SP-345 Evolution of the Solar
System

FIGURE 15.3.3. Geometry of the
Lindberg plasma ring experiment. (a) Before leaving the gun, me
plasma has a toroidal magnetization B. It is shot through
the radial field N-S. (b) On leaving the gun, the plasma ring pulls
out the lines of force of the static magnetic field. (c) Plasma ring
with captured poloidal field. If the toroidal magnetic energy is too
large, a part of it is transferred to poloidal magnetic energy
(through kink instability of the current). (d) The poloidal magnetic
flux
during the above experiment. The upper curve shows how
the ring, when shot out from the gun, first acquires a poloidal flux
. An instability of the ring later transforms toroidal
energy into poloidal energy thus increasing the flux from
to
, The upper and lower curves represent the flux measured
by two loops at 15 and 30 cm distance from the gun,
respectively.
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