Criteria for Second Stability for Ballooning Modes in Stellarators

Hudson, S.R. ; C.C.Hegna

Princeton University. Plasma Physics Laboratory.

关键词: Ballooning Instabilities;    Eigenfunctions;    Stellarators Ballooning Instabilities;    70 Plasma Physics And Fusion Technology;    Stellarators;   

DOI  :  10.2172/828269
RP-ID  :  PPPL-3977
RP-ID  :  AC02-76CH03073
RP-ID  :  828269

美国|英语

来源: UNT Digital Library

【 摘 要 】

An expression determining how variations in the pressure-gradient and average magnetic shear affect ballooning stability for a stellarator equilibrium is presented. The procedure for determining the marginal stability boundaries, for each field line, depends only on the equilibrium and a single ballooning eigenfunction calculation. This information is sufficient to determine if increasing pressure-gradient is stabilizing or destabilizing and to predict whether the configuration possess a second stable region.