A General Principle for Plasma Stability through Forced Phase Locking

A General Principle for Plasma Stability through Forced Phase Locking: The Active Memory Engineering (AME) Protocol Abstract:The realization of sustainable nuclear fusion remains obstructed by anomalous energy transport driven by multi-scale plasma turbulence. For decades, dominant stability paradigms have equated confinement with proximity to static magnetohydrodynamic equilibria. This work shows that this assumption is incomplete. We introduce a general physical principle termed Active Memory Engineering (AME). Treating plasma as a system with memory, we demonstrate that stability can be achieved without static equilibrium by synchronizing turbulent trajectories onto a low-dimensional, phase-locked manifold. Using a non-Markovian, memory-based feedback protocol, we show via numerical integration of the Hasegawa-Wakatani drift-wave model that the high-dimensional phase space of turbulent plasma can be dynamically folded into a stable limit cycle. In this regime, turbulence is not suppressed but synchronized, preventing stochastic runaway and substantially reducing energy transport. Key Innovations: - Trajectory Homeostasis: A shift from optimizing static magnetic geometry (e.g., stellarator coil complexity) toward dynamic feedback stabilization of trajectories. - Latency Tolerance: The AME protocol targets phase envelopes rather than instantaneous fluctuations, relaxing control bandwidth requirements from MHz to kHz ranges compatible with FPGA architectures. - ELM Mitigation Pathway: The framework suggests a route toward stabilizing edge-localized modes (ELMs) in tokamaks without breaking magnetic symmetry via resonant magnetic perturbations. Included Materials: Main Manuscript: Theoretical formulation and numerical demonstration (Fig. 1) of turbulence spectral collapse under AME control. Supplementary Materials: - Detailed numerical setup (Hasegawa–Wakatani model parameters). - Reference Algorithm (S8): A complete discrete-time implementation of the AME memory-kernel controller, suitable for deployment in real-time Linux or FPGA-based systems. Implications:The AME framework provides a physically realizable route to stable confinement across both stellarator (e.g., LHD, W7-X) and tokamak (e.g., ITER) geometries, reframing fusion control as a problem of active memory management rather than static equilibrium optimization. Philip Rey 01.01.2026