Speaker
Description
The Advanced Light Source (ALS) has an in-vacuum undulator aptly named “Leda,” after the Greek “Mother of Light.” It was installed in 2019 and provides high-brightness, high-energy photons for the ALS macromolecular crystallography beamline, Gemini. The undulator is a hybrid design with a minimum gap of 4.3 mm, a magnetic period of 15 mm, and a photon energy range of 5–19 keV. When the device was commissioned in the ALS storage ring, it had a negligible impact on ring operations. Recently, there has been a measured degradation in storage ring performance correlated with the Leda gap. Prior to conducting an invasive magnetic measurement, we performed a suite of beam-based measurements to characterize Leda. Herein, we detail these measurements and share them with the accelerator community, who may find them useful when encountering similar challenges.
Funding Agency
This work was supported by the Director of the Office of Science of the U.S. Department of Energy under Contract No. DEAC02-05CH11231.
| Region represented | America |
|---|---|
| Paper preparation format | LaTeX |
