Author: Pflueger, J.     [Pflüger, J.]
Paper Title Page
WEPOY001 First Field Integral Measurement Campaign for Air Coil 2991
  • Z. Zhao, B. Du, Q.K. Jia
    USTC/NSRL, Hefei, Anhui, People's Republic of China
  • S. Karabekyan, J. Pflüger, M. Yakopov
    XFEL. EU, Hamburg, Germany
  For the operation of the air coils, which are needed for the undulator segments of the European x-ray free-electron laser (E-XFEL), precise conversion constants are needed to properly convert excitation current to steering strength. This paper describes the measurement of all 200 air coils, needed for this purpose using the short moving wire (MW) system. A LabView program was developed to measure the distribution of first field integral of both vertical (By) and horizontal (Bz) magnetic field components in the median plane of an air coil automatically. The program is an adaptation of the existing program, which was used to characterize magnetic properties of the phase shifters (PS). Before doing the measurements the new program automatically finds the centers of By and Bz components, which are found to match with the geometrical centers with sufficient accuracy. After the measuring procedure is complete, the results are presented as graphics output and final tables. It shows that the measurement results can fully meet the design requirements of E-XFEL. For all measurements the excitation current of the coils was set to 1 Ampere.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-WEPOY001  
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THPOW045 Development of PAL-XFEL Undulator System 4044
  • D.E. Kim, Y.-G. Jung, H.-S. Kang, I.S. Ko, H.-G. Lee, S.B. Lee, W.W. Lee, B.G. Oh, K.-H. Park, H.S. Suh
    PAL, Pohang, Kyungbuk, Republic of Korea
  • J. Pflüger
    XFEL. EU, Hamburg, Germany
  Pohang Accelerator Laboratory (PAL) is developing a 0.1 nm SASE based FEL based on 10 GeV S-band linear accelerator named PAL-XFEL. At the first stage, PAL-XFEL needs two undulator lines for photon source. The hard X-ray undulator line requires 20 units of 5 m long hybrid-type conventional planar undulator and soft X-ray line requires 7 units of 5 m long hybrid type planar undulators. PAL is developing undulator magnetic structure based on EU-XFEL concepts. In this report, the results of final pole height tuning results, and magnetic measurement results will be presented.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-THPOW045  
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