| Paper | Title | Page |
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| WEBOR01 | The C-80 Cyclotron System. Technical Characteristics, Current Status, Progress and Prospects. | 106 |
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| A C-80 cyclotron system is intended to produce proton beams with an energy ranging from 40 up to 80 MeV and current up to 200 mkA. The beams with these parameters will be used for commercial production of a wide spectrum of isotopes for medicine, proton radiation therapy of eye diseases and superficial oncologic diseases as well as for fundamental and applied researches. Manufacturing and installation of the cyclotron equipment and first section of the system for the beam transport to remote targets have been finished. Physical start-up of the cyclotron has been realized. In future, the C-80 cyclotron is supposed to be used as an injector of the C-230 synchrotron, which serves for additional acceleration of the extracted proton beam to energies of the order of 230 MeV. This will allow the Bragg's peak-based treatment procedures to be applied in the proton therapy of oncologic patients. | ||
| WEBOR02 | Some Design Features of the 80 MeV H− Isochronous Cyclotron at Gatchina | 109 |
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| To minimize the expenditures while designing the cyclotron an attempt was made to use at most the existing synchrocyclotron infrastructure, i.e. the building with the radiation shielding, the bridge crane for 30 tones, the electric power, water cooling, ventilation systems, etc. The iron yoke of the existing synchrocyclotron magnet model is used for a magnet system. The special magnetic structure with very low value of the flatter 0.025 and extremely high spiral angle about 60 degree in the radii range from 0.3 up to 0.9 m was developed to provide acceleration of H-minus ions up to energy 80 MeV in the magnet with extraction radius 0.9 m. Special attention was paid to thoroughly study effects of the highly spiraled structure: decrease of the flatter with introduction of the spiral angle, discrepancy between the magnetic and geometrical spiral angles, the spiral angle inefficiency in the cyclotron central region. | ||
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Slides WEBOR02 [1.952 MB] | |
| WEPPC015 | Highly Accurate 3D Modeling of the C-80 Isochronous Cyclotron Magnetic Structure | 475 |
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| The very complicated magnetic structure with extremely high spiral angle and set of 17 correction shim types in each of 8 sectors is used in the H-minus ion isochronous cyclotron C-80. The 3D code MERMAID was applied to optimize geometry of the sectors and shims in the hill and value region. A precision finite-element model allows take into account the iron non-linear effects and the detailed magnet geometry. MERMAID makes use about 20.5 millions nodes and provides magnetic field calculation accuracy in 10-20 Gs. The integral magnetic field parameters (isochronism, transversal motion frequency, H-minus ion electromagnetic dissociation) have been optimized by using the trajectory analyses. Program provides the significant reduction the time and efforts for the determination the necessary shims set in comparison with trial-and-error method. | ||
WEPPD051 |
Stripper Extraction from the H-minus Ions Cyclotron C-80 | |
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| The design and beam optics calculation of the extraction system for H-minus ions cyclotron in Gatchina are presented. The foil positions which provide extraction of beams in the energy range 40-75 MeV into existing extraction window are determined. The optics parameters of the corrector-magnet to match extracted beams to the existing beam transport line are examined. | ||