Propelling charged particles
Particle accelerators are devices that use electrical fields to propel charged particles at high speeds to contain them. This technology was known to have been used by the Goa'uld Sokar and the Tau'ri.
The device was once used by Sokar to transmit an image of himself through the Iris of a Stargate. This accelerator also had the capability to heat up the Iris until it would be destroyed, which would bid him access to Apophis, who was recently captured. Fortunately, Apophis died, and they sent him through the Stargate between Sokar's diallings. (SG1: "Serpent's Song")