Galactic Concentrator

A torus with a single 540degree cut running through it.
Or with a 1.5 twist mobius band cut out of it.

I don't know if this will work as a real thing, just an export from the blend file I used to make this video:

http://www.youtube.com/watch?v=3_VydFQmtZ8

Invention of professor Carlos Séquin.