Keyword: insertion-device
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WEPOB57 Magnetic Optimization of Long EPUs at NSLS-II ion, undulator, MMI, insertion 1018
  • C.A. Kitegi, P.L. Cappadoro, O.V. Chubar, T.M. Corwin, H.C. Fernandes, D.A. Harder, D.A. Hidas, W. Licciardi, M. Musardo, J. Rank, C. Rhein, T. Tanabe
    BNL, Upton, Long Island, New York, USA
  The Soft Inelastic X-ray scattering (SIX) and the Elec-tron-Spectro-Microscopy (ESM) are two beamlines under construction at National Synchrotron Light Source-II (NSLS-II). The specifics of these two beamlines requested the use of two long Advanced Planar Polarized Light Emitter-II (APPLE-II) undulators, as a source that provides circularly and vertically polarized radiation. Thus we designed 3.5 m and 2.7m long APPLE-II type undulators for SIX and ESM. The NSLS-II ID group is responsible for the magnetic optimization of these two long undulators. In this paper, we first summarize the APPLE-II magnetic and mechanical design. Then, we discuss the magnetic performance of the first APPLE-II achieved with the shimming performed at BNL.  
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THPOA60 Status of PLSII Operation ion, insertion, impedance, operation 1223
  • T.-Y. Lee
    PAL, Pohang, Kyungbuk, Republic of Korea
  As the upgrade of PLS, PLSII is a 3 GeV light source in 12 super-periods (281.8 m circumference) with 5.8 nm design emittance and can store electron beam up to 400 mA with 3 superconducting RF cavities. Its most unique characteristic is that it has a short straight section and a long straight section for each cell (24 straight sections) and up to 20 insertion devices can be installed. But, as the installed insertion devices, particularly in-vacuum insertion devices, are sources of high impedance, these are quite challenging for high current operation. Current status of PLSII operation and future plans are described in this paper.  
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THPOA69 Evolution of the Design of the Magnet Structure for the APS Planar Superconducting Undulators ion, undulator, photon, insertion 1245
  • E. Trakhtenberg, Y. Ivanyushenkov, M. Kasa
    ANL, Argonne, Illinois, USA
  Funding: Work supported by the U.S. Department of Energy, Office of Science, under Contract No. DE-AC02-06CH11357
Abstract A number of superconducting planar undulators (SCU) with different pole gaps and periods were designed, manufactured, and successfully operated at the Advanced Photon Source (APS) storage ring. A key component of the project is the precision machining of the magnet structure and the precision of the coil winding. The design of the magnet core had a number of modifications during the evolution of the design in order to achieve the best magnetic performance. The current design of the magnet structure is based on the assembled jaws with individual poles, while previous designs utilized solid cores with machined coil grooves. The winding procedure also changed from the first test cores to the current final design. Details of the magnet structure's design, manufacturing, winding and jaw assembly, and changes made from the first prototype system to the production unit, are presented.
[1] Status of the First Planar Superconducting Undulator for the Advanced Photon Source, Y. Ivanyushenkov, E.M. Trakhtenberg et al., Proc. in IPAC-2012, New Orleans, May 2012.
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