Plasma reactor
A plasma reactor was a type of power generator that could be fueled by deuterium.

In 2257, the crew of  used the abundant deuterium on Essof IV to create a plasma reactor that produced the equivalent energy of twelve warp cores, enough to power the phase discriminators needed to trap the Red Angel. ()

The Tamarian deep space cruiser utilized a plasma reactor. During a standoff with such a Tamarian vessel in 2368, Data reported a power surge in their plasma reactor, indicating they were about to fire on a  shuttlecraft. ()
Energy technology
Spacecraft components