A fast model to resolve the velocity-space of fast-ion losses detected in ASDEX Upgrade and MAST Upgrade

A forward model to resolve the fast-ion loss velocity-space on a fast-ion loss detector (FILD) probe head (FILDSIM) has been extended, making it possible to perform real-time analysis of the FILD data ("real-time FILDSIM"). Parametric pre-processing with FILDSIM enables real-time mapping o...

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Detalles Bibliográficos
Autores: Rivero Rodríguez, Juan Francisco, García Muñoz, Manuel, Galdón Quiroga, Joaquín, González Martín, Javier, Ayllón Guerola, Juan Manuel, García Vallejo, Daniel, Martin, R., McClements, K. G., Sanchís Sánchez, Lucía, Zoletnik, S.
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2019
País:España
Institución:Universidad de Sevilla (US)
Repositorio:idUS. Depósito de Investigación de la Universidad de Sevilla
OAI Identifier:oai:idus.us.es:11441/142737
Acceso en línea:https://hdl.handle.net/11441/142737
https://doi.org/10.1088/1748-0221/14/09/C09015
Access Level:acceso abierto
Palabra clave:Data processing methods
Nuclear instruments and methods for hot plasma diagnostics
Particle identification methods
Scintillators, scintillation and light emission processes (solid, gas and liquid scintillators)
Descripción
Sumario:A forward model to resolve the fast-ion loss velocity-space on a fast-ion loss detector (FILD) probe head (FILDSIM) has been extended, making it possible to perform real-time analysis of the FILD data ("real-time FILDSIM"). Parametric pre-processing with FILDSIM enables real-time mapping of the raw FILD measurements to the velocity-space of the fast-ion distribution reaching the FILD probe, which depends on the local magnetic field at the probe head. Such parametric pre-processing facilitates the study of fast-ion losses in stages of the discharge other than the flat-top, such as the ramp-up phase when changes in the local magnetic field at the probe head cannot be neglected. Real-time FILDSIM has been applied to the existing and newly installed FILDs in ASDEX Upgrade and will be used for the forthcoming FILD in MAST-Upgrade. Due to the larger size of the MAST-U FILD probe, the approximation used in FILDSIM of a uniform magnetic field in the FILD region has been generalised to the case of a non-uniform field, with gyro-orbits calculated numerically in this field.

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