Syresin, E.
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CENTERS OF HADRON THERAPY ON THE BASIS OF CYCLOTRONS |
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E. Syresinª Joint Institute for Nuclear Research, Dubna, Russia Abstract Hadron therapy hospital centers have become wide spread in the world during the last decade. These centers were created mainly on basis of the cycling accelerators such as cyclotrons and synchrotrons. Now there are several proposals of the proton centers on the basis of linear accelerators. In this report we discuss features, advantages and disadvantages of hadron therapy centers on the basis of cyclotron equipment. Both proton and carbon therapy techniques are considered in this report. It is proposed to construct a cyclotron-based proton therapy center in Dubna. The medical cyclotron for this center is to be constructed by JINR-IBA collaboration this year. The cyclotron beam test experiments are plan for 2009. After that the medical cyclotron could be used for the Dubna hospital center and contribute to promoting the proton therapy in the future Russian centers. ª – corresponding author |
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DIAGNOSTICS OF ULTRASHORT ELECTRON BUNCHES DEVELOPED AT JINR |
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O. Brovko, D. Kharlamov, O. Kozlov, S. Kostromin, R. Makarov, E. Matyushevskiy, N. Morozov, E. Syresinª, B. Zalikhanov, M. Yurkov Joint Institute for Nuclear Research, Dubna, Russia Abstract Different methods for diagnostic of ultrashort electron bunches are developed at JINR-DESY collaboration within the framework of the FLASH and XFEL projects and JINR participation in the ILC project. The main peculiarity of these accelerator complexes is related to formation of ultrashort electron bunches with r.m.s. length 20÷300 μm. Novel diagnostics is required to provide femtoscale time resolution in the modern FEL like FLASH and future XFEL and ILC projects. Photon diagnostics developed at JINR-DESY collaboration for ultrashort bunches are based on calorimetric measurements and detection of undulator radiation. The MCP based radiation detectors are effectively used at FLASH for pulse energy measurements. The infrared undulator constructed at JINR and installed at FLASH is used for longitudinal bunch shape measurements and for two-color lasing provided by the FIR and VUV undulators. A special magnetic spectrometer is planning to be used in ILC for measurements of average electron energy in each bunch. The first test spectrometer measurements were performed within the JINR-DESY-SLAC collaboration. ª – corresponding author |
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INCOHERENT VERTICAL ION LOSSES AT COOLING STACKING INJECTION |
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A. Smirnov, E. Syresinª Joint Institute for Nuclear Research, Dubna, Russia Abstract The efficiency of the cooling-stacking injection depends on two parameters: the cooling-accumulation efficiency and the ion lifetime. The lifetime of newly injected ions is usually smaller than the stack lifetime of high intensity ion beams. The incoherent losses of newly injected ions are related to multiscattering on residual gas atoms and vertical heating caused by ion stack noise. The short lifetime of newly injected ions restricts the efficiency of the cooling stacking injection. The experimental dates, analytical estimations and BETACOL simulations of vertical incoherent ion losses at cooling stacking injection are discussed. ª – corresponding author |
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