• Magnetic geometry and external fields largely determine confinement and stability across stellarator, cusp, and toroidal configurations, integrating theory and experiments from the Stellarator Concept to model C stellarator and theta-pinch studies. [2], [16], [14], [8], [9], [11]

• Empirical evidence links containment times, rotation, and instabilities to confinement viability, showing how magnetic geometry and external driving shape disruption modes in theta-pinch and related devices. [17], [8], [4], [9]

• Theoretical and experimental work maps plasma waves and instabilities—drift instabilities, hydromagnetic waves, and ion oscillations—delineating stability boundaries and wave–particle interactions in confinement systems. [10], [20], [7], [11]

• Kinetic transport studies and test-particle methods underpin energy confinement limits, from Liouville-based reductions to runaway electrons/ions, diffusion across magnetic fields, and recombination in dense plasmas. [1], [15], [18], [13], [6]

• External-field strategies—RF confinement, beam–plasma interactions, and cusp-injection geometry—extend confinement prospects and inform stability in diverse device concepts. [6], [12], [19], [14]