Developing a superconducting undulator
A team of Argonne researchers has authored a paper in Physical Review ST Accelerators and Beams on the journey of building a superconducting undulator (SCU) with an emphasis on magnetic design, expected heat loads and cooling system design.
The team describes the results of a stand-alone cool-down test, including magnetic measurements and cryogenic behavior of the SCU. A review is given of operating the SCU in the APS storage ring, presenting the observed heat loads in the SCU, the undulator performance and its effect on the electron beam.
A decade-long effort at the Advanced Photon Source (APS) on development of superconducting undulators culminated in December 2012 with the installation of the first Superconducting Undulator (SCU) into Sector 6 of the APS storage ring. The device was commissioned in January 2013 and has been in user operation since. This paper presents the magnetic and cryogenic design of the SCU together with the results of stand-alone cold tests. The initial commissioning and characterization of SCU as well as its operating experience in the APS storage ring are described.
Y. Ivanyushenkov, K. Harkay, M. Abliz, L. Boon, M. Borland, D. Capatina, J. Collins, G. Decker, R. Dejus, J. Dooling, C. Doose, L. Emery, J. Fuerst, J. Gagliano, Q. Hasse, M. Jaski, M. Kasa, S. H. Kim, R. Kustom, J. C. Lang, J. Liu, E. Moog, D. Robinson, V. Sajaev, K. Schroeder, N. Sereno, Y. Shiroyanagi, D. Skiadopoulos, M. Smith, X. Sun, E. Trakhtenberg, I. Vasserman, A. Vella, A. Xiao, J. Xu, A. Zholents and E. Gluskin, “Development and Operating Experience of a Short-period Superconducting Undulator at the Advanced Photon Source,” Physical Review ST Accelerators and Beams 18, 040703. DOI: 10.1103/PhysRevSTAB.18.040703, Published April 29, 2015.