Fusor
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A fusor is a device that uses an electric field to heat ions to a temperature at which they undergo nuclear fusion. The machine induces a voltage between two metal cages inside a vacuum. Positive ions
A homemade fusor
Farnsworth–Hirsch fusor during operation in so called "star mode" characterized by "rays" of glowing plasma which appear to emanate from the gaps in the inner grid.
Image showing a different grid design.
Polywell
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The polywell is a proposed design for a fusion reactor using an electric and magnetic field to heat ions to fusion conditions.
Fusor
…fusor-based neutron generator. From 2006 until his death in 2007, Robert W. Bussard gave talks on a reactor similar in design to the fusor, now called the polywell, that he stated would be capable of useful power generation. Most recently, the fusor has gained popularity among amateurs, who choose them as home…
A homemade fusor
Figure 2: A plot of the magnetic field generated by the MaGrid inside a polywell. The null point is marked in red in the center.
Figure 4: Illustration of single electron motion inside the polywell. It is based on figures from "Low beta confinement in a polywell modeled with conventional point cusp theories" but is not an exact copy.