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Abstract
A system for analyzing equilibria with fully kinetic ions is developed, aimed at understanding ion end-loss rates in field-reversed configurations. The method builds upon the constants of motion in energy-momentum phase space. Four provinces in phase space are identified. These appear as trapping bands in the momentum index, which will be defined. The trapping bands are magnetic, mirror, electric-drift, and untrapped (chaotic). The first three have excellent trapping ability. The electric-drift trap is apparently new. How trapping is affected by ion energy, mirror ratio, and electrical biasing (a new trapping effect) is investigated. The results appear to be consistent with the experimental inferences of surprisingly good axial confinement of the scrape-off layer outside the separatrix of field-reversed configurations.
Published Version
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