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A NEW INJECTION SYSTEM FOR KURCHATOV SOURCE OF SR |
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A. Anoshinª, E. Fomin, V. Korchuganov, Yu. Krylov, V. Kvardakov, S. Pesterev, S. Tomin, V. Ushkov Russian Research Centre Kurchatov Institute, Moscow, Russia Abstract The accelerator complex of the KCSR consists of 2.5 GeV main storage ring, 450 MeV booster storage ring and 80 MeV linac. A project of the complex modernization comprising new brighter optical lattices of main storage ring and new injection system were developed in KCSR. New optical lattices will allow to reduce natural beam emittance from present 100 nm∙rad to 18 nm∙rad. But due to significant decrease of dynamic aperture the efficiency of injection from the booster storage ring having big natural emittance will be drastically reduced. A new 2.5 GeV booster synchrotron (BS) with 50 nm∙rad emittance was developed to overcome this problems. It will be placed in the same tunnel with main ring. Modernization project provides for a possibility to increase injection energy from linac to BS from 80 MeV to 160 MeV by double electron bunches transition through linac structure. ª – corresponding author |
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CORRECTION OF THE CYCLOTRON RIC-30 MAGNETIC FIELD |
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Yu.G. Alenitckyª¹, E.V. Samsonov¹, A.F. Chesnov¹, S.A. Kostromin¹, D.V. Emeljanov², V.G. Kaplun², A.G. Suzikov², C.V. Jagolnikov², B.I. Rogozev³ ¹Joint Institute for Nuclear Research, Dubna, Russia ²Second Central Scientific Research Institute, Military Defense of Russian Federation, Tver, Russia ³Federal State Unitary Enterprise Research-And-Production Association V.G. Khlopin Radium Institute, Saint-Petersburg, Russia Abstract Cyclotron RIC-30 (development of SPA "D.V. Efremov Scientific Research Institute of Electrophysical Equipment" is in operation from 1993. RIC-30 is isochronous cyclotron with sector's focusing and one-dee (180 degree) RF system. Compact magnet has 150 cm pole diameter. Cyclotron is used for the production of the PET-isotopes using internal and extracted beam with maximal energy of protons ~28 MeV. At earlier periods of exploitation some parameters of cyclotron (beam intensity and energy) were in disagreement with designed ones. It was decided to carry out the magnetic field measurements to understand the causes of such misalignment. This was done in 2006. The results of the magnetic field measurements as well as dynamics characteristics of the accelerated beam are presented in the paper. Central steel plug with one unsymmetrical hole for the ions source was replaced by the same one with two symmetrical holes. The new plug doesn't cause a presence of the 1st harmonic of the magnetic field in the cyclotron center. This leads to the beam energy grow up at the extraction radii due to decrease of the coherent amplitudes in the accelerated beam. Change of the magnetic field parameters in the cyclotron center for the beam intensity increase is under discussion as well. ª – corresponding author |
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FOUR-QUADRANT POWER SUPPLIES FOR STEERING ELECTROMAGNETS FOR ELECTRON-POSITRON COLLIDER |
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O.V. Belikovª, V.R. Kozak, A.S. Medvedko Budker Institute of Nuclear Physics Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia Abstract Specialized power supplies for electromagnets for accelerators and charged particle storage rings have been designed and manufactured at Budker Institute of Nuclear Physics for many years [1]. It turned out to be optimal to divide power supplies for correction elements into two groups according to their output parameters. This work presents two types of power supplies for steering magnets with a maximum output current of ±6À (MPS-6) and ±25À (MPS-25). The power supplies are manufactured under the Switch Mode Technology in the "Euromechanics" standard with application of up-to-date components. ª – corresponding author |
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POWERFUL ELECTRON ACCELERATOR ELV-12 FOR ECOLOGICAL APPLICATIONS: POWER SUPPLY AND CONTROL |
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P.I. Nemytovª, J.I. Golubenko, N.K. Kuksanov Budker Institute of Nuclear Physics Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia Abstract Based on the transistor two-phase frequency converter the power supply system of ELV-12 accelerator with an extracted beam power up to 400…500 kW is discussed. The problems arising at beam extracting into atmosphere through two parallel titan foils are studied. Method of independent centering of beam on the each foil is shown. Methods of independent measurements, stabilization and regulation of beam currents in several accelerating tube fed from one high-voltage source are revised. ª – corresponding author |
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