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(PhysOrg.com) -- 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.

Two recent developments at the Advanced Photon Source explore paths to routine use of sub-meV x-rays to probe low-energy excitations in matter. The first is a remarkable experimental demonstration of an x-ray optical scheme that produces x-ray beams with sub-meV linewidths (FWHM) and elimination of the normal Lorentzian tails

Multilayer Laue lenses (MLLs) developed at the U.S. Department of Energy Office of Science’s Advanced Photon Source (APS) focus high-energy x-rays so tightly they can detect objects as small as 16 nanometers in size, and are in principle capable of focusing well below 10 nanometers

(PhysOrg.com) -- Researchers utilizing high-brightness x-rays at the U.S.

(PhysOrg.com) -- In a new report, scientists from the University of Rochester, Cornell University, and the Brookhaven and Argonne national laboratories carrying out research at national laboratories including the U.S. Department of Energy’s Advanced Photon Source at Argonne describe phase retrieval methods to measure wavefront aberrations produced by imperfect hard x-ray optics.