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The research aims to investigate the guiding-center dynamics of charged particles in a screw-pinch magnetic field.

Guiding-center dynamics in a screw-pinch magnetic field

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The research aims to investigate the guiding-center dynamics of charged particles in a screw-pinch magnetic field.
Analyzed charged particle motion in a symmetric screw-pinch magnetic field.
Verified adiabatic-invariant series expansion of the radial action integral.
Compared radial action integral with magnetic-moment gyroaction perturbation expansion.
Found that the radial action integral matches the perturbation expansion up to first order.
Established that the radial action integral is an exact invariant of the full-orbit dynamics.
Demonstrated the magnetic moment can be expressed as a non-perturbative integral, useful for validating guiding-center approximations.

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Research investigates guiding-center dynamics in charged particles within magnetic fields, suggesting a method for approximation testing.

A.J. Brizard (2026) studied this question.

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