| title_sort |
Self-adaptive diagnostic of radial fast-ion loss measurements on the ASDEX Upgrade tokamak (invited) |
| author |
González-Martín, Javier |
| author_facet |
González-Martín, Javier García-Muñoz, M. Sieglin, B. Herrmann, A. Lunt, T. Ayllón Guerola, Juan Manuel Galdón Quiroga, Joaquín Hidalgo-Salaverri, Javier Kovacsik, A. Rivero-Rodriguez, J.F. Sanchís Sánchez, Lucía Silvagni, D. Zoletnik, S. Dominguez-Palacios, J. ASDEX Upgrade Team MST1 Team |
| author_role |
author |
| author2 |
García-Muñoz, M. Sieglin, B. Herrmann, A. Lunt, T. Ayllón Guerola, Juan Manuel Galdón Quiroga, Joaquín Hidalgo-Salaverri, Javier Kovacsik, A. Rivero-Rodriguez, J.F. Sanchís Sánchez, Lucía Silvagni, D. Zoletnik, S. Dominguez-Palacios, J. ASDEX Upgrade Team MST1 Team |
| author2_role |
author author author author author author author author author author author author author author author |
| topic |
Plasma confinement Plasma fluctuations Scintillators Retraction Tokamaks Plasma instabilities Plasma diagnostics Spectrograms Optical devices |
| topic_facet |
Plasma confinement Plasma fluctuations Scintillators Retraction Tokamaks Plasma instabilities Plasma diagnostics Spectrograms Optical devices |
| description |
A poloidal array of scintillator-based Fast-Ion Loss Detectors (FILDs) has been installed in the ASDEX Upgrade (AUG) tokamak. While all AUG FILD systems are mounted on reciprocating arms driven externally by servomotors, the reciprocating system of the FILD probe located just below the midplane is based on a magnetic coil that is energized in real-time by the AUG discharge control system. This novel reciprocating system allows, for the first time, real-time control of the FILD position including infrared measurements of its probe head temperature to avoid overheating. This considerably expands the diagnostic operational window, enabling unprecedented radial measurements of fast-ion losses. Fast collimator-slit sweeping (up to 0.2 mm/ms) is used to obtain radially resolved velocity-space measurements along 8 cm within the scrape-off layer. This provides a direct evaluation of the neutral beam deposition profiles via first-orbit losses. Moreover, the light-ion beam probe (LIBP) technique is used to infer radial profiles of fast-ion orbit deflection. This radial-LIBP technique is applied to trapped orbits (exploring both the plasma core and the FILD stroke near the wall), enabling radial localization of internal plasma fluctuations (neoclassical tearing modes). This is quantitatively compared against electron cyclotron emission measurements, showing excellent agreement. For the first time, radial profiles of fast-ion losses in MHD quiescent plasmas as well as in the presence of magnetic islands and edge localized modes are presented. |
| publishDate |
2021 |
| format |
article |
| status_str |
publishedVersion |
| url |
http://hdl.handle.net/10261/259487 |
| eu_rights_str_mv |
openAccess |
| publisher |
AIP Publishing |
| institution |
Consejo Superior de Investigaciones Científicas (CSIC) |
| collection |
DIGITAL.CSIC. Repositorio Institucional del CSIC |
| reponame_str |
DIGITAL.CSIC. Repositorio Institucional del CSIC |
| instname_str |
Consejo Superior de Investigaciones Científicas (CSIC) |
| _version_ |
1878437018552238080 |
| publishDateSort |
2021 |
| author_browse |
ASDEX Upgrade Team Ayllón Guerola, Juan Manuel Dominguez-Palacios, J. Galdón Quiroga, Joaquín García-Muñoz, M. González-Martín, Javier Herrmann, A. Hidalgo-Salaverri, Javier Kovacsik, A. Lunt, T. MST1 Team Rivero-Rodriguez, J.F. Sanchís Sánchez, Lucía Sieglin, B. Silvagni, D. Zoletnik, S. |
| publisherStr |
AIP Publishing |
| score |
6,924472 |