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Baryshevsky, V. G.

Paper Title Page
TUPPH012 Experimental Study of a Volume Free Electron Laser with a ''Grid'' Resonator 331
 
  • V. G. Baryshevsky, N. A. Belous, A. Gurinovich, A. S. Lobko, P. V. Molchanov, V. I. Stolyarsky
    Belarussian State University, Scientific Research Institute of Nuclear Problems, Minsk
  
  Volume Free Electron Laser (VFEL) uses volume distributed feedback formed by diffraction gratings with different patterns*,**. First lasing of a Volume Free Electron Laser with a ''grid'' resonator, built from periodically strained metallic threads, was observed in***. Structures of this kind are often referred to as photonic crystals. Experiments with ''grid'' VFEL are carried out. Radiation is detected in the frequency range about 10 GHz. Backward wave regime is tested. Dependence of the generation threshold on the resonator length is investigated. It is demonstrated that use of volume resonators of the described type provides to weaken requirements for the electron beam shape and guiding precision. Radiation frequency tuning, which is an advantage of VFEL, can be achieved in such a structure by change of threads tilt to the electron beam velocity.

* V. G.Baryshevsky, K. G. Batrakov, A. A. Gurinovich et al., NIM 483A (2002) 21. ** V. G. Baryshevsky, NIM A 445 (2000) 281. *** V. G. Baryshevsky et.al. LANL e-print archive: physics/0409125

 
TUPPH013 Electrodynamical Properties of a Volume Free Electron Laser with a ''Grid'' Resonator 335
 
  • A. Gurinovich, V. G. Baryshevsky
    Belarussian State University, Scientific Research Institute of Nuclear Problems, Minsk
  
  The electrodynamical properties of a crystal-like artificial periodic structure (a photonic crystal), formed by a periodic structure built from the metallic threads ("grid" volume resonator) is considered. Peculiarities of passing of electromagnetic waves with different polarizations through such a volume resonator are discussed. It is shown that the frequency spectrum of diffraction (Smith-Purcell) radiation is such a resonator appears splitted due to the complex anomalous Doppler effect. Specific features of a Volume Free Electron Laser (VFEL)*,** with a ''grid'' resonator for different frequency ranges are analyzed. Possibility of development of tunable radiation source in THz range is particularly discussed. The equations, which describe lasing of VFEL with a ''grid'' resonator (photonic crystal)***, are obtained. Estimation of the resonator durability to the heating by the electron beam is done.

* V. G.Baryshevsky, K. G. Batrakov, A. A. Gurinovich et al., NIM 483A (2002) 21. ** V. G. Baryshevsky, NIM A 445 (2000) 281. *** V. G. Baryshevsky et.al. LANL e-print archive: physics/0409125