A new dispersion relation, and associated stability criteria, is derived for low-n external kink and infernal modes, and is applied to modelling the stability properties of quiescent H-mode like regimes. The analysis, performed in toroidal geometry with large edge pressure gradients associated with a local flattening of the safety factor, includes a pedestal, sheared toroidal rotation and a vacuum region separating the plasma from an ideal metallic wall. The external kink-infernal modes found here exhibit similarities with experimentally observed edge harmonic oscillations.
Analytic stability criteria for edge MHD oscillations in high performance ELM free tokamak regimes
Brunetti D;Lazzaro E;Mariani A;Nowak S;
2018
Abstract
A new dispersion relation, and associated stability criteria, is derived for low-n external kink and infernal modes, and is applied to modelling the stability properties of quiescent H-mode like regimes. The analysis, performed in toroidal geometry with large edge pressure gradients associated with a local flattening of the safety factor, includes a pedestal, sheared toroidal rotation and a vacuum region separating the plasma from an ideal metallic wall. The external kink-infernal modes found here exhibit similarities with experimentally observed edge harmonic oscillations.File in questo prodotto:
| File | Dimensione | Formato | |
|---|---|---|---|
|
prod_385386-doc_132094.pdf
solo utenti autorizzati
Descrizione: Articolo Pubblicato
Tipologia:
Versione Editoriale (PDF)
Dimensione
903.72 kB
Formato
Adobe PDF
|
903.72 kB | Adobe PDF | Visualizza/Apri Richiedi una copia |
|
prod_385386-doc_188628.pdf
accesso aperto
Descrizione: Preprint
Tipologia:
Versione Editoriale (PDF)
Dimensione
182.88 kB
Formato
Adobe PDF
|
182.88 kB | Adobe PDF | Visualizza/Apri |
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
