Author: Cho, M.-H.
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TUPRO098 Design and Test of Dipole and Quadrupole Magnets for PAL-XFEL 1271
 
  • H.S. Suh, M.-H. Cho, Y.-G. Jung, H.-S. Kang, D.E. Kim, I.S. Ko, H.-G. Lee, S.B. Lee, B.G. Oh, K.-H. Park
    PAL, Pohang, Kyungbuk, Republic of Korea
  
  PAL-XFEL, currently under construction in Pohang, Korea, will consist of a 10 GeV linac, three hard X-ray branches and two soft X-ray branches. As the first phase of this project, one hard X-ray (HX1) and one soft X-ray (SX1) branches will be constructed. This facility requires 6 different families of dipole magnets, and 11 families of quadrupole magnets included steering functions. We are designing these magnets with the water cooling or the heat sink system now. In this presentation, we describe the modified design of the magnets for efficient manufacturing, and the magnetic and thermal analysis with the test results.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-TUPRO098  
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TUPME059 Longitudinal Bunch Shaping with a Double Dogleg based Emittance Exchange Beam Line 1506
 
  • G. Ha, M.E. Conde, W. Gai, C.-J. Jing, K.-J. Kim, J.G. Power, A. Zholents
    ANL, Argonne, Illinois, USA
  • M.-H. Cho, G. Ha, W. Namkung
    POSTECH, Pohang, Kyungbuk, Republic of Korea
  • C.-J. Jing
    Euclid TechLabs, LLC, Solon, Ohio, USA
  
  Funding: Work supported by High Energy Physics, Office of Science, US DOE.
A new program is under development at Argonne National Laboratory (ANL) to use an emittance exchange (EEX) beamline to produce longitudinally shaped electron bunches. While the ultimate goal is to generate triangular shapes for high transformer ratio wakefield acceleration we are also exploring, in general, the capability of the double dogleg EEX beamline to control the bunch shape. We are studying effects that degrade the quality of the longitudinal current profile including: non-uniform particle distribution, emittance, the deflecting cavity thick-lens effect, 2nd order effects, space charge effects and coherent synchrotron radiation effects. We will present the double dogleg EEX beamline layout and the diagnostic design as well as give a progress report on the experimental status of the program. 		 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-TUPME059  
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WEPRO039 Status of PAL-XFEL Undulator Program 2029
 
  • D.E. Kim, H.-S. Kang, W.W. Lee, K.-H. Park
    PAL, Pohang, Kyungbuk, Republic of Korea
  • M.-H. Cho, I.S. Ko
    POSTECH, Pohang, Kyungbuk, Republic of Korea
  • S. Karabekyan, J. Pflüger
    XFEL. EU, Hamburg, Germany
  
  Pohang Accelerator Laboratory (PAL) is developing 10 GeV, 0.1 nm SASE based FEL for high power, short pulse X-ray coherent photon sources named PAL-XFEL. At the first stage PAL-XFEL needs two undulator lines for photon source. PAL is developing undulator magnetic structure based on EU-XFEL design. Recently, the hard X-ray undulator changed its minimum magnetic gap to 8.3 mm from the previous 7.2 mm to alleviate the wake field impact, and to increase the allowances for the re alignment. Accordingly, the period is also changed from 24.4 mm to 26.0 mm to generate 0.1 nm at 10 GeV electron energy. In this report, the modification efforts and the progress on the prototyping of hard x-ray undulator system will be presented.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-WEPRO039  
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