PhysOrg – APEX: At the forefront of what’s needed for the next generation of light sources
PhysOrg – APEX: At the forefront of what’s needed for the next generation of light sources
By Paul Preuss |16 March 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.”
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