Speaker
Description
The final phase of the ALS-U Accumulator Ring (AR) installation and integration at Berkeley Lab is underway, with commissioning scheduled to begin in spring 2027. The AR is a new intermediate ring between the injector synchrotron and the upgraded Storage Ring (SR), which will be installed during the upcoming two-year Dark Time (DT) period currently scheduled to start at the end of calendar year 2027. Before the DT, the AR will be commissioned while the existing SR continues to supply x-ray light to users.
The tunnel hardware installation of the AR is mostly complete as of spring 2026, and the electrical pit rack installation and electrical integration is progressing well. As the AR represents the first major installation phase of the ALS-U project, many challenges were encountered and invaluable lessons learned were captured along the way and will be applied during the upcoming removal of the existing SR and installation of the new multibend acromat SR.
In my presentation I will discuss the AR installation methods, the lessons learned from the installation and how they are applied in our preparation for the long DT.