A cutaway of the Injector Facility at Sector 20. At top, in dark blue, is the laser room where the
drive laser is housed. The drive laser creates UV light, which
travels to the RF gun located in the injector vault 30 feet below ground. The RF gun turns the laser light into electron pulses, which then accelerate through the injector pipes and into the linac
(from right to left in this image).
A movie of the process is also
available online. (Image and movie courtesy of SLAC's InfoMedia.)