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Lurie, Yu.

Paper Title Page
MOPPH038 Experimental and 3D Simulation Studies of the Spectral Characteristics of Electrostatic Accelerator FEL with Space Charge Dominated Transport  
 
  • A. Gover, M. Volshonok
    University of Tel-Aviv, Faculty of Engineering, Tel-Aviv
  • Yu. Lurie
    CJS, Ariel
 
  One of the important properties of the FEL it is the ability to generate high power radiation within a wide frequency range. By varying the acceleration energy of the tandem electrostatic FEL in the range 1.3-1.44 MeV we tuned the FEL lasing radiation between 80GHz to 110GHz. The tuning range is limited by the resonator frequency dispersion one hand and the beam trajectories on the other hand. At low acceleration energies space charge effects make it difficult to keep the electron trajectories in the wiggler confined to the axis. Because of this and because of difficulty to keep optimal e-beam injection parameters into the wiggler, the oscillation threshold is reduced and the tuning range of the FEL is limited. The finite size of the e-beam inside the wiggler also has a reduction effect on the lasing frequency. The measured spectral tuning characteristics of the FEL matches well the results of FEL lasing 3-D simulation (with FEL3D). The electron trajectories and the beam transport were calculated with GPT simulations in the space charge dominated regime.  
WEPPH058 Modeling a RF Linac Based Short Pulse Waveguide FEL 487
 
  • Y. Pinhasi, Yu. Lurie
    CJS, Ariel
  • M. Tecimer
    NHMFL, Tallahassee, Florida
 
  We discuss modeling a highly slippage dominated short pulse, long wavelength rf linac based THz FEL in a waveguide cavity.