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Pulsars in the Lab
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_Modelirovanie Povedenya Pulsara v Nizkotemperaturnoi Laboratorii_

_Modeling of Pulsar Behavior in a Low Temperature Laboratory_

by J.S. Tsakadze & S.J. Tsakadze _Astrophysics_, 15(3): 533-547,
August, 1979
A Journal of the Acadamy of Science of the Armenian SSR

_Very_ briefly, the laboratory model was a spherical vessel of
superfluid liquid helium, attached to the end of a rod, and suspended
from magnetic bearings. The surrogate pulsar was then spun up to some
steady speed, and then allowed to spin down on its own. The time
dependence of the angular velocity of the helium vessel was then
monitored with a grazing incidence laser beam. The resultant spin-down
behavior was compared to a generic pulsar time dependence curve. The
two curves were matched very well qualitatively, showing the same
shape, and the same 'glitch' behavior, with increases in speed, and
the same ringing oscillations.

Based on these results, the authors attributed the pulsar behavior on
the transfer of angular momentum to the pulsar surface by vortices in
the superfluid pulsar interior. When the vortices reach the surface
they collapse, and the thin surface layer picks up the momentum. So in
this model the sudden step-ups in spin rate observed, are really only
the surface, not the whole pulsar body. The oscillating spin-down that
follows is just the surface coming back into mechanical equilibrium
with the pulsar body.
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References

1. http://www.geocities.com/CapeCanaveral/8851/