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Karataev, P.V.

Paper Title Page
MONO07

 Generation Of Soft X-Ray Pulse Using Thomson Scattering Of Coherent Diffraction Radiation By A Short Electron Bunch 

  • A.P.Potylitsyn, L.G.Sukhikh, A.V.Kostousov
    Tomsk Polytechnic University, Tomsk, Russia
  • J.Urakawa, A.Aryshev
    KEK, Tsukuba, Japan
  • S. Boogert, P.V.Karataev
    John Adams Institute at RHUL UK

The processes of generation of coherent diffraction radiation (CDR) by a short electron bunch of 45-MeV S-band electron accelerator and it’s Thomson scattering on one of the subsequent bunches have been simulated. Backward CDR is emitted when electron bunch with population and length passes in a vicinity of a conducting target along the direction of specular reflection. In the wavelength region all electrons in a bunch emit coherently and CDR intensity becomes proportional to the square of a bunch population. For a target with inclined angle 45o CDR beam may be extracted from the accelerator chamber at right angle to an electron beam. For this geometry we calculated CDR spectral-angular distributions from concave targets with different profiles which allow to focus radiation at different distances. If the direction of specular reflection coincides with electron path it is possible to use a concave target with a focal distance providing the maximal overlapping of CDR pulse and a subsequent electron bunch. In this case one may obtain hard radiation in forward direction for the photon energy range as a result of Thomson scattering. The yield of hard photons is proportional to [1]. For the following accelerator parameters [2]: Beam energy - 45 MeV; Charge/bunch - 500 pC; Beam emittance - 3 mm mrad; Bunch length - 0.3 mm. we estimated the efficiency of considered schemes for obtaining of radiation and soft X-ray radiation ( eV) with duration ps.

REFERENCES [1] A.P. Potylitsyn, Physical Review E, vol. 60, 1999, p. 2272. [2] H. Koichiro et al., Nucl.Instrum. and Methods A, 2006 (to be published).

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