Microfusion initiator

A microfusion initiator is a component of 24th century power reactors.

In 2372, a group of rogue Jem'Hadar attacked Deep Space 9 and stole several microfusion initiators, along with other technology such as photonic amplifiers and EPS power stabilizers, to be used to bring an Iconian gateway in the Gamma Quadrant online. 

Miles O'Brien determined that Jem'Hadar warships did not use microfusion initiators when aboard such a vessel on Torga IV in 2373. 

In 2376, Geordi La Forge used microfusion initiators and an EPS power stabilizer to open an Iconian gateway that was aboard a Petraw ship.