Author: Chen, S.
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MOPWA056 Transverse Multi-Pass Beam Breakup Simulation for KEK ERL Light Source 248
 
  • S. Chen, N. Nakamura, M. Shimada, D. Zhou
    KEK, Ibaraki, Japan
  • S. Huang, K.X. Liu
    PKU, Beijing, People's Republic of China
  
  In this paper, the multi-pass BBU of such a high energy ERL is studied based on the simulation on a 3 GeV ERL light source proposed by KEK.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-MOPWA056  
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TUPWA063 FEL Enhancement by Microbuch Structure Made with Phase-Space Rotation 1570
 
  • M. Kuriki, Y. Seimiya
    HU/AdSM, Higashi-Hiroshima, Japan
  • S. Chen, K. Ohmi, J. Urakawa
    KEK, Ibaraki, Japan
  • S. Kashiwagi
    Tohoku University, Research Center for Electron Photon Science, Sendai, Japan
  • R. Kato
    ISIR, Osaka, Japan
  
  Funding: This work is partly supported by MEXT/JSPS KAKENHI (Grant-in-Aid for scientic research) 25390126, Japan.
FEL is one of the ideal radiation source over the wide range of wavelength region with a high brightness and a high coherence. Many methods to improve FEL gain has been proposed by introducing an active modulation on the bunch charge distribution. The transverse-longitudinal phase-space rotation is one of the promising method to realize the density modulation as the micro-bunch structure. Initially, a beam density modulation in the transverse direction made by a mechanical slit, is properly transformed into the density modulation in the longitudinal direction by the phase-space rotation. The micro-bunch structure made with this method has a large tunability by changing the slit geometry, the beam line design, and the beam dynamics tuning. For FEL, enegy chirp made by the emittance exchange and chromaticity made by this chirp should be properly corrected. Simulation results and possible applications are discussed. 		 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-TUPWA063  
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TUPWA072 Coherent Thomson Scattering Radiation Generated by using PEHG 1601
 
  • S. Chen, K. Ohmi, D. Zhou
    KEK, Ibaraki, Japan
  • S. Huang
    PKU, Beijing, People's Republic of China
  
  In this paper, we present the coherent Thomson scattering of a long wavelength laser with ultrashort electron slices. The ultrashort electron slices are generated by the longitudinal bunch density modulation method of PEHG. Coherent radiation with ultrashort pulse length is generated in EUV regime by this method.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-TUPWA072  
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