Diaceleric structures in magnetized plasmas

Abstract

The existence of novel confinement configurations in magnetized plasmas, coined diaceleric structures, is predicted. The conditions for these configurations to emerge are derived and shown to depend on the functional relation between the so-defined material flux fraction and central velocity pitch. The analysis is based upon the application of the coercive criterion, followed by the adjustment procedure, developed by other authors, to a variational method approach. A complete description of Lagrange multipliers and Beltrami eigenvalues in terms of strictly physical parameters is presented. The model recovers the diamagnetic and reversed field pinch structures, investigated by those authors, leading to a comprehensive classification of the relaxed states in magnetized plasmas.