A proposal to install a superconducting wiggler magnet on the storage ring VEPP-3 for generation of the synchrotron radiation

Abstract A proposal is discussed to install a superconducting wiggler magnet on the storage ring VEPP-3 in order to shift the spectrum of the synchrotron radiation generated to a shortr wavelength range and to enhance the SR intensity. The basic considerations are presented for optioned wiggler [arameters aimed at the maximum brightness of the source in the range of λ ≈ 1 A . The characteristics of the SR beam generated by the wiggler have been calculated (i.e. total power radiated, spectral and angular distribution). A 20-pole wiggler design is presented with the length of 1 m, maximum magnetic field strength of 40 kGs, poles spaced by 16 mm and vertical aperture accessible for the electron beam of about 8 mm. The intended wiggler installation scheme in a storage ring straight section envisages the storage of electrons apart from the wiggler aperture using the complete admittance of the storage ring with the subsequent shift of the stored beam into the wiggler by means of the localized closed orbit distortion. The influence of the wiggler field on particles motion in the storage ring has been considered (e.g. closed orbit distortion, betatron oscillations frequency shift, contribution to the cubic nonlinearity etc.).