Keyword: heavy-ion
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TUC02 Charge Stripper Ring for Cyclotron Cascade acceleration, ion, cyclotron, lattice 155
 
  • H. Imao
    RIKEN Nishina Center for Accelerator-Based Science, Wako, Saitama, Japan
  • N. Fukunishi, O. Kamigaito, M. Kase, H. Okuno, N. Sakamoto, K. Suda, K. Yamada, Y. Yano
    RIKEN Nishina Center, Wako, Japan
 
  In the multi-stage acceleration of heavy ions such as the acceleration at the RIKEN RI beam factory (RIBF), the electron stripping process with charge strippers is an inevitable process for the efficient acceleration. Typical efficiencies, however, for the charge-state conversion of very heavy ions are about 15-30% with common charge strippers. Actually, the total efficiency of two charge strippers for the uranium acceleration at the RIBF is only 6%. The low conversion efficiency is an important bottleneck for the intensity upgrade. Multi-charge acceleration proposed in the FRIB project is a unique method for linac to drastically increase the low conversion efficiency. The method, unfortunately, is not applicable for the ring accelerators such as cyclotrons. In the present study, we designed high-efficient charge stripper rings which have applicability to the cyclotron cascade using the technical knowledge of gas stripper recently developed at the RIBF.  
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THA03 Development of FLNR JINR Heavy Ions Accelerator Complex (DRIBs III) ion, cyclotron, extraction, ion-source 278
 
  • B. Gikal, S.L. Bogomolov, S.N. Dmitriev, G.G. Gulbekyan, I.A. Ivanenko, I.V. Kalagin, N.Yu. Kazarinov, Y.T. Oganessian, N.F. Osipov, S.V. Pashchenko
    JINR, Dubna, Moscow Region, Russia
 
  The cyclotrons of U-400, U-400M, and IC-100 are in operation in the Flerov Laboratory of Nuclear Reactions for implementation of scientific program and applied research. Total operation time of these accelerators is about 15000 hours per year. One of the basic scientific programs in FLNR is the synthesis of new elements that demands intensive beams of heavy ions. Now U-400 is capable to provide long-term experiments on 48Ca beam with intensity of 1 pμA. The high-intensity DC-280 cyclotron has been developed in FLNR in order to increase the 48Ca beam intensity up to 10 pμA for this task. The cyclotron U-400 has been in operation since 1978. The U-400 modernization into U-400R is planned to start after finishing DC-280 project. At the U-400M cyclotron, we plan to increase the ion energy of the extracted beam, which now is limited by 55 MeV/nucleon. The IC-100 is used in the laboratory as a specialized machine for applied research on the heavy ion beams with energies of 1 - 1.2 MeV/nucleon.  
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