Plasma Core

It stores plasma in its single torroidal chamber within its magnetic constriction.
The plasma swirls around in a clockwise or counterclockwise direction (so an even # of them
are used to balance the motion of each other out).  A fill port at one end and a drain port
at the other are connected to the magnetic constriction assemblies.  The rotating magnetic
field element rotates at a variable speed while passing a magnetic field through the plasma
storage chamber causing the plasma to move with it.  This allows the magnetic fill and drain
ports to pass plasma through at variable rates of speed.  Plasma is always there ready to be
used.  The faster the element rotates, the faster plasma can be put in, taken out, or passed
through the plasma supply tank.  It can spin at a rate fast enough to allow complete
pass-through of plasma as well as peak plasma channeling (can drain faster that it is being
filled).

Comes in various sizes.  The largest models are often Integrated with the warp core to
provide peak power, usually 2 or 4 plasma cores per warp core.  It is a torroidal unit with
thick layers of magnetic containment systems (permanent magnets) and a heavily armored casing.
It works by filling it with drive plasma by the warp core--or by secondary systems--and then
releasing that plasma at the same time that the warp core is offline for secondary or
emergency power.  Used mostly for peak shields, warp propulsion, weaponry, or sublight
propulsion.