Author: Lee, S.H.
Paper Title Page
TUPLM33 Optimization of Beam Parameters for UEM with Photo-Emission S-Band RF Gun and Alpha Magnet 440
SUPLM24   use link to see paper's listing under its alternate paper code  
 
  • H.R. Lee, P. Buaphad, I.G. Jeong, Y. Joo, Y. Kim
    University of Science and Technology of Korea (UST), Daejeon, Republic of Korea
  • P. Buaphad, I.G. Jeong, Y. Joo, Y. Kim
    KAERI, Daejon, Republic of Korea
  • B.L. Cho
    KRISS, Daejeon, Republic of Korea
  • M.Y. Han, J.Y. Lee, S.H. Lee
    Korea Atomic Energy Research Institute (KAERI), Daejeon, Republic of Korea
  • H. Suk
    GIST, Gwangju, Republic of Korea
  
  Ultrafast Electron Microscopy (UEM) is a powerful tool to observe ultrafast dynamical processes in sample materials at the atomic level. By collaborating with KRISS and GIST, the future accelerator R&D team at KAERI has been developing a UEM facility based on a photo-emission S-band (=2856 MHz) RF gun. Recently, we have added an alpha magnet in the beamline layout of the UEM to improve beam qualities such as emittance, divergence, energy spread, and bunch length. To achieve high spatial and time resolutions, we have been optimizing those beam parameters and other machine parameters by performing numerous ASTRA and ELEGANT code simulations. In this paper, we describe our ASTRA and ELEGANT code optimizations to obtain high-quality beam parameters for the UEM facility with a photo-emission S-band RF gun and an alpha magnet.  
poster icon Poster TUPLM33 [0.931 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-NAPAC2019-TUPLM33  
About • paper received ※ 30 August 2019       paper accepted ※ 19 November 2019       issue date ※ 08 October 2019  
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TUPLH17 Design Study of Low-Level RF Control System for CW Superconducting Electron Linear Accelerator in KAERI 512
 
  • S.H. Lee, J.Y. Lee
    Korea Atomic Energy Research Institute (KAERI), Daejeon, Republic of Korea
  • P. Buaphad, I.G. Jeong, Y.J. Joo, H.R. Lee
    University of Science and Technology of Korea (UST), Daejeon, Republic of Korea
  • M.-H. Chun, I.H. Yu
    PAL, Pohang, Republic of Korea
  • Y. Kim
    KAERI, Jeongeup-si, Republic of Korea
  
  Korea Atomic Energy Research Institute (KAERI) has been operating a 20 MeV superconducting RF linear accelerator (SRF LINAC) to conduct research on atom/nuclear reaction using neutron Time-Of-Flight (nTOF). It can accelerate electron beams up to 20 MeV with 1 kW continuous wave (CW) operation mode. Unfortunately, this machine has been aged over 15 years that brings about considerably difficulty in normal operation due to the performance degradation of sub-systems. To improve the operation condition of 20 MeV SRF LINAC, we has been carrying out an upgrade project with replacement and repair of old sub-systems from 2018. This paper describes a design study of Low-Level RF (LLRF) feedback system to raise the stability and acceleration efficiency of the electric field generated in the superconducting RF cavity structure in 20 MeV SRF LINAC.  
poster icon Poster TUPLH17 [0.644 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-NAPAC2019-TUPLH17  
About • paper received ※ 30 August 2019       paper accepted ※ 04 September 2019       issue date ※ 08 October 2019  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)