The topic torus is discussed in the following articles:

accretion disk formations

  • TITLE: accretion disk (astronomy)
    SECTION: Physical description
    ...thin, and its thickness will be much smaller than its radial extent. If pressure forces are comparable to rotation and gravity, the accretion disk will be geometrically thick, resembling more a torus than a disk.


  • TITLE: particle accelerator (instrument)
    SECTION: Betatrons

nuclear fusion reactors

  • TITLE: fusion reactor
    SECTION: Confinement physics
    ...developed. In a simple straight magnetic field, the plasma would be free to stream out the ends. End loss can be eliminated by forming the plasma and field in the closed shape of a doughnut, or torus, or, in an approach called mirror confinement, by “plugging” the ends of such a device magnetically and electrostatically.