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Amatuni, G. A.

Paper Title Page
WEPC026 Laser – Beam Interaction and Calculation of the Sliced Bunch Radiation Spectra for the SLS FEMTO Beam Line 2040
 
  • D. K. Kalantaryan, G. A. Amatuni, V. M. Tsakanov
    CANDLE, Yerevan
  • P. Beaud, G. Ingold, A. Streun
    PSI, Villigen
 
  The FEMTO insertion at the Swiss Light Source (SLS) produces sub-ps X-ray pulses by modulating the electron energy in a slice of the bunch through interaction with a fs-laser. The electron energy modulation by the laser field in the wiggler magnet is studied analytically to calculate the radiation spectra from a sliced bunch. The analytical expressions for energy modulation and its envelope have been derived. The radiation spectra in the first magnet after the FEMTO insertion have been studied. The spectra of the coherent part of the radiation are determined using a Fourier transformation technique. For a Gaussian bunch the obtained results are compared with the tracking simulation study.  
THPC004 Chromatic and Wakefield Effects in PSI-XFEL Linac 2978
 
  • B. Grigoryan, G. A. Amatuni, V. M. Tsakanov
    CANDLE, Yerevan
  • R. J. Bakker, Y. Kim, M. Pedrozzi, J.-Y. Raguin
    PSI, Villigen
 
  Detailed knowledge about the wakefield and chromatic effects on electron beam emittance is an important issue to preserve the natural emittance of the beam in linear accelerators for FEL. The study of these two effects for beam and accelerator components imperfections in PSI-XFEL S-Band linear accelerator is presented. Emittance dilution caused by the beam coherent oscillations, accelerating section and quadrupole misalignments is analysed. The residual chromatic emittance dilution of the corrected trajectory is evaluated.