Article
Dependence on plasma shape and plasma fueling for small ELM regimes in TCV and ASDEX Upgrade
Author/s | Labit, B.
Eich, T. Harrer, G. Wolfrum, E. Bernert, M. Jet Contributors García Muñoz, Manuel Ayllón Guerola, Juan Manuel Cano Megías, Pilar Cruz Zabala, Diego José Domínguez-Palacios Durán, Jesús José Galdón Quiroga, Joaquín García López, Francisco Javier Gonzalez Martin, Javier Rodríguez Ramos, Mauricio Sanchís Sánchez, Lucía Soria del Hoyo, Carlos Toscano Jiménez, Manuel Viezzer, Eleonora |
Department | Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear Universidad de Sevilla. Departamento de Ingeniería Mecánica y Fabricación Universidad de Sevilla. Departamento de Ingeniería Energética Universidad de Sevilla. Departamento de Electrónica y Electromagnetismo Universidad de Sevilla. Departamento de Física Aplicada III |
Publication Date | 2019-08 |
Deposit Date | 2020-06-30 |
Published in |
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Abstract | Within the EUROfusion MST1 Work Package, a series of experiments
has been conducted on AUG and TCV devices to disentangle the role of plasma
fueling and plasma shape for the onset of small ELM regimes. On both devices, ... Within the EUROfusion MST1 Work Package, a series of experiments has been conducted on AUG and TCV devices to disentangle the role of plasma fueling and plasma shape for the onset of small ELM regimes. On both devices, small ELM regimes with high confinement are achieved if and only if two conditions are fulfilled at the same time. Firstly, the plasma density at the separatrix must be large enough (ne,sep/nG ∼ 0.3), leading to a pressure profile flattening at the separatrix, which stabilizes type-I ELMs. Secondly, the magnetic configuration has to be close to a Double Null (DN), leading to a reduction of the magnetic shear in the extreme vicinity of the separatrix. As a consequence, its stabilizing effect on ballooning modes is weakened. |
Project ID. | 633053 |
Citation | Labit, B., Eich, T., Harrer, G., Wolfrum, E., Bernert, M., Jet Contributors, ,...,Viezzer, E. (2019). Dependence on plasma shape and plasma fueling for small ELM regimes in TCV and ASDEX Upgrade. Nuclear Fusion, 59 (8), 2-26. https://doi.org/10.1088/1741-4326/ab2211. |
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