Ballooning optimized pressure profiles in toroidal Heliacs
1994; IOP Publishing; Volume: 34; Issue: 5 Linguagem: Inglês
10.1088/0029-5515/34/5/i01
ISSN1741-4326
Autores Tópico(s)Superconducting Materials and Applications
ResumoThe local 3-D ideal MHD stability properties for two different H-1 Heliac configurations with values of magnetic well of 1.3 and 3.2%, respectively, have been investigated. The pressure profile has been determined that approaches marginal stability to 3-D ballooning modes almost uniformly across the plasma radius for each case. In spite of the difference in well depths, the beta limits for both configurations are almost the same (at β ≃ 0.8%). The optimal pressure profile for the deep well configuration is slightly more peaked than that for the standard configuration. The ballooning imposed beta limits are more stringent than those of the Mercier criterion (β ≃ 1%) and the ballooning optimized pressure profiles are more peaked than the corresponding profiles which are marginal according to the Mercier criterion
Referência(s)