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URLhttps://doi.org/10.18429/JACoW-IPAC25-TUPS094
TitleDiagnosing an In-Vacuum Undulator in the ALS storage ring
Authors
  • D. Bertwistle, C. Steier, E. Wallén, F. Sannibale, J. Dickert, M. Kritscher, S. Leemann, S. Trovati, T. Hellert, T. Scarvie
    Lawrence Berkeley National Laboratory
AbstractThe Advanced Light Source (ALS) has an in-vacuum undulator named “LEDA”. 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.
Paperdownload: TUPS094.pdf
CiteBibTeX, LaTeX, Text/Word, RIS, EndNote
Conference16th International Particle Accelerator Conference
Series
LocationTaipei, Taiwan
Date01-06 Jun 2025
PublisherJACoW Publishing, Geneva, Switzerland
Editorial Board* Ming-Chyuan Lin - National Synchrotron Radiation Research Center * Yoichi Sato - KEK * Jui-Che Huang - National Synchrotron Radiation Research Center * David Button - Australian Nuclear Science and Technology Organisation * Ping-Shun Chuang - National Synchrotron Radiation Research Center
Online ISBN978-3-95450-248-6
Online ISSN2673-5490
Received28 May 2025
Revised04 June 2025
Accepted05 June 2025
Issued06 June 2025
DOI10.18429/JACoW-IPAC25-TUPS094
Pages1569-1571