Author: Kulipanov, G.N.
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MOCOZBS03
 Recent Advances in Terahertz Photonics and Spectroscopy at Novosibirsk Free Electron Laser  
 
  • Y. Choporova
    BINP, Novosibirsk, Russia
  • V.V. Gerasimov, B.A. Knyazev
    NSU, Novosibirsk, Russia
  • Ya.V. Getmanov, B.A. Knyazev, G.N. Kulipanov, O.A. Shevchenko, N.A. Vinokurov
    BINP SB RAS, Novosibirsk, Russia
  
  The Novosibirsk free electron laser facility (NovoFEL) operates in the spectral range from 5 to 240 micrometer. High power, narrow linewidth and frequency tunability enable a wide variety of experiments. NovoFEL has eleven user stations open to local and external users. In this paper, we survey selected experiments in photonics performed recently at the facility, such as ellipsometry, holography, surface plasmon polaritons study, pump-probe spectroscopy, and the investigation of the Talbot effect. Additionally, this paper will focus on another field of terahertz (THz) photonics, the transformation of (FEL) radiation into modes different from a Gaussian. Optical elements for intense THz waves differ from classical optical elements. Diffractive optical elements (DOEs) become beneficial for beam manipulation. For instance, in biological experiments a uniform irradiation of substances might be necessary; beams with radial polarization may be required in experiments on the generation of plasmons on wires; pencil-like or "nondiffractive" Bessel beams could be applied to radioscopy of extended objects, etc. A brief overview of THz beam transformations with DOEs will be given.
All experiments were carried out using equipment of the Siberian Center for Synchrotron and Terahertz Radiation. The authors are grateful to the NovoFEL team for continuous support of the experiments. 		 
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THCOZBS01
 Novosibirsk ERL injector  
 
  • O.A. Shevchenko, V.S. Arbuzov, K.N. Chernov, I.V. Davidyuk, O.I. Deichuli, E.N. Dementyev, B.A. Dovzhenko, Ya.V. Getmanov, A.A. Kondakov, V.R. Kozak, E.V. Kozyrev, S.A. Krutikhin, G.N. Kulipanov, E.A. Kuper, I.V. Kuptsov, G.Y. Kurkin, A.S. Matveev, L.E. Medvedev, S.V. Motygin, V.N. Osipov, V.K. Ovchar, V.M. Petrov, A.M. Pilan, V.M. Popik, V.V. Repkov, T.V. Salikova, M.A. Scheglov, I.K. Sedlyarov, S.S. Serednyakov, A.N. Skrinsky, S.V. Tararyshkin, V.G. Tcheskidov, A.G. Tribendis, N.A. Vinokurov, V. Volkov
    BINP SB RAS, Novosibirsk, Russia
  • I.V. Davidyuk, Ya.V. Getmanov, E.V. Kozyrev, S.S. Serednyakov, N.A. Vinokurov
    NSU, Novosibirsk, Russia
  • A.G. Tribendis
    NSTU, Novosibirsk, Russia
  
  The Novosibirsk ERL is the first in the world multi-orbit ERL with high average current. It is used as a source of electron bunches for three powerful FEL-oscillators which operate in CW mode. In present configuration the ERL Injector comprises a 300-kV electrostatic gun with thermionic cathode, as well as one bunching and two accelerating cavities separated by the drift space which is used for bunch compression. In near future the new RF gun will be added to this configuration. The basic requirement for the injector is to provide beam parameters necessary for FEL operation. These parameters include bunch charge more than 1 nQ and repetition rate about 10 MHz. Very small emittance and very short pulse duration are not required in our case because of long FEL radiation wavelength and low RF frequency of the main linac. We present detailed description of the injector setup and results of beam parameters measurements. The measured parameters are compared with simulation results. We also discuss future upgrade which includes installation of the new RF gun.  
slides icon Slides THCOZBS01 [18.483 MB]  
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