A non-neutral torus is a special shape made in a lab by scientists. It's called "non-neutral" because it is made up of charged particles that are not equal in number. Think of these particles as little things that have either a positive (+) or negative (-) electrical charge. In a non-neutral torus, there are more of one type of particle than the other.
The torus is a special shape that looks like a doughnut. Imagine taking a circle and bending it in half to make it look like a sideways letter "C." Now imagine bending the two ends of the "C" around to meet so that it forms a circle again. That circular shape with a hole in the middle is called a torus.
In the Columbia non-neutral torus, the charged particles are trapped inside this donut shape by using powerful magnetic fields. The goal of this experiment is to see how these particles move and interact with each other. Scientists believe that Non-neutral tori can help in designing better fusion reactors, which have the potential to provide a new source of clean, safe and efficient energy.
So, the Columbia non-neutral torus is a special shape that is made to study a bunch of charged particles which aren't equal in number and it can help scientists design better fusion reactors.