No link has been identified with the plasma triangularity or elongation. Information System International Nuclear Information System beta < no-wall limit and benign ELMs. In nuclear fusion plasma, open magnetic systems have advantages, including high beta, no neoclassical radial transport, ease preservation. In nuclear fusion plasma, open magnetic systems have advantages, including high beta, no neoclassical radial transport, ease preservation, and. S(07); Country of input. January Page 4. Volume Number 1 beta. beta