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1) Line up the axis of rotation, around which the particle stream is flowing, to be parallel to the axis of the Earths rotation. This will the effect of not subjecting them to forced precession.
2) Divide the torus into quarters and place long strait sections between them, creating a square plasma
channel with rounded corners. Thus the lossy corners, where the plasma is forced to change direction, becomes a fraction of the total plasma length.
3) Mirrors could be placed at each corner to reflect the light that comes up one strait section down the next. The idea would be. a) to keep the light energy in the system, so it can help to heat the plasma, by Compton scattering. b) if it is possible to achieve sufficient amplification by stimulated emission, then more of the light would travel round with the plasma. reducing the radiant heating of the chamber walls.
4) The mirror at one corner could be split and off set such that light travelling in the same direction as the plasma sees a complete mirror and is reflected round, but that light travelling in the opposite direction sees a mirror with a gap in it and part of the light is lost. The hoped for advantage of this would be that the Compton scattering would be taking place preferentially in one direction, further accelerating the plasma and any neutron that are present.
5) 3 and 4 could be repeated for xrays by using grazing angle mirrors, in long curves between the parallel strait sections.
Net Positive Energy Fusion
Not actually related to the idea, but the article was just published yesterday, so I had to link it. [MechE, Feb 13 2014]
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||The constituent particles of a plasma in a fusion
reactor move too fast/randomly for them to be
significantly affected by such trifles as the Earth's
gravitation or Coriolis force or precession.
||The simplest way to improve the standard torus
design is simply to make its major diameter huge,
like putting it in the tunnel of the Large Hadron
Collider. All short segments of the torus will be
practically indistinguishable from "straight".
||sounds a bit like the Bussard design (octagonal?)
||I would suggest that the advantage of long
straight aways is offset by the resulting tighter
||With respect to 3 and 4, interesting thoughts, not
certain enough about accelerator design to
||(And see link for the latest in fusion, a laser driven
approach where energy out of the target is greater
than energy in, although not enough greater to
offset system inefficiencies at this point)
||I would have thought plasma being a natural state
would like to curl, twist and form eyes . Straight
lines are not for are really the pattern indicated by a
particle collision tracks.
||I would have thought it is a game of matching
particle population curvatures. The TV programme
'Defying Gravity' comes to mind.