Anharmonic mixing in a magnetic trap

Anharmonic mixing in a magnetic trap

We have experimentally observed re-equilibration of a magnetically trapped cloud of metastable neon atoms after it was put in a non-equilibrium state. Using numerical simulations we show that anharmonic mixing, equilibration due to the collisionless dynamics of atoms in a magnetic trap, is the domin...

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Hauptverfasser: Gommers, R, Claessens, B. J, Hawthorn, C. J, Beijerinck, H. C. W, Vredenbregt, E. J. D
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Claessens, B. J
Hawthorn, C. J
Beijerinck, H. C. W
Vredenbregt, E. J. D
description We have experimentally observed re-equilibration of a magnetically trapped cloud of metastable neon atoms after it was put in a non-equilibrium state. Using numerical simulations we show that anharmonic mixing, equilibration due to the collisionless dynamics of atoms in a magnetic trap, is the dominant process in this equilibration. We determine the dependence of its time on trap parameters and atom temperature. Furthermore we observe in the simulations a resonant energy exchange between the radial and axial trap dimensions at a ratio of trap frequencies \omega_r / \omega_z = 3/2. This resonance is explained by a simple oscillator model.
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title Anharmonic mixing in a magnetic trap
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