Status of the VEPP-4

The status of the VEPP-4 electron-position storage ring after its start-up and conducting experiments on determination of psi- and psi-meson masses is described. The 12-15 mA beam current acceleration mode was performed. When the MD-1 detector, was installed into the central colliding point a new version for rectilinear gap beam optics was realized. In this version the number of points with the number of points with the high β function was decreased. The VEPP-4 luminosity was nearly doubled and equals 2x1030 cm-2s-1. The 50% polarization was obtained by introducing a system of suppression of radial and vertical betatron oscillations coupling. Development of polarization methods in the VEPP-4, methods of measuring the degree of polarization and utilization of the standard method of beam depolarization by slow scanning of frequency, perturbing spin motion, permitted to carry out storage ring energy calibration according to the beam depolarization moment and measure the psi-meson mass, that turned out to be 9459.7+-0.6 MeV. The methods of production of longitudinally polarized beams and problems connected with monochromatization of interaction energy are under development