Author: Doose, C.L.
Paper Title Page
MOPC12 A New Magnetic Measurement System for the Future Low Emittance NSLS-II Storage Ring 78
  • M. Musardo, T.M. Corwin, F.A. DePaola, L. Doom, R. Faussete, D.A. Harder, S.K. Sharma, T. Tanabe
    BNL, Upton, New York, USA
  • D. Assell, J. DiMarco
    Fermilab, Batavia, Illinois, USA
  • C.L. Doose, A.K. Jain
    ANL, Lemont, Illinois, USA
  Funding: This work was supported by DOE under contract DE-SC0012704
A new magnetic measurement system is under construc-tion at BNL for accurate field harmonic measurements and fiducialization of magnets for a future upgrade of the NSLS- II storage ring. The entire storage ring is envi-sioned to be replaced with a new lattice concept, known as Complex Bend, which superimposes dipole and high-gradient quadrupole fields. The magnetic measurement system will use rotating wire and a PCB rotating coil specifically designed for small-aperture (< 15 mm) high gradient magnets. In this paper we describe in detail the mechanical design and the data acquisition hardware and software.
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About • paper received ※ 15 July 2021       paper accepted ※ 13 October 2021       issue date ※ 03 November 2021  
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WEPB03 Magnet Measurement Systems for the Advanced Photon Source Upgrade 269
  • S.J. Izzo, C.L. Doose, A.K. Jain, W.G. Jansma
    ANL, Lemont, Illinois, USA
  Funding: Advanced Photon Source, a U.S. Department of Energy (DOE) Office of Science User Facility, operated for the DOE Office of Science by Argonne National Laboratory under Contract No. DE-AC02-06CH11357.
The Advanced Photon Source-Upgrade (APS-U) project* is under construction and will incorporate a new Multi-Bend Achromat (MBA) lattice. With this design, the new storage ring will require over 1320 new magnets that are being produced under build-to-print contracts to several vendors across the globe. Magnetic measurements are needed to characterize and fiducialize all these magnets to ensure field quality and alignment requirements are met. Seven specialized test benches were designed and built to meet the measurement requirements. These measurement benches may be classified into two groups. The first group is the field quality measurement that includes the strength of the main field and higher harmonics. The multipole magnets are measured using four rotating coil benches, whereas the longitudinal gradient dipoles are mapped using a Hall probe system. The second group is fiducialization that locates the magnetic center of the magnet using a rotating wire and relates it to magnet fiducials and reference surfaces using a laser tracker. This information accompanies each magnet through the module assembly and final installation in the ring to ensure that the magnet is aligned within the allowable tolerance. To date, about 65% of all magnets needed for the storage ring have been measured and fiducialized. Mechanical design of the measurement benches will be presented.
*Advanced Photon Source. (2017). APS Upgrade Project Preliminary Design Review Report (APSU-2.01-RPT-002). Retrieved from
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DOI • reference for this paper ※  
About • paper received ※ 16 July 2021       paper accepted ※ 06 October 2021       issue date ※ 28 October 2021  
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