• P. Belicev, N. Neskovic, M. Rajcevic
  Vinca Institute of Nuclear Sciences, Belgrade

• E. Perepelkin, A. Vorozhtsov, S. Vorozhtsov
  Joint Institute Nuclear Research /DLNP, Dubna, Moscow Region

The VINCY Cyclotron has to accelerate ions operating with the harmonic number of the RF voltage equal to 1, 2, 3 and 4. Two different central region configurations have been designed in order to satisfy the need for the broad ranges of ion species and energies that are expected to be obtained from the machine. The latest design of the spiral inflector, in the axial injection line, was used in the simulations. We present here only the results of the H–ion beam dynamics simulations. The ion tracking calculations were performed using the CBDA code. The electric and magnetic field maps were obtained using the TOSCA/OPERA3D and MERMAID codes. The measured magnetic field maps were also used. The main criteria used in the simulations were the good centering, the highest possible energy gain in the accelerating gaps, the maximal transmission through the central and acceleration regions, and the best possible quality of the ion beam at the extraction radius. The overall performance of the machine was optimized by adjusting the corresponding operational parameters.

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• E. Perepelkin, A. Vorozhtsov, S. Vorozhtsov, L. Onischenko
  Joint Institute Nuclear Research /DLNP, Dubna, Russia

The compact isochronous cyclotron is considered as a source of 1.75 MeV protons for the detection of explosives using gamma ray resonant absorption technique. Given the marginal request for the beam intensity and quality H¯ ions were selected for acceleration in the cyclotron aiming at the high efficiency extraction by electrostatic deflector. The tracking calculations were performed by the CBDA code. The electric and magnetic field maps were obtained by the TOSCA/OPERA3D and MERMAID codes. Internal and external injection regimes were tried to select from. The space charge effects of the ions were taken into account in the calculations. The main criteria, imposed in selecting of the operational parameters, were good centering, as high as possible energy gain of the ions in the accelerating gaps, the maximal particles transmission through the machine and the best possible beam quality at the final energy. The overall performance of the facility was optimized by adjusting the corresponding parameters of the cyclotron. Simulation of the interface between the cyclotron and the storage ring was performed in order to provide the required intensity and beam quality for injection to the storage ring.

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