Spectrum-Based Alignment of In-Vacuum Undulators in a Low-Emittance Storage Ring

Chubar, O.; Kitegi, C.; Chen-Wiegart, Y. -C.  K.; Hidas, D.; Hidaka, Y.; Tanabe, T.; Williams, G.; Thieme, J.; Caswell, T.; Rakitin, M.; Wiegart, L.; Fluerasu, A.; Yang, L.; Chodankar, S.; Zhernenkov, M.

doi:10.1080/08940886.2018.1460173

Title: Spectrum-Based Alignment of In-Vacuum Undulators in a Low-Emittance Storage Ring

Journal Article · 04 May 2018 · Synchrotron Radiation News

DOI: https://doi.org/10.1080/08940886.2018.1460173 · OSTI ID:1483561

Chubar, O. ^[1]; Kitegi, C. ^[2]; Chen-Wiegart, Y. -C. K. ^[3]; Hidas, D. ^[1]; Hidaka, Y. ^[1]; Tanabe, T. ^[1]; Williams, G. ^[1]; Thieme, J. ^[1]; Caswell, T. ^[1]; Rakitin, M. ^[1]; Wiegart, L. ^[1]; Fluerasu, A. ^[1]; Yang, L. ^[1]; Chodankar, S. ^[1]; Zhernenkov, M. ^[1]

Brookhaven National Lab. (BNL), Upton, NY (United States). National Synchrotron Light Source II (NSLS-II)
Brookhaven National Lab. (BNL), Upton, NY (United States). National Synchrotron Light Source II (NSLS-II); SOLEIL Synchrotron, Gif-sur-Yvette (France)
Brookhaven National Lab. (BNL), Upton, NY (United States). National Synchrotron Light Source II (NSLS-II); Stony Brook Univ., NY (United States)

In-vacuum undulators (IVU) are used extensively at light source facilities, in particular at medium-energy storage rings, where these devices are the main sources of high-brightness hard X-rays. The relatively small vertical magnetic gaps that are used in these planar undulators make them rather sensitive to misalignments of magnet arrays with respect to the electron orbit in the vertical plane. Based on commissioning results of undulator-based hard X-ray beamlines at the National Synchrotron Light Source II (NSLS-II)—a Department of Energy Office of Science User Facility at Brookhaven National Laboratory— IVU misalignment was found to be the most frequent cause of spectral “underperformance.” It is possible, nevertheless, to restore the performance using a spectrum-based IVU alignment procedure described in this article.

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Research Organization:: Brookhaven National Lab. (BNL), Upton, NY (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)

Grant/Contract Number:: SC0012704

OSTI ID:: 1483561

Report Number(s):: BNL--209501-2018-JAAM

Journal Information:: Synchrotron Radiation News, Journal Name: Synchrotron Radiation News Journal Issue: 3 Vol. 31; ISSN 0894-0886

Publisher:: Taylor & FrancisCopyright Statement

Country of Publication:: United States

Language:: English

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Shaping Photon Beams with Undulators and Wigglers Bahrdt, Johannes Synchrotron Light Sources and Free-Electron Lasers https://doi.org/10.1007/978-3-319-04507-8_16-1	book	January 2014
Shaping Photon Beams with Undulators and Wigglers Bahrdt, Johannes Synchrotron Light Sources and Free-Electron Lasers https://doi.org/10.1007/978-3-319-04507-8_16-3	book	January 2019
Shaping Photon Beams with Undulators and Wigglers Bahrdt, Johannes Synchrotron Light Sources and Free-Electron Lasers https://doi.org/10.1007/978-3-319-14394-1_16	book	January 2016
New aspects of longitudinal instabilities in electron storage rings Blednykh, A.; Bacha, B.; Bassi, G. Scientific Reports, Vol. 8, Issue 1 https://doi.org/10.1038/s41598-018-30306-y	journal	August 2018
Effect of undulators on magnet lattice and emittance Smaluk, Victor; Li, Yongjun; Hidaka, Yoshiteru Physical Review Accelerators and Beams, Vol. 22, Issue 12 https://doi.org/10.1103/physrevaccelbeams.22.124001	journal	December 2019
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