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Characterization of the ion pedestal in low and high collisionality plasmas

Opened Access Characterization of the ion pedestal in low and high collisionality plasmas
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Autor: Cruz Zabala, Diego José
Director: Viezzer, Eleonora
Departamento: Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear
Fecha: 2017
Tipo de documento: Trabajo Fin de Master
Titulación: Universidad de Sevilla. Máster Universitario en Física Nuclear
Resumen: The high confinement mode (H-mode) is a very important regime for future fusion devices. In this regime, the global confinement is increased and a pedestal structure is developed in the profiles. However, a complete understanding of how it is formed is still missing. In this regime, the toroidal impurity velocity profile exhibits a local minimum close to the separatrix and, under certain conditions, the impurities at the plasma edge can rotate in the opposite direction compared to the plasma core. A pedestal database was compiled with data from ASDEX Upgrade to try to progress in understanding the pedestal physics. This thesis is focussed on the study of the ion temperature and toroidal impurity velocity profiles, obtained with the charge exchange recombination spectroscopy system, at low and high collisionality. A correlation between the characteristics of the pedestal with the minimum in the toroidal impurity velocity was studied. It has been observed that the minimum in the toro...
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Cita: Cruz Zabala, D.J. (2017). Characterization of the ion pedestal in low and high collisionality plasmas. (Trabajo Fin de Máster Inédito). Universidad de Sevilla, Sevilla.
Tamaño: 7.815Mb
Formato: PDF

URI: http://hdl.handle.net/11441/67956

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