Slow beam extraction from the Nuclotron

Experiments on beam extraction from the Nuclotron, a superferric heavy ion synchrotron, were carried out last year and in March, 2001. The resonance Qx=20/3, used for a horizontal betatron amplitude growth, provides a beam entering the electrostatic septum deflector, where it obtains an initial deflection to avoid losses on the septum of the Lambertson Magnet. The latter bends the beam in the vertical plane to the level of the experimental halls. An extraction coefficient of about 70% and a spill time of 0.4 s were obtained in the first experiments performed at the deuteron beam energy from 200 MeV/amu to 1.5 GeV/amu. Then, experiments on irradiation with C⁺⁶ and Mg⁺¹² beams were performed on the external targets. The work, which permits one to improve the parameters of the extracted beam up to the projected ones, is discussed