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physics.plasm-ph2024
The High-Order Magnetic Near-Axis Expansion: Ill-Posedness and Regularization
Maximilian Ruth, Rogerio Jorge, David Bindel
When analyzing stellarator configurations, it is common to perform an asymptotic expansion about the magnetic axis. This so-called near-axis expansion is convenient for the same re…
physics.plasm-ph2024
Non-perturbative guiding center model for magnetized plasmas
J. W. Burby, I. A. Maldonado, M. Ruth +1
Perturbative guiding center theory adequately describes the slow drift motion of charged particles in the strongly-magnetized regime characteristic of thermal particle populations…
math.DS2024
Finding Birkhoff Averages via Adaptive Filtering
Maximilian Ruth, David Bindel
In many applications, one is interested in classifying trajectories of Hamiltonian systems as invariant tori, islands, or chaos. The convergence rate of ergodic Birkhoff averages c…