From Berkeley Lab: “APEX: At the Forefront of What’s Needed for the Next Generation of Light Sources”

Berkeley Lab

Berkeley Lab scientists and engineers are building and testing a unique electron gun, the front end for a new generation of accelerators for free electron lasers

Paul Preuss
March 15, 2012

“The focus of Berkeley Lab’s Advanced Photon Injector Experiment, APEX, is an extraordinary electron gun specially designed for the front end of superconducting accelerators. When it’s complete, the APEX gun will be able to produce well-formed bunches of electrons in pulses a few trillionths or even mere quadrillionths of a second long, at rates of up to a million bunches per second.

‘With the kind of accelerator-based x-ray light sources we’re designing for, the quality of the electron beam is determined right when the electrons leave the gun, says Fernando Sannibale of the Accelerator and Fusion Research Division (AFRD), who heads the APEX project. ‘We need tight electron bunches with high charge, high energy, and a very high repetition rate. And we need the gun to operate reliably over long periods.'”

With its cables and wires and wave-guides and cables, APEX is a snug fit in the Beam Test Facility at the Advanced Light Source. (Lawrence Berkeley National Laboratory photo by Roy Kaltschmidt)

See the full article here.

A US Department of Energy National Laboratory Operated by the University of California