MHD stability analysis of diagnostic optimized configuration shots in JET

Autor:	S Saarelma, V Parail, Y Andrew, E de la Luna, A Kallenbach, M Kempenaars, A Korotkov, A Loarte, J Lönnroth, P Monier-Garbet, J Stober, W Suttrop, Contributors to the EFDA-JET Workprogramme
Rok vydání:	2005
Předmět:	Jet (fluid) Materials science Magnetic confinement fusion Atmospheric-pressure plasma Plasma Mechanics Condensed Matter Physics Ballooning Nuclear Energy and Engineering Physics::Plasma Physics Physics::Space Physics Plasma diagnostics Atomic physics Edge-localized mode Pressure gradient
Zdroj:	Plasma Physics and Controlled Fusion. 47:713-731
ISSN:	1361-6587 0741-3335
DOI:	10.1088/0741-3335/47/5/003
Popis:	The plasma edge MHD stability is analysed for several JET discharges in the diagnostic optimized configuration. The stability analysis of Type I ELMy plasmas shows how after an edge localized mode (ELM) crash the plasma edge is deep in the stable region against low- to intermediate-n peeling?ballooning modes. As the pressure gradient steepens and the edge current builds up, the plasma reaches the low- to intermediate-n peeling?ballooning mode stability boundary just before the ELM crash. Increasing the plasma fuelling by gas puffing makes the second stability access against high-n ballooning modes narrower until it closes completely and the ELMs change from Type I to Type III. Reducing the plasma heating has a similar effect. Increasing the safety factor at the plasma edge improves the stability against low- to intermediate-n modes allowing steeper pressure gradients to develop before an ELM crash.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::de235d7469237ffbb7eae933b0115ac5 https://doi.org/10.1088/0741-3335/47/5/003 Zobrazit plný text záznamu