WEXOR03
PNPI, Gatchina, Leningrad District, Russia
PNPI, Gatchina, Leningrad District, Russia
NIIEFA, St. Petersburg, Russia
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WEXOR03 |
Status of PNPI Proton Synchrocyclotron | |
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| The proton synchrocyclotron (SC) for acceleration of protons up to 1 GeV kinetics energy is operating in PNPI during a period of 2000-2500 hour per year. SC is used as well for the nuclear as for applied physics researches. In resent years there is a trend to develop the applied program, which includes proton therapy, investigation of the new materials by using spin-rotation method, radiation test on proton beams of the electronic components under licenses from manufacturers. The unique for Europe neutron beam with quasi-atmospheric spectrum for radiation test electronics for aviation and cosmos have been developed. New nuclear medicine program including modernization of the existing 1000 MeV proton therapy, construction of new H-minus 80 MeV isochronous cyclotron for the medicine isotopes production and organization the melanoma treatment facility is in a progress. | ||
| 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] | |