Plasma Physics
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Ergodicity-Based ACF Estimation Resolves Interval-Length Dependence in Solar Wind Turbulence Scales
Standard autocorrelation function (ACF) estimators for solar wind turbulence produce integral timescales that artificially depend on the observation interval length, because they fail to capture true long-lag behavior. The authors introduce a new ACF estimator with superior ergodic convergence that …
Inversion-Based Shape Control Framework Enables Decoupling and Vertical Stability Gains on NSTX-U
Inversion-based shape control (IBSC) linearizes plasma equilibria to derive sensitivity mappings, which are inverted to compute feedback currents or voltages in tokamaks. The framework incorporates extensions like dynamic voltage mappings and quadratic-program constrained control, while addressing c…