Two newer approaches both try to solve a problem found in the fusor, which is that some ions collide with the grids.

When these ions collide with electrically neutral particles they recombine and emit photons in the process, causing airglow.

As they traverse the gap between the electrodes, the ions collide with neutral air molecules creating a body force and a pressure head in the air.

The reason why we have electrical appliances today is because these negative ions collide into the positive ions in a circuit.

The molecular ions collide with neutral gas molecules such as helium, nitrogen or argon.

Sometimes two ions collide at the center and fuse.

When the ions collide, scientists hope they will be able to observe conditions similar to those that existed at the birth of the universe.

Although champagne corks may pop as ions collide, there will not be a Hollywood-style eureka moment.

The frequency with which the molecules or ions collide depends upon their concentrations.

Bound-bound transitions occur when the ions and neutral atoms collide, transferring an electron from the atom to the ion.