The upgrade of the Advanced Light Source (ALS-U) is a $400M project commissioned by the Department of Energy, whose goal is to replace the accelerator and the storage ring of the ALS, in order to provide a fully coherent soft x-ray beam to the beamlines, limited only by the limits of physics.
The ALS Photon Science Development team is working in close collaboration with the ALS-U teams to ensure a successful transition through the upgrade, and develops new state-of-the-art endstations, to allow ALS users to take full advantage of the exquisite properties of coherent x-rays.
More information: https://als.lbl.gov/als-u/overview/
A nice interview about the ALS and ALS-U from the ALS director here: https://newscenter.lbl.gov/2025/05/22/expert-interview-dimitri-argyriou/
Here's a summary by Antoine Islegen-Wojdyla for the American Physical Society – Division of Physics of Beams (pdf):
(Access restricted to LBNL employees)
https://sites.google.com/lbl.gov/als-down-time
(Access restricted to LBNL employees)