Charge stripper ring plan at RIKEN RIBF

Charge stripping process is almost indispensable for efficient accelerations of particularly heavy ions such as uranium in heavy-ion accelerator complex. At the RIKEN RI beam factory (RIBF), the total charge stripping efficiency of two strippers, He gas and rotating graphite sheet disk strippers, used for the uranium acceleration is less than 5% which is a serious bottleneck for further intensity upgrade. We have proposed a novel acceleration scheme with charge stripper rings (CSRs) to increase the charge stripping efficiency as a promising future plan at the RIBF. In this paper, we present some results of calculations on key design issues of the CSR. (author)