THE 1-3 CYCLOTRON SYSTEM V.G. Mudrolyubov # , I.N. Vasilchenko, Yu.N. Gavrish, A.V. Galchuck, S.V. Grigorenko, V.I. Grigoriev, M.T. Kozienko, L.E. Korolev, A.N. Kuzhlev, Yu.I. Stogov, V.I. Ponomarenko, A.P. Strokach, S.S. Tsygankov, V.D. Shiltsev, D.V. Efremov Scientific Research Institute of Electrophysical Apparatus, Saint Petersburg, Russia Nebojsa Neskovic, Petar Belicev, Aleksandar Dobrosavljevic, Velibor Vujovic, The Vinca Institute of Nuclear Sciences, Belgrade, Serbia Abstract -3 cyclotron system has been designed to be installed in the Vinca Institute of Nuclear Sciences, Belgrade, Serbia. This system will be operated in the laboratory of nuclear-physical methods of the elemental analysis. The system includes a compact cyclotron and a system for beam shaping with specified energy characteristics. The cyclotron ensures the acceleration of negative hydrogen ions up to energy in the range from 1 to 3 MeV and a beam of protons is extracted by stripping on a thin carbon foil. The beam-shaping system ensures the beam of protons with a spectrum width not more than 0.1%. The main unit of the beam-shaping system is a the equipment of the cyclotron system has been manufactured and tests have been carried out on test facilities in the D.V. Efremov Institute. Installation will be performed in 2012. The 1-3 cyclotron system has been designed at the D.V. Efremov Scientific Research Institute of Electrophysical Apparatus (NIIEFA), St. Petersburg with an active participation of specialists from the Vinca Institute of Nuclear Sciences, Belgrade, Serbia. The system will ensure effective technological facilities necessary to carry out analytical research in the Vinca Institute, in particular RBS, PES, NRA PIXE spectroscopies. Strict requirements are imposed for parameters of accelerated proton beams: the energy range should be from 1 to 3 MeV, spectrum width no more than 0.1%, accuracy of energy setting not worse than 1 keV and current ranging from 10 to 100 nA. To attain the aforementioned parameters, we have chosen the version of the system consisting of a compact cyclotron with a beam-forming system (Fig. 1) and systems of power supply, automatic control, vacuum pumping and water cooling. The compact cyclotron is intended to accelerate negative hydrogen ions. An extraction by stripping on a thin carbon foil allows a proton beam with a final energy up to 1-3 MeV to be delivered. The current of the extracted beam of comprises the following units and elements: an electromagnet with a vacuum chamber, resonance system, probes and stripping device, external injection system and high-frequency generator. The beam-forming system is designed to ensure beam parameters, which are not typical for cyclotrons. The beam-forming system includes a matching magnet and switching magnets, doublet of quadrupole lenses, correcting electromagnets and magnetic analyzer. Figure 1: -3 with a beam- forming system. The major part of the cyclotron is a four-sector shielding-type electromagnet (Fig. 2). The electromagnet is 1400 mm in dia, pole diameter is 600 mm and average induction is 0.98 T. Gap hills/values are 50/100 mm. The maximum acceleration radius for the 3 MeV energy is 250 mm. The power consumption of the magnet is 5.2 kW; its mass is 6.5 tons. The upper beam of the magnet can be moved upward up to 500 mm. Figure 2: The magnet of the cyclotron. ___________________________________________ # Mudrolubov_VG@luts.niiefa.spb.su Proceedings of RUPAC2012, Saint|-|Petersburg, Russia FRACH03 Medical and industrial applications ISBN 978-3-95450-125-0 191 Copyright c ○ 2012 by the respective authors — cc Creative Commons Attribution 3.0 (CC BY 3.0)