Wüest M. 51 Wykes M. 82 Yamaguchi M. 17 Ybarra G. 129 Yubero F ...

JUNE 26 MONDAY MORNING
WS-18-MoM-OR.2 NUMERICAL MODELING OF THE ION BEAM TRANSMIS-
SION EFFICIENCY FOR DESIGN OF THE VACUUM SYSTEM OF THE DC-60 CYCLO-
TRON. A.V. Tikhomirov, G.G. Gulbekian, B.N. Gikal. Flerov Laboratory of Nuclear Reactions,
Joint Institute for Nuclear Research, Joliot-Curie 6, 141980 Dubna, Moscow region, Russia.
The results of a numerical simulation of the transmission efficiency of ion beams in conditions of ion
recharge on the residual gas in the channel of the axial injection, in the DC-60 cyclotron vacuum
chamber, as well as in transport lines of accelerated beams are presented. The computer modeling
programs GENAP and VACLOS have been used. They have been developed and tested on the basis
of experiments on four cyclotrons of heavy ions of the Flerov Laboratory of Nuclear Reactions. They
also have collected an experience of vacuum systems’ design of a number of projects for both design
of new cyclotrons and their upgrade. The simulation programs estimate ion beam losses on the basis
of pressure distribution modeling in vacuum chambers of any arbitrary geometry and also on cross
sections calculation for a recharge of ions in exchange reactions by electrons with molecules of residual
gas in a wide range of energies and masses of ions being accelerated. The outcomes of modeling
have provided the determination of main parameters and technical requirements for the vacuum
system of the DC-60 cyclotron designed for the heavy ion and proton accelerator complex of the
University in Astana of the Republic of Kazakhstan
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