SLAC

The Stanford Linear Accelerator Center has a 2 mile linear accelerator. In a single pass, it accelerates electrons to 25 GeV. In one configuration it feeds electrons and positrons into the SPEAR colliding beam storage rings.The Stanford Positron Electron Accelerator Rings (SPEAR) is notable for the discovery of the charm quark and the tau lepton. By achieving full acceleration for electrons and positrons in opposite directions, it can achieve 50 GeV of energy for colliding beam experiments. This energy corresponds to the electron traveling at a speed within 2 cm/s of the speed of light (Ohanian).

Electrons are accelerated to 30 MeV before injection into the main accelerator. Electromagnetic waves are generated by 245 microwave oscillators (klystrons) operating at a power of 67 megawatts apiece (Blatt)!

See schematic on p412 of Blatt's Modern Physics

Lawrence Berkeley National Laboratory

The Lawrence Berkeley National Laboratory (LBL) was founded in 1931 by Ernest Lawrence and continues to operate on the campus of the University of California, Berkeley. It's first major research instrument was a cyclotron for which Lawrence was awarded the Nobel Prize in Physics in 1939.