Keyword: synchro-cyclotron
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TUPSA31 Magnetic System of Isochronous Cyclotron F250 for Proton Therapy Applications cyclotron, proton, vacuum, focusing 103
  • Yu.G. Alenitsky, E. Samsonov
    JINR, Dubna, Moscow Region, Russia
  • N.L. Zaplatin
    JINR/DLNP, Dubna, Moscow region, Russia
  In the Laboratory of Nuclear Problems of the JINR the possibility of designing of the isochronous cyclotron F250 with the energy of protons 250 MeV on the basis of magnet with the diameter of pole 6 m, which is used for the synchro-cyclotron is examined. Synchro-cyclotron many years works for obtaining the protons with the energy 680 MeV and with the intensity of extracted beam 2.5 mkA. For the solution of medical problems the required energy of protons comprises not more than 250 MeV and depends on the depth of the tumor arrangement inside a patient. For determining the required energy of protons the information about the mean free path of protons in the correspondence for the position of Bragg's peak in each case is used. Necessary energy of protons is obtained by means of degrader system providing a retarding the extracted beam of protons with 680 MeV to 250 MeV and less. In this case the utilized for medical purposes intensity of beam does not exceed 50 nA. The proposed cyclotron F250 will make it possible to strongly decrease the electric power of magnet and to avoid the need of beam degradation from 680 MeV to 250 MeV. For creating the required magnetic field of the cyclotron F250 it is necessary to change the form of steel spiral shims and disks, located inside a vacuum chamber of synchro-cyclotron. The basic parameters of the magnetic system of the cyclotron F250 with the condition of retaining the vacuum chamber and the magnet yoke of synchro-cyclotron are given.  
WECA04 Accelerator Hadron Therapy Technique Developed at JINR cyclotron, proton, synchrotron, extraction 131
  • E. Syresin
    JINR, Dubna, Moscow Region, Russia
  Accelerator hadron therapy technique is one of applied researches realized at JINR. The JINR-IBA collaboration has developed and constructed the C235-V3 cyclotron for Dimitrovgrad hospital center of the proton therapy. Proton transmission in C235-V3 from radius 0.3m to 1.03 m is 72% without beam cutting diaphragms; the extraction efficiency is 62%. The main advantage of this cyclotron in comparison with serial commercial cyclotrons of IBA is related to higher current of the extracted beam. The cancer treatment is realized in JINR on the phasotron proton beam. More than 1000 patients were treated there. A project of the demonstration center of the proton therapy is discussed on base of a superconducting 250 MeV synchrocyclotron. The superconducting synchrocyclotron is planned to install instead of phasotron in Medical Technical Complex of DLNP. The project of the medical carbon synchrotron together with superconducting gantry was developed in JINR. The basis of this medical accelerator is the superconducting JINR synchrotron – Nuclotron. One important feature of this project is related to the application of superconducting gantry.  
slides icon Slides WECA04 [1.517 MB]  
WEPSB23 Set-up for Measurements of Delayed Neutron Characteristics in Interaction of Heavy Nuclei with Relativistic Protons of the Synchrocyclotron PINP Gatchina neutron, proton, detector, experiment 209
  • A.S. Egorov, V.F. Mitrofanov, V.M. Piksaikin, B.F. Samylin
    IPPE, Obninsk, Russia
  In the present paper the method and set-up for measurements of delayed neutron characteristics in interaction of heavy nuclei with relativistic protons are described. On the basis of this method the time dependence of delayed neutron activity has been measured from interaction of 238U sample with 1 GeV pulsed proton beam of the synchrocyclotron of the Petersburg Institute of Nuclear Physics, Gatchina. The measured data was analyzed in frame of 8-group precursor's model with a unified set of half-lives. Obtained results on the fractional yields of delayed neutrons are compared with the appropriate data from the fast neutron induced fission of 238U.  
WEPSB31 Project of Demonstration Center of the Proton Therapy at DLNP JINR proton, extraction, cyclotron, emittance 228
  • E. Syresin, G.A. Karamysheva, M.Y. Kazarinov, N.A. Morozov, G.V. Mytzin, N.G. Shakun
    JINR, Dubna, Moscow Region, Russia
  • J. Bokor
    STU, Bratislava, Slovak Republic
  JINR is one of the leading proton therapy research centers of the in Russia. The modern technique of 3D conformal proton radiotherapy was first effectuated in Russia in this center, and now it is effectively used in regular treatment sessions. A special Medico-Technical Complex was created at JINR on the basis of the phasotron used for proton treatment. About 100 patients undergo a course of fractionated treatment here every year. During last 14 years were treated by proton beams about more than 1000 patients . A project of the demonstration center of the proton therapy is discussed on base of a superconducting 250 MeV synchrocyclotron. The superconducting synchrocyclotron is planned to install instead of phasotron in Medical Technical Complex of DLNP. The new transport channel is designed for beam delivery to the JINR medical cabin.